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1 The Bottom Line on Trade Shows (September/October 1992)

The whole point of a trade show is to get leads that will turn into sales. No matter how attractive your booth was, no matter how smoothly the setup and the show ran, no matter how many visitors you had at your booth, if your presence at a show didn't net you any sales, then your considerable investment of time, money, and effort has been wasted.

2 Gear Expo 2007 Show Preview (August 2007)

The organizers of Gear Expo 2007 promise to combine the most popular features of shows past with some innovations for this year’s attendees. By the time the show closes on October 10, the association hopes its targeted 175 exhibitors walk away with new insights leading to profitability and renewed contacts.

3 The IMTS 2000 Primer (July/August 2000)

Founded in 1927 as the Machine Tool Show and held every two years, the International Manufacturing Technology Show (IMTS) has grown into the largest manufacturing trade show in both North and South America. The statistics for the 1998 show offer a glimpse of the magnitude. Over 1,440 exhibitors showed off 60 million pounds of machinery and went through 5 million pounds of display materials during the week long show. The show organizers themselves sent out 2,632,560 promotional pieces. Twenty-three foreign machine tool associations participated. It took 4,600 trucks to get everything to McCormick Place for the show. There were 450 journalists covering the event, which was attended by 121,764 people. There was $1,034.618,000 worth of business transacted on the show floor of IMTS 1998.

4 Operation Trade Show (July/August 1992)

Organizing a successful trade show exhibit is not unlike running Operation Desert Storm. The logistics can be a nightmare; the expense, horrendous; the details, mind-boggling. About the only thing you won't have to cope with is having someone fire SCUD missiles at you.

5 IMTS 2014 Show Stoppers (August 2014)

Special advertising section featuring IMTS 2014 booths you won't want to miss!

6 Gear Expo 2017 Showstoppers (September/October 2017)

This special advertising section highlights exhibitors from Gear Expo 2017 and ASM Heat Treat 2017.

7 Showstoppers (September 2011)

Our special Gear Expo advertising section.

8 Gear Expo 2011 - Show Stoppers (October 2011)

Our special advertising section brings you the highlights of Gear Expo 2011.

9 ASM Heat Treating Show (October 2011)

Map and listings to the ASM Heat Treating Society Conference and Exposition, which is co-located with this year's Gear Expo.

10 Making the Most of Your Trade Show Visit: Avoid These 18 Common Mistakes (July/August 1994)

Going to IMTS? Beware. It's easy to make any number of common mistakes that can turn your productive buying trip into an expensive bomb.

11 IMTS Showstoppers (August 2012)

A special advertising section featuring gear industry exhibitors at IMTS 2012.

12 Showstoppers (September 2012)

Special advertising section for IMTS 2012

13 IMTS 2018 Showstoppers (August 2018)

Our special advertising section highlights some of the booths that will be of interest to gear manufacturers.

14 Gear Expo 99 Wrap-up (January/February 2000)

Many people seem to be counting this year's Gear Expo in Nashville as a resounding success. There were 180 American and international exhibitors occupying over 50,000 square feet of exhibit space in the Nashville Convention Center, with total attendance of 2,700. This figure is dramatically down from past shows but that doesn't seem to be an issue with the show organizers. According to Kurt Medert, vice president of AGMA;s Administrative Division, even though attendance was off from the 1997 show, the exhibitors were pleased with the quality of the people who did come to the show. "This was an excellent show for us," said Marty Woodhouse, vice president of sales for Star Cutter Company and chairman of AGMA's Gear Expo committee. "Our customer base was there and they came to buy. It was very active."

15 ASM Bringing the Heat to Gear Expo (July 2009)

Gear making and heat treating pair together like a fine cabernet and filet mignon. Now for the first time, the two industries are embracing this symbiotic relationship by co-locating their industry events this fall in Indianapolis. ASM International’s 2009 Heat Treating Society Conference and Exposition and Gear Technology’s favorite trade show, Gear Expo, are teaming up September 14–17 at the Indiana Convention Center in Indianapolis.

16 Marco Polo Had it Right (May 2007)

Gear industry suppliers exhibited at the CIMT machine tool show, held in Beijing April 9-15.

17 Heat Treat Society (September 2011)

Co-located ASM and AGMA shows are a hot ticket.

18 AGMA Delegates Meet Chinese Counterparts (January/February 2007)

The AGMA pavilion was a hot spot at October's PTC-Asia show in Shanghai, as evidenced by the intense quoting reported by exhibitors.

19 Gear Expo 2017 Booth Listings (September/October 2017)

Map and directory of Gear Expo 2017. Plan your visit with this handy guide.

20 ASM Heat Treat 2017 (September/October 2017)

Don't miss these exhibitors co-located with Gear Expo.

21 AGMA Gear Expo '89 The Cutting Edge in Pittsburgh (July/August 1989)

AGMA's Gear Expo '89, "The Cutting Edge," opens at the David Lawrence Convention Center in Pittsburgh, PA, on Nov. 6 and runs through Nov. 8. This year's show is "the largest trade show ever conceived specifically for the gear industry," according to Rick Norment, AGMA's executive director. The show is 60% larger in terms of floor space than the 1987 show, and over 90%of the booths have been sold.

22 ASM Booth Previews (October 2011)

Here are some of the new products and technologies available to attendees at Heat Treat 2011.

23 Bigger and Better Than Ever (July/August 1999)

Gear Expo 99, AGMA's biennial showcase for the gear industry, has left the Rust Belt this year and landed in Music City U.S.A., Nashville, Tennessee. The event, with exhibitors from around the globe showing off the latest in gear manufacturing as well as metal working processes, will be held at the Nashville Convention Center, October 24-27, 1999. According to Kurt Medert, AGMA vice president and Gear Expo show manager, "In choosing Nashville, AGMA;s Trade Show Advisory Council found a city that is an excellent trade show site. It has the right mix of convention center, nearby hotels, and a clean downtown area with entertainment readily available for the exhibitors and visitors alike. Nashville is in the heart of southern industry, which we see as a focus of growth for the gear industry and its customers."

24 Kudos To AGMA for Pittsburgh Show (January/February 1990)

AGMA's Gear Expo '89 was, by all accounts, a great success, proving again the wisdom of having a trade show devoted exclusively to gearing and gear-related products. Over 1500 people attended the show, and 86 different companies exhibited their goods and services.

25 Great Expotations (July/August 2001)

Even with some segments of the gear industry facing economic uncertainty, Gear Expo exhibitors and potential visitors are looking forward to this year's show. Instead of focusing on buying and selling, many of those involved with the 2001 show have chosen to focus on the show's value as a marketplace for knowledge.

26 GT Advertisers Among the Hundreds at IMTS 92 (September/October 1992)

8 Gear Technology advertisers will have booths at IMTS 92, the largest trade show in the Western Hemisphere. The show opens in Chicago on Sept. 9 and runs through the 17th. More than 800 companies from around the world will cover some 931,000 sq. ft. of exhibit space to show the latest manufacturing technology - everything from forming and fabrication products to environmental and plant safety equipment.

27 We Hope You Enjoy(ed) the Show (September/October 2018)

IMTS 2018 was the biggest ever, no matter how you want to measure it. With 129,415 registrations, the show far surpassed the previous record of 121,764 set twenty years ago, in 1998. There were also more exhibiting companies (2,563) taking up more floor space (1,424,232 sq. ft.) than ever before.

28 IMTS - North America's Show of Shows (August 2012)

We talked with a number of major companies in the midst of their planning and strategizing for IMTS 2012, with the thought of determining just how much things have in fact changed for exhibitors regarding the trade show experience.

29 IMTS 2000: The World of Manufacturing (September/October 2000)

For eight days every other year, the sponsor of the International Manufacturing Technology Show (IMTS), the Association for Manufacturing Technology (AMT), strives to turn Chicago's McCormick Place into a "productivity marketplace," the largest and most completer display and demonstration of manufacturing technology ever seen in the Americas. If the growth of the show is any indicator, that effort has been very successful indeed. With over 1.4 million square feet of exhibit space taking up all five levels and all three exhibit halls of McCormick Place, each level would rank as one of the nation's 200 largest trade shows. That wasn't always the size or scope of the show. Its inception, while impressive for the time, was humble by today's standards.

30 Industry Shows Shift Emphasis (January/February 1987)

A change has taken place within the industry that is going to have an enormous effect on the marketing, sales, and purchasing of gear manufacturing and related equipment. This change was the American Gear Manufacturers' Association, first biennial combination technical conference and machine tool minishow.

31 IMTS - Big Trade Show for the City of Big Shoulders (July/August 1994)

The biggest industrial trade show in the world this year - and the manufacturing machinery industry's most important marketplace - will be at McCormick Place in Chicago September 7 - 15.

32 Gear Expo 2009 - The Show of Shows for All Things Gearing (August 2009)

As Gear Expo 2009 approaches (Sept. 15–17), the show finds itself in an “It was the best of times, it was the worst of times” mindset.

33 AGMA Promises Bigger, Better Show in Detroit (July/August 1993)

AGMA's Gear Expo '93 is expected to be at least 10% larger in terms of floor space than the '91 show, according to Joe Franklin, AGMA's executive director. "As of June 1, we have 80 exhibitors registered", he says.

34 The Antique Gear Show (October 2011)

While the cable networks seem to be inundated with collectible television shows, the Addendum staff believes there's room for one more.

35 Gear Expo '93 Promises To Be The Biggest All-Gearing Trade Show Yet (July/August 1993)

Gear Expo '93, "The World of Gearing," is scheduled for October 10-13 at Cobo Conference & Exhibition Center, Detroit, MI. Hours are 9 a.m. to 5 p.m. on all four days of the show.

36 Influence of Geometrical Parameters on the Gear Scuffing Criterion - Part 2 (May/June 1987)

In ParI 1 several scuffing (scoring) criteria were shown ultimately to converge into one criterion, the original flash temperature criterion according to Blok. In Part 2 it will be shown that all geometric influences may be concentrated in one factor dependent on only four independent parameters, of which the gear ratio, the number of teeth of the pinion, and the addendum modification coefficient of the pinion are significant.

37 Full Contact Analysis vs. Standard Load Capacity Calculation for Cylindrical Gears (November/December 2018)

In this paper local tooth contact analysis and standard calculation are used to determine the load capacity for the failure modes pitting, tooth root breakage, micropitting, and tooth flank fracture; analogies and differences between both approaches are shown. An example gearset is introduced to show the optimization potential that arises from using a combination of both methods. Difficulties in combining local approaches with standard methods are indicated. The example calculation demonstrates a valid possibility to optimize the gear design by using local tooth contact analysis while satisfying the requirement of documenting the load carrying capacity by standard calculations.

38 Into-Mesh Lubrication of Spur Gears - Part 2 (July/August 1989)

In the lubrication and cooling of gear teeth a variety of oil jet lubrication schemes is sometimes used. A method commonly used is a low pressure, low velocity oil jet directed at the ingoing mesh of the gears, as was analyzed in Reference 1. Sometimes an oil jet is directed at the outgoing mesh at low pressures. It was shown in Reference 2 that the out-of-mesh lubrication method provides a minimal impingement depth and low cooling of the gears because of the short fling-off time and fling-off angle.(3) In References 4 and 5 it was shown that a radially directed oil jet near the out-of-mesh position with the right oil pressure was the method that provided the best impingement depth.

39 Editorial (September/October 1989)

From tiny beginnings, the AGMA Gear Expo is growing into a fine, strapping show. This year's effort, Gear Expo '89, "The Cutting Edge," will be bigger and better than ever. What started as a few tabletop exhibits in Chicago four years ago has now grown to a full-size, international exhibition at the David Lawrence Convention Center in Pittsburgh. With over 160 exhibitors, including major gear manufacturers and suppliers from around the world, this year's show promises to be a great success as well.

40 New Gear Technology at EMO Hannover 2017 (August 2017)

EMO is arguably the most important trade show when it comes to the introduction of machine tool technology, and this year's show - taking place from September 18-23 in Hannover, Germany - promises not to disappoint. We've talked to a number of gear manufacturing technology providers to give you a sneak peak of what you can expect to see if you attend this year.

41 New Product Area Pavilions, SME Conferences Highlight IMTS 92 (July/August 1992)

IMTS 92 - The International Manufacturing Technology Show - opens in Chicago September 9 and runs through September 17 at Chicago's McCormick Place. IMTS is the Western Hemisphere's larges trade show. Over 800 companies from all over the globe will be showing products in exhibits covering some 931,000 sq. ft. of space.

42 Gear Expo 95: Bigger and Better (September/October 1995)

Gear Expo '95, scheduled for November 12-15 at the Indiana Convention center in Indianapolis, IN, will attract more exhibitors from a wider array of industries than any previous show, according to the show's sponsor, the American Gear Manufacturers Association.

43 Explore the World of Gearing from A to Z (September/October 1993)

Forty of Gear Technology's pre-show and show issue advertisers will be exhibiting a wide range of goods and services at AGMA's Gear Expo '93. The exhibition will be held October 10-13 at Cobo Conference & Exhibition Center in Detroit, MI. Below is an alphabetical listing of these advertisers and a preview of what can be seen at their booths.

44 IMTS 2016: Economic Elixir (August 2016)

Peter Eelman has been involved with the International Manufacturing Technology Show for more than 30 years. First as an exhibitor with Warner & Swasey Co.; later with Toyoda USA; later still as a consultant; and currently as vice president for exhibitions and business development, IMTS. He also serves on the board of directors of the exhibitor-appointed Contractor Association and is a former member of the board of directors for the Trade Show Exhibitors Association. Eelman is a speaker with the International Association of Exhibitions and Events and serves on the Metropolitan Chicago Pier & Exposition Authority Labor Council. As the head of IMTS, Eelman is the go-to, make-things-happen guy for the Chicago Convention and Tourism Bureau, the Metropolitan Pier and Exposition Authority, McCormick Place and the various vendors, service providers and trade unions involved in the complex trade show process. In addition to IMTS, Eelman is also prominently involved in shows with an international presence.

45 The Goof-Off Guide to Indy (November/December 1995)

Trade shows can be exhausting. You work hard all day, meeting people, wheeling and dealing, walking the aisles. After a long day of working the show, sometimes you just need to relax for awhile. With Gear Expo '95 fast approaching. Gear Technology has gone ahead and done some of the legwork for you. We've come up with some placed to go and things to do that have absolutely nothing to do with gears.

46 Effect of Web & Flange Thickness on Nonmetallic Gear Performance (November/December 1995)

Gears are manufactured with thin rims for several reasons. Steel gears are manufactured with thin rims and webs where low weight is important. Nonmetallic gears, manufactured by injection molding, are designed with thin rims as part of the general design rule to maintain uniform thickness to ensure even post-mold cooling. When a thin-rimmed gear fails, the fracture is thought the root of the gear, as shown in Fig. 1a, rather than the usual fillet failure shown in Fig. 1b.

47 IMTS: Welcome to the Main Event (July 2016)

It's hard to think of a show more essential to attend than IMTS. It's the cornerstone event for the industry, the center of the universe for a week, the one show to rule them all.

48 Guide to Gear Expo (September/October 1999)

Thousands of gear industry professionals will converge October 24-27 in Nashville, TN, for Gear Expo 99, the industry's biennial collection of the latest in gear manufacturing technology. With nearly 50,000 square feet of exhibit space sold more than two months in advance of the show, this year's Gear Expo will offer visitors more opportunity for supplier comparison than ever before. As of July 20, 166 suppliers of equipment, tooling, services and precision gear products were scheduled to participate, with as many as 20 additional booths yet to be sold, according to AGMA vice president and Gear Expo show manager Kurt Medert. The largest previous Gear Expo was held in 1997 in Detroit, with 43,100 square feet of exhibit space and 161 exhibitors.

49 High-Temperature Testing of Stanyl Plastic Gears: A Comparison with Tensile Fatigue Data (March/April 2010)

This paper shows an experimental study on the fatigue lifetime of high-heat polyamide (Stanyl) gears running in oil at 140°C. Based on previous works (Refs. 1–2), an analysis is made correcting for tooth bending and calculating actual root stresses. A comparison with tensile bar fatigue data for the same materials at 140°C shows that a good correlation exists between gear fatigue data and tensile bar fatigue data. This insight provides a solid basis for gear designers to design plastic gears using actual material data.

50 Editorial (September/October 1986)

"It's show time!" Ready or not, on Sept 3, the biennial International Machine Tool Show opens at McCormick Place, Chicago. Planning a show that encompasses displays from over 1000 companies from 29 nations and an associated technical conference presenting more than 200 papers on 50 topics has not been without its problems.

51 What's In a Name (March/April 2019)

As most of you know by now, the trade show formerly known as Gear Expo is now the Motion + Power Technology Expo. If you're a gear-industry veteran, you might be confused by this change. If you've been coming to the show for years - or exhibiting at it - you might even feel a little betrayed. But I'm here to tell you it's going to be alright.

52 Show Stoppers (August 2016)

Our special advertising section featuring some of the premier gear industry suppliers at IMTS 2016.

53 Showstoppers - Gear Expo 2013 (August 2013)

Our special advertising section featuring Gear Expo exhibitors.

54 Gear Expo 2007 Showstoppers (September/October 2007)

[special advertising section]

55 Gear Expo Showstoppers (September/October 2003)

A guide to companies to see at Gear Expo.

56 SARJ Repairs Show Promise for Space Station Solar Power (January/February 2009)

Much has happened since we last reported on the malfunctioning solar array rotary joint (SARJ) attached to the International Space Station. Space shuttle Endeavour dropped in for a two-week visit in November during which repairs were made and invaluable data collected.

57 After Show Hours in Columbus (September/October 2003)

Whatever your pleasure, Columbus is sure to have something to occupy those rare free hours you spend outside of Gear Expo.

58 What "Ease-Off" shows about Bevel and Hypoid Gears (September/October 2001)

The configuration of flank corrections on bevel gears is subject to relatively narrow restrictions. As far as the gear set is concerned, the requirement is for the greatest possible contact zone to minimize flank compression. However, sufficient reserves in tooth depth and longitudinal direction for tooth contact displacement should be present. From the machine - and particularly from the tool - point of view, there are restrictions as to the type and magnitude of crowning that can be realized. Crowning is a circular correction. Different kinds of crowning are distinguished by their direction. Length crowning, for example, is a circular (or 2nd order) material removal, starting at a reference point and extending in tooth length or face width.

59 Showstoppers (advertising section) (July/August 2004)

This special advertising section features some of the premier gear-related exhibitors at IMTS 2004.

60 The Greatest Show and Tell on Earth (March/April 2018)

It's Perfectly Acceptable to Bring Work Home with You for Maker Faire

61 Gear Expo Showstoppers (August 2017)

Special Advertising Section featuring Gear Expo exhibitors.

62 IMTS 2004 Showstoppers (advertising) (September/October 2004)

Special advertising section featuring gear industry exhibitors.

63 Showstoppers (September 2013)

Our special advertising section featuring exhibitors from Gear Expo and ASM Heat Treat 2013

64 A Bicycle with Real Gears (May/June 2003)

The Addendum team was in Chicago in early March, for the National Manufacturing Week show, when it saw something unusual: a bicycle with gears. Real gears, Spiral bevel gears, in fact.

65 Characterizaton of Retained Austenite in Case Carburized Gears and Its Influence on Fatigue Performance (May/June 2003)

Carburized helical gears with high retained austenite were tested for surface contact fatigue. The retained austenite before test was 60% and was associated with low hardness near the case's surface. However, the tested gears showed good pitting resistance, with fatigue strength greater than 1,380 MPa.

66 Systematic Investigations on the Influence of Viscosity Index Improvers on EHL Film Thickness (November/December 2001)

Mineral-oil-base lubricants show a significant decrease of kinematic viscosity with rising temperature, as exemplified in Figure 1 by lubricants for vehicle gears. An important attribute of lubricants is their viscosity index (VI), according to DIN/ISO 2909 (Ref. 4). Viscosity index is a calculated coefficient, which characterizes the change of viscosity of lubricants as a function of temperature. A high viscosity index represents a low variation of viscosity due to temperature and vice versa. A low viscosity-temperature-dependence is required for lubricants that are operated at significantly varying temperature conditions, such as vehicle engine and gear lubricants in summer and winter time. This way, the oils remain flowing and pumpable at low temperatures on the one hand; and on the other hand, sufficiently thick lubricant films can be formed at higher temperatures for a safe separation of the surfaces.

67 The "Unofficial Guide" to Gear Expo 2001 (September/October 2001)

We've contacted many of the companies that will be exhibiting at Gear Expo 2001 to compile the following directory of exhibits. Use this directory to help plan your visit to the show, or to stay up-to-date on the industry's suppliers and technology.

68 Shades of Gray (July/August 2003)

In America and most parts of the world, people are looking for answers about what's going to happen next in the manufacturing economy. We're all looking for evidence that better times are ahead, or at least that the worst is over. We crave a clear indicator, something that shows us in black and white that the situation is going to get better.

69 Eyes on Detroit (July/August 2001)

If you think of Gear Expo as only a machine tool show, you're not seeing all of its potential. You may be tempted to skip it this year, especially if you're struggling to fill your current capacity. I've heard too many stories of canceled orders, falling profits and slashed budgets to believe that great numbers of you will be attending Gear Expo with buying new machines as your No. 1 priority.

70 The Name Game (November/December 2000)

The addendum team has just returned from IMTS 2000, and we were surprised to see several new names among the gear industry suppliers at the show.

71 Evaluation of Carburized & Ground Face Gears (September/October 2000)

Designers are constantly searching for ways to reduce rotocraft drive system weight. Reduced weight can increase the payload, performance, or power density of current and future systems. One example of helicopter transmission weight reduction was initiated as part of the United States Army Advanced Rotocraft Transmission program. This example used a split-torque, face-gear configuration concept (Ref. 1). compared to a conventional design with spiral-bevel gears, the split-torque, face-gear design showed substantial weight savings benefits. Also, the use of face gears allows a wide-range of possible configurations with technical and economic benefits (Ref. 2).

72 The Effect of Material Defects on Gear Perfomance - A Case Study (March/April 2000)

The quality of the material used for highly loaded critical gears is of primary importance in the achievement of their full potential. Unfortunately, the role which material defects play is not clearly understood by many gear designers. The mechanism by which failures occur due to material defects is often circuitous and not readily apparent. In general, however, failures associated with material defects show characteristics that point to the source of the underlying problem, the mechanism by which the failure initiated, and the manner in which it progressed to failure of the component.

73 Low Vibration Design on A Helical Gear Pair (January/February 2000)

Helical gear pairs with narrow face width can be theoretically classified into three categories over the contact ration domain whose abscissa is the transverse contact ration and whose ordinate is the overlap contact ratio. There is a direct relation between vibration magnitude and shaft parallelism deviation. To clarify the effect of the tooth deviation types on the vibration behavior of helical gear pairs, performance diagrams on vibration are introduced. the acceleration levels of gear pairs are shown by contour lines on the contact ratio domain. Finally, the performance of gears with bias-in and bias-out modifications is discussed considering the effect of the shaft parallelism deviation with use of the developed simulator on a helical gear unit. It becomes clear that there is an asymmetrical feature on the relation between the vibration magnitude of a gear pair and the direction of each deviation.

74 Evaluation of Bending Strength of Carburized Gears (May/June 2004)

The aim of our research is to clearly show the influence of defects on the bending fatigue strength of gear teeth. Carburized gears have many types of defects, such as non-martensitic layers, inclusions, tool marks, etc. It is well known that high strength gear teeth break from defects in their materials, so it’s important to know which defect limits the strength of a gear.

75 Don't Miss These Booths! (September/October 1999)

We've contacted many of the gear industry's leading suppliers to find out what they'll be showing at Gear Expo 99. Booth numbers are current as of July 31, 1999, but they are subject to change. A current list of exhibitors and booth information is available at the AGMA Web site at www.agma.org.

76 Kicking Tires (July/August 1999)

For the first time in probably 15 years, I've attended an auto show. Although I haven't been purposely avoiding them, over the past decade or so, the auto industry hasn't given me a compelling reason to go.

77 IMTS 2012 Events, Conferences and Some Just Plain Fun (September 2012)

IMTS exists primarily as a buy-and-sell North American venue for practically every conceivable technology used in manufacturing, and in that regard it has no equal. There you’ll find on display the latest and greatest technology, from hardware to software and everything in between. But anyone who has attended past shows is aware that IMTS is much more than that. Following is a rundown of "extracurricular" activities you’ll find waiting for your edification and enjoyment.

78 Clouds in the Crystal Ball (November/December 1998)

The carnival that is IMTS has come and gone. The aisles have been swept, and all the banners have been taken down. The fanfare of what some call the greatest machine tool show on earth has faded away.

79 Hobs & Form Relived Cutters: Common Sharpening Problems (May/June 1998)

Fig. 1 shows the effects of positive and negative rake on finished gear teeth. Incorrect positive rake (A) increase the depth and decreases the pressure angle on the hob tooth. The resulting gear tooth is thick at the top and thin at the bottom. Incorrect negative rake (B) decreases the depth and increases the pressure angle. This results in a cutting drag and makes the gear tooth thin at the top and thick at the bottom.

80 Programmable Separation of Runout From Profile and Lead Inspection Data for Gear Teeth With Arbitrary Modifications (March/April 1998)

A programmable algorithm is developed to separate out the effect of eccentricity (radial runout) from elemental gear inspection date, namely, profile and lead data. This algorithm can be coded in gear inspection software to detect the existence, the magnitude and the orientation of the eccentricity without making a separate runout check. A real example shows this algorithm produces good results.

81 Positive Trends, Hot Products, Minor Quibbles and Other Notes From Gear Expo 97 (January/February 1998)

Notes from Detroit...Overall, Gear Expo 97, the AGMA biennial trade show, was a success. While attendance may not have been what some people had hoped for, the quality of the attendees was high. Serious buyers came and brought their checkbooks.

82 Looking to The Future (September/October 1997)

Economic times are good right now in America and in the gear industry. We're in the seventh year of an up cycle. The tough shake-outs of the 1980s and early 90s are over. Orders are up. Backlogs are at comfortable levels. We're looking at what promises to be the biggest, most successful trade show in the industry's history coming up in Detroit in October. The most pressing question on the immediate horizon seems to be "How long can the good times go on?"

83 Detroit in 97 - the Biggest Gear Expo Ever (July/August 1997)

"A Decade of Performance" is the theme of the American Gear Manufacturers Association Gear Expo 97, to be held October 19-22 at Detroit's Cobo Hall. Products and services related to every aspect of the gear manufacturing process, from turning and grinding the blanks to coating and inspection of the gears,will be represented at the show.

84 Kish Method for Dermination of Hunting Mesh (May/June 1997)

When designing a gear set, engineers usually want the teeth of the gear (Ng) and the pinion (Np) in a "hunting" mesh. Such a mesh or combination is defined as one in which the pinion and the gear do not have any common divisor by a prime number. If a mesh is "hunting," then the pinion must make Np x Ng revolutions before the same pinion tooth meshes with the same gear space. It is often easy to determine if a mesh is hunting by first determining if both the pinion and the gear teeth are divisible by 2,3,5,7,etc. (prime numbers). However, in this age of computerization, how does one program the computer to check for hunting teeth? A simple algorithm is shown below.

85 Meshing of a Spiral Bevel Gear Set With 3-D Finite Element Analysis (March/April 1997)

Recent advances in spiral bevel gear geometry and finite element technology make it practical to conduct a structural analysis and analytically roll the gear set through mesh. With the advent of user-specific programming linked to 3-D solid modelers and mesh generators, model generation has become greatly automated. Contact algorithms available in general purpose finite element codes eliminate the need for the use and alignment of gap elements. Once the gear set it placed in mesh, user subroutines attached to the FE code easily roll it through mesh. The method is described in detail. Preliminary result for a gear set segment showing the progression of the contact line load is given as the gears roll through mesh.

86 New Gear Developments at IMTS (November/December 1996)

The International Manufacturing Technology Show provided one of the biggest ever marketplaces for buying and selling gear-making equipment, with 121601 attenders, making it the largest IMTS ever. The show took place September 4-11 at McCormick Place in Chicago, IL.

87 Alternative Lubrication Methods for Large Open Gear Drives (September/October 1996)

The type of lubricant and the method of applying it to the tooth flanks of large open gears is very important from the point of view of lubrication technology and maintenance. When selecting the type of lubricant and the application method, it is important to check whether it is possible to feed the required lubricant quantity to the load-carrying tooth flanks, This is necessary to avoid deficient lubrication, damage to the gear and operational malfunctions. It is important to determine the type of lubricant, which may be fluid or grease-like. The consistency of the lubricant will have a direct impact on the ability of the lubrication system to feed adequately the lubricant to the gear. The interactions between the common types of lubricant and the lubrication application methods for open gear drives are shown in Fig. 1.

88 IMTS Traveling Companion (September/October 1996)

The gear lover's guide to "da show," plus native dishes, language lessons, amazing factoids and other bits about our kind of town.

89 IMTS 2012 Product Preview (August 2012)

Booth previews from exhibitors showing products and services for the gear industry.

90 If Only We Had a Crystal Ball... (November/December 2012)

Before we get into projections and prognostications about the future, let’s take a minute to review 2012. For many in the gear industry, the year was better than expected. Some manufacturers had a very successful year leading up to an even more successful manufacturing trade show (IMTS 2012). Others were searching for more business, hoping that the general state of the economy wouldn’t make things worse. In some cases, it did.

91 AMB 2012 Focuses on Technology Integration and Education (October 2012)

A large number of technologies aimed primarily at higher productivity were presented by exhibitors at the AMB, International Exhibition for Metal Working at the Stuttgart Trade Fair Centre in September. Following the successful 2010 show, AMB 2012 boasted further developments in energy and resource efficiency, higher productivity, life cycle performance, quality assurance and user-friendliness.

92 Process Model for Honing Larger Gears (November/December 2015)

Hard finishing technology, e.g. — honing — is used to manufacture high-performance gears. Gear honing is primarily used to hard finish small- and medium-sized automotive gears. And yet trials have shown that gears with a module larger than mn = 4 mm can also be honed efficiently, but problems often occur due to unstable process design. In this paper a model to improve the process design is described.

93 Influence of the Defect Size on the Tooth Root Load Carrying Capacity (November/December 2017)

The objective of this work is to introduce a method for the calculation of the tooth root load carrying capacity for gears, under consideration of the influence of the defect size on the endurance fatigue strength of the tooth root. The theoretical basis of this method is presented in this paper as well as the validation in running tests of helical and beveloid gears with different material batches, regarding the size distribution of inclusions. The torque level for a 50 percent failure probability of the gears is evaluated on the test rig and then compared to the results of the simulation. The simulative method allows for a performance of the staircase method that is usually performed physically in the back-to-back tests for endurance strength, as the statistical influence of the material properties is considered in the calculation model. The comparison between simulation and tests shows a high level of accordance.

94 Material Assets (November/December 2017)

You get one shot to make a first impression. One opportunity to show your customers, vendors and suppliers that you provide a steady, reliable product that will generate repeat business. How do you make this happen? What tools and strategies are available to get gear materials (forgings, gear blanks, etc.) shipped faster and more efficiently in today's tech-heavy, fast-paced, manufacturing environment?

95 Calendar (July 2017)

Upcoming conferences, trade shows and events from the July 2017 issue of Gear Technology.

96 Designing Very Strong Gear Teeth by Means of High Pressure Angles (June 2017)

The purpose of this paper is to present a method of designing and specifying gear teeth with much higher bending and surface contact strength (reduced bending and surface contact stresses). This paper will show calculation procedures, mathematical solutions and the theoretical background equations to do this.

97 Calendar (March/April 2017)

AGMA training classes, trade shows, technical conferences and more.

98 Performance of Gears Manufactured by 5-Axis Milling (March/April 2017)

Free form milling of gears becomes more and more important as a flexible machining process for gears. Reasons for that are high degrees of freedom as the usage of universal tool geometry and machine tools is possible. This allows flexible machining of various gear types and sizes with one manufacturing system. This paper deals with manufacturing, quality and performance of gears made by free form milling. The focus is set on specific process properties of the parts. The potential of free form milling is investigated in cutting tests of a common standard gear. The component properties are analyzed and flank load-carrying capacity of the gears is derived by running trials on back-to-back test benches. Hereby the characteristics of gears made by free form milling and capability in comparison with conventionally manufactured gears will be shown.

99 Repair of Large, Surface-Degraded Industrial Gears - a New Approach (January/February 2017)

This paper presents a new approach to repair industrial gears by showing a case study where pressure angle modification is also considered, differently from the past repairing procedures that dealt only with the modification of the profile shift coefficient. A computer program has been developed to automatically determine the repair alternatives under two goals: minimize the stock removal or maximize gear tooth strength.

100 Challenges Tempered by Optimism (January/February 2017)

For many of us, 2016 was a rough year - and the results of our annual State of the Gear Industry Survey show it. 40% of respondents indicated their companies had cut staff, while only 27% indicated an increase in employment. Clearly, there have been widespread cutbacks.

101 Influence of Topography Deviations on the Psychoacoustic Evaluation of Ground Bevel Gears (November/December 2016)

In the design process of transmissions, one major criterion is the resulting noise emission of the powertrain due to gear excitation. Within the past years, much investigation has shown that the noise emission can be attributed to quasi-static transmission error. Therefore, the transmission error can be used for a tooth contact analysis in the design process, as well as a characteristic value for quality assurance by experimental inspections.

102 Locating Multiple Bore Diameters Via Hobbing (November/December 2016)

Attached photos (Figs. 1-2) show a bushing to locate one single bore. This will be used to locate one single bore diameter of a gear wheel. What is (the latest) technology for common clamping a bushing to locate multiple bore diameters in hobbing?

103 Most Famous Gear in Motown (September/October 2016)

It's hard for me to think of a massive Christmas exhibit as being the fifth largest tourist attraction in the entire country. I mean, sure, it's still a tradition to show up at the local Macy's to check out the Christmas decorations, but for my generation, the idea that a Christmas exhibit could draw out 1.5 million visitors, more tourists than either Yellowstone Park or the Statue of Liberty received, is stunning. But at the height of its popularity, that's exactly what the Ford Rotunda was.

104 IMTS Cuts the Mustard (September/October 2016)

IMTS, held bi-annually here in Chicago, ended September 17. It was the third-largest IMTS ever, both in terms of registrations (115,612) and exhibit space occupied (1,370,256 square feet). Also, this year's show had more exhibiting companies (2,407) than any previous IMTS.

105 Improved Broaching Steel Technology (July 2016)

Broaching is a machining technique commonly used to cut gear teeth or cam profiles for the high volume manufacture of power transmission parts used in vehicles (Refs. 1–2). This article shows how the right gear blank material can make all the difference if you want to get more parts out of each tool.

106 Practical Approach to Determining Effective Case Depth of Gas Carburizing (March/April 2016)

Effective case depth is an important factor and goal in gas carburizing, involving complicated procedures in the furnace and requiring precise control of many thermal parameters. Based upon diffusion theory and years of carburizing experience, this paper calculates the effective case depth governed by carburizing temperature, time, carbon content of steel, and carbon potential of atmosphere. In light of this analysis, carburizing factors at various temperatures and carbon potentials for steels with different carbon content were calculated to determine the necessary carburizing cycle time. This methodology provides simple (without computer simulation) and practical guidance of optimized gas carburizing and has been applied to plant production. It shows that measured, effective case depth of gear parts covering most of the industrial application range (0.020 inch to over 0.250 inch) was in good agreement with the calculation.

107 Development of Usable Bevel Gearset with Length and Profile Crowning (November/December 2015)

In the previous sections, the development of conjugate bevel gearsets via hand calculations was demonstrated. The goal of this exercise was to encourage the reader to gain a basic understanding of the theory of bevel gears. This knowledge will help gear engineers to better judge bevel gear design and their manufacturing methods. In order to make the basis of this learning experience even more realistic, this chapter will convert a conjugate bevel gearset into a gearset that is suitable in a real-world application. Length and profile crowning will be applied to the conjugate flank surfaces. Just as in the previous chapter, all computations are demonstrated as manual hand calculations. This also shows that bevel gear theory is not as complicated as commonly assumed.

108 What We Learned @IMTS (October 2012)

They only let the Addendum team on the show floor for one day (they said it was something to do with their liability insurance...), but here's what our intrepid team of gear fanatics noticed at IMTS 2012.

109 Gear Expo 2013 - An Oscar-Worthy Indy Production (August 2013)

We are well into an odd-number year, so it must be just about time for another Gear Expo. Indeed, the big show -- Gear Expo 2013 -- kicks off in Indianapolis at 9:00 a.m. Tuesday, September 17, wrapping up Thursday the 19th at 4:00 p.m. And whether you are exhibiting or attending, the bottom line is you are going -- a good thing for you, your company and the tightly knit U.S. gear industry.

110 Load Carrying Capacity of Screw Helical Gears with Steel Pinions and Plastic Wheels (July/August 2004)

There is an increasing significance of screw helical and worm gears that combine use of steel and plastics. This is shown by diverse and continuously rising use in the automotive and household appliance industries. The increasing requirements for such gears can be explained by the advantageous qualities of such a material combination in comparison with that of the traditional steel/bronze pairing.

111 Lean Shipping - Job Shop Lean (March/April 2013)

The shipping department is the closest to the customer, and its main objective is to maximize shipped orders every month. Our lean guru shows how to eliminate waste in the shipping department.

112 If You Rebuild It, They Will Buy It (May 2013)

It’s been said that the best ideas are often someone else's. But with rebuilt, retrofitted, re-controlled or remanufactured machine tools, buyer beware and hold onto your wallet. Sourcing re-work vendors and their services can require just as much homework, if not necessarily dollars, as with just-off-the-showroom-floor machines.

113 Light Weight Assembled Gears - A Green Design Solution (May 2013)

It is widely recognized that the reduction of CO2 requires consistent light-weight design of the entire vehicle. Likewise, the trend towards electric cars requires light-weight design to compensate for the additional weight of battery systems. The need for weight reduction is also present regarding vehicle transmissions. Besides the design of the gearbox housing, rotating masses such as gear wheels and shafts have a significant impact on fuel consumption. The current technology shows little potential of gear weight reduction due to the trade-off between mass optimization and the manufacturing process. Gears are usually forged followed or not by teeth cutting operation.

114 New Methods for the Calculation of the Load Capacity of Bevel and Hypoid Gears (June/July 2013)

Flank breakage is common in a number of cylindrical and bevel gear applications. This paper introduces a relevant, physically based calculation method to evaluate flank breakage risk vs. pitting risk. Verification of this new method through testing is demonstrably shown.

115 Crash Course on New Technology (August 2013)

It's nice to see old friends. It's also advantageous to make new ones. Gear Expo has always been a family reunion of sorts, but it's first and foremost an opportunity to show off the latest and greatest technologies that are impacting the gear industry today. With this in mind, Gear Technology recently spoke with those responsible for putting the Fall Technical Meeting (FTM) and Gear Expo 2013 together in Indianapolis.

116 Automotive Transmission Design Using Full Potential of Powder Metal (August 2013)

For metal replacement with powder metal (PM) of an automotive transmission, PM gear design differs from its wrought counterpart. Indeed, complete reverse-engineering and re-design is required so to better understand and document the performance parameters of solid-steel vs. PM gears. Presented here is a re-design (re-building a 6-speed manual transmission for an Opel Insignia 4-cylinder, turbocharged 2-liter engine delivering 220 hp/320 N-m) showing that substituting a different microgeometry of the PM gear teeth -- coupled with lower Young’s modulus -- theoretically enhances performance when compared to the solid-steel design.

117 Gear Mathematics for Bevel & Hypoid Gears (August 2015)

The calculation begins with the computation of the ring gear blank data. The geometrically relevant parameters are shown in Figure 1. The position of the teeth relative to the blank coordinate system of a bevel gear blank is satisfactorily defined with...

118 Heat Treat 2013 Map and Listings (September 2013)

Your guide to the booths at ASM's Heat Treat 2013 show.

119 GT Extras (November/December 2013)

GT Videos and upcoming trade shows featured on the site, links to our 2014 Media Kits and current discussions on LinkedIn and Facebook.

120 Press Quenching and Effects of Prior Thermal History on Distortion during Heat Treatment (March/April 2014)

Precision components (industrial bearing races and automotive gears) can distort during heat treatment due to effects of free or unconstrained oil quenching. However, press quenching can be used to minimize these effects. This quenching method achieves the relatively stringent geometrical requirements stipulated by industrial manufacturing specifications. As performed on a wide variety of steel alloys, this specialized quenching technique is presented here, along with a case study showing the effects of prior thermal history on the distortion that is generated during press quenching.

121 Beginning, Renewing, Sharing - an IMTS Journey for Everyone (August 2014)

IMTS is about beginnings. This year's show takes place September 8-13 at McCormick Place in Chicago. With more than 1,900 exhibitors expected to occupy more than 1.2 million square feet of exhibit space, there will be plenty of technology on display.

122 Good Morning, Class (June 2015)

Since we began publishing in 1984, Gear Technology's mission has been to educate our readers. For 31 years, we've shown you the basics of gear manufacturing as well as the cutting edge. We take our educational mission quite seriously, and we go through steps that most publishers don't have time for or wouldn't consider.

123 One More Reason (July 2015)

If you haven’t already done so, you should make plans to attend Gear Expo in September. It’s a unique and important show, and you should take advantage of it.

124 Gear Technology User's Guide to IMTS '96 (July/August 1996)

IMTS: It can be the best of times or the worst of times. The best because nowhere will you find more equipment, products and services for your business than at McCormick Place, Chicago, in September; the worst because finding your way around the show and around the city can be a hassle.

125 Gear Terms You Didn't Know About (May/June 1996)

The word gear, in various forms, has been in use since around A.D. 1200, according to the Oxford English Dictionary. Last issue we brought you Shakespearean gears. Now we'd like to show you some of the uses Americans have given our favorite word (from the Random House Dictionary of American Slang).

126 Gear Expo 95 Best Ever (January/February 1996)

Gear Expo '95, held in Indianapolis, November 12-15, 1995, closed to rave reviews from both the attenders and the exhibitors. Traffic for the show was well up from 1993, with a total of about 4,000 visitors during the 3 1/2 day exhibition. One hundred thirty-two companies from all over the U.S. and as far away as India and The People's Republic of China displayed their wares.

127 Report from India (March/April 2012)

Publisher Michael Goldstein describes his experiences at the IPTEX 2012 show and the unveiling of Gear Technology India.

128 AMB 2010 Points to Recovery (January/February 2011)

With 86,202 visitors, The International Exhibition for Metal Working (AMB 2010) in Stuttgart, Germany, managed to slightly exceed attendance from the 2008 show (85,143). The metalworking industry celebrated its comeback with visitors from more than 80 countries. In addition, AMB 2010 set a new record with 1,346 exhibitors (2008: 1,306).

129 Gear Expo: Changing with the Times (June/July 2011)

AGMA president Joe T. Franklin Jr. talks about how the AGMA Gear Expo has grown and changed since its beginnings as a table-top show in 1987.

130 Drive Line Analysis for Tooth Contact Optimization of High-Power Spiral Bevel Gears (June/July 2011)

In the majority of spiral bevel gears, spherical crowning is used. The contact pattern is set to the center of the active tooth flank and the extent of the crowning is determined by experience. Feedback from service, as well as from full-torque bench tests of complete gear drives, has shown that this conventional design practice leads to loaded contact patterns, which are rarely optimal in location and extent. Oversized reliefs lead to small contact area, increased stresses and noise, whereas undersized reliefs result in an overly sensitive tooth contact.

131 No Shortage of New Technology at EMO Hannover (August 2011)

Metalworking technology specialists will be front and center for six days at EMO Hannover 2011 (September 19–24). More than 2,000 companies from 38 countries will be on-hand to show off products and services, spotlighting their performance capabilities.

132 Perhaps When You Need It Most (September 2011)

Gear Expo 2011 may well be a special event. Interviews with show organizers.

133 EMO Hannover - More than Machine Tools (October 2011)

Some gear-related highlights from the recent EMO show in Hannover, Germany.

134 Identification and Correction of Damaging Resonances in Gear Drives (August/September 1984)

As a result of extensive research into the vibration characteristics of gear drives, a systematic approach has evolved, by which damaging resonances can be eliminated. The method combines finite element techniques with experimental signature and modal analyses. Implementation of the bulk of the method can be carried out early in the design stage. A step-by-step description of the approach, as it was applied to an existing accessory drive, is given in the text. It is shown how premature bearing failures were eliminated by detuning the torsional oscillations of a gearshaft. A dramatic reduction in vibration levels was achieved as a result of detuning the problem gear. The proposed approach can be extended to other types of rotating machines.

135 What's the Big Attraction - IMTS 2010 (September/October 2010)

The great thing about a trade show the size of IMTS is the amount of options available to attendees. If you’re into cars, fighter jets, machine tools, fighting robots, manufacturing relics or simply the latest technology advancements in a particular industry, you’ll find it at IMTS 2010.

136 Design of Involute Gear Teeth (October/November 1984)

In designing involute gear teeth, it is essential that the fundamental properties of the involute curve be clearly understood. A review of "the Fundamental Laws of the Involute Curve" found in last issue will help in this respect. It has previously been shown that the involute curve has its origin at the base circle. Its length, however, may be anything from zero at the origin or starting point on to infinity. The problem, therefore, in designing gear teeth, is to select that portion of the involute, which will best meet all requirements.

137 Engineering Constants (July/August 1986)

Below are listed a variety of commonly used constants arranged numerically to permit ease of reference. Wherever an asterisk (*) is shown, the constant is exact as given, it being generally a mathematical constant or one fixed by definition. In cases where the first constant listed is followed by another in parenthesis, the first is the round number generally used, while the second is the more exact value.

138 Notes From the Editor's Desk (July/August 1986)

The last two months have been both a time of difficulty and of growth for Gear Technology. Unexpectedly, I found myself in the hospital having surgery, and consequently out of commission for several weeks. At the same time, two individuals on our staff lost family members, and most of this period saw us getting ready for this preshow IMTS issue while being seriously short-staffed.

139 Pressure Angle Changes in the Transverse Plane for Circular Cut Spiral Bevel Gears (September/October 1986)

Recently it has been suggested that the transverse plane may be very useful in studying the kinematics and dynamics of spiral bevel gears. The transverse plane is perpendicular to the pitch and axial planes as shown in Fig. 1. Buckingham has suggested that a spiral bevel gear may be viewed as a limited form of a "stepped" straight-tooth gear as in Fig. 2. The transverse plane is customarily used in the study of straight toothed bevel gears.

140 IMTS 2004 Sneak Preview (July/August 2004)

There’s a bustle of activity as exhibitors prepare for America’s most significant manufacturing trade show. The red carpets are ready, the lights are being tested, and the crowds are gathering with anticipation. Amid the excitement, Gear Technology has managed to sneak under the usher’s ropes to provide you with this advance look at some of the gear-related products and technologies that will be featured at IMTS 2004.

141 Lubricant Jet Flow Phenomena in Spur and Helical Gears (January/February 1987)

In the gearing industry, gears are lubricated and cooled by various methods. At low to moderate speeds and loads, gears may be partly submerged in the lubricant which provides lubrication and cooling by splash lubrication. With splash lubrication, power loss increases considerably with speed. This is partially because of churning losses. It is shown that gear scoring and surface pitting can occur when the gear teeth are not adequately lubricated and cooled.

142 The Effect of Straight-Sided Hob Teeth (November/December 2010)

It is well known that hobs with straight-sided teeth do not cut true involutes. In this paper, the difference between the straight side of a hob tooth and the axial profile of an involute worm is evaluated. It is shown that the difference increases as the diametral pitch increases, to the extent that for fine-pitch gearing, the difference is insignificant.

143 IMTS 2010: Pumping Blood into the International Manufacturing Community (August 2010)

If the free iPad giveaway from FANUC doesn’t draw you in, the wall-to-wall new machine tool technology displays should have you stopped dead in your tracks. To be exact, there will be 1.2 million square feet of exhibit space that may have your jaw dropping. IMTS may be the last show you want to forget to bring walking shoes to.

144 Avoiding Interference In Shaper-Cut Gears (January/February 1996)

In the process of developing gear trains, it occasionally occurs that the tip of one gear will drag in the fillet of the mating gear. The first reaction may be to assume that the outside diameter of the gear is too large. This article is intended to show that although the gear dimensions follow AGMA guidelines, if the gear is cut with a shaper, the cutting process may not provide sufficient relief in the fillet area and be the cause of the interference.

145 A Study on Reducing Gear Tooth Profile Error by Finish Roll Forming (July/August 2005)

The authors have developed a rack-type rolling process in which a rack tool is used to roll gear teeth. The results and analysis show that the proposed method reduces errors.

146 The Unofficial Guide to Gear Expo (September/October 2007)

Map of the show and booth listings.

147 Gear Expo 2007 (September/October 2007)

"Eighty percent of success is showing up" -- Woody Allen

148 High Speed Gears (September/October 2007)

Above all, a gear is not just a mechanical transmission, but is developed to a system fulfilling multiple demands, such as clutch integration, selectable output speeds, and controls of highest electronic standards. This paper shows the basics for high-speed gear design and a selection of numerous applications in detailed design and operational needs.

149 Influence of Surface Roughness on Gear Pitting Behavior (May/June 2006)

In earlier studies, surface roughness has been shown to have a significant influence on gear pitting life. This paper discusses how high surface roughness introduces a wear mechanism that delays the formation of pits. Accompanied by a full-page technical review.

150 AMT Expects Increase in Attendees Over 2004 (July/August 2006)

Lines at McCormick Place's Starbucks concession stand will probably be a little longer at IMTS 2006, but the show's organizers won't be complaining.

151 Characteristics of Master Gears (November/December 2006)

The two-flank roll test measures kickout (tooth-to-tooth composite error) and tooth thickness. In this article, it will be shown that measured values vary with the number of teeth on the master gear.

152 Events (November/December 2005)

The complete Events section from November/December 2005, including post-show coverage of Gear Expo 2005, AGMA's Fall Technical Meeting, and our regular technical calendar.

153 Ready or Not, Here it Comes (August 2010)

IMTS is coming, whether you're ready or not. No matter what your current situation, you should consider going to the show.

154 Sounds Like a Job for Toolman (November/December 2005)

While the rest of the exhibitors were selling machinery, the Addendum team scoured the floor of Gear Expo in a quest to find quirky things at the show.

155 IMTS 2008: The Focus--Global Technology (August 2008)

It’s that even-numbered-year time-of-the-year again. The International Manufacturing Technology Show, IMTS 2008, is right around the corner. This 27th installment of the biennial trade show is focusing on connecting global technology.

156 An Innovative Way of Designing Gear Hobbing Processes (May 2012)

In today’s manufacturing environment, shorter and more efficient product development has become the norm. It is therefore important to consider every detail of the development process, with a particular emphasis on design. For green machining of gears, the most productive and important process is hobbing. In order to analyze process design for this paper, a manufacturing simulation was developed capable of calculating chip geometries and process forces based on different models. As an important tool for manufacturing technology engineers, an economic feasibility analysis is implemented as well. The aim of this paper is to show how an efficient process design—as well as an efficient process—can be designed.

157 Implementing ISO 18653-Gears: Evaluation of Instruments for Measurement of Individual Gears (May 2010)

A trial test of the calibration procedures outlined in ISO 18653—Gears: Evaluation of Instruments for the Measurement of Individual Gears, shows that the results are reasonable, but a minor change to the uncertainty formula is recommended. Gear measuring machine calibration methods are reviewed. The benefits of using workpiece-like artifacts are discussed, and a procedure for implementing the standard in the workplace is presented. Problems with applying the standard to large gear measuring machines are considered and some recommendations offered.

158 Software-Based Process Design in Gear Finish Hobbing (May 2010)

In this paper, the potential for geometrical cutting simulations - via penetration calculation to analyze and predict tool wear as well as to prolong tool life - is shown by means of gear finish hobbing. Typical profile angle deviations that occur with increasing tool wear are discussed. Finally, an approach is presented here to attain improved profile accuracy over the whole tool life of the finishing hob.

159 IMTS 2010 Poised for Manufacturing Resurgence (July 2010)

Manufacturing is a hot topic everywhere these days, what with economic stimulus plans targeting the struggling industry worldwide. Many hopes are tied to a manufacturing recovery to bring us further up out of the economic doldrums of 2007–2008. Most indicators show that manufacturing is climbing back, so what better time for the International Manufacturing Technology Show (IMTS) 2010 to witness first hand the next generation’s technology.

160 Gear Expo 2009 Special Events (September/October 2009)

Details about the Solutions Center, SME and AGMA special events at the show.

161 Helical Gear Mathematics Formulas and Examples (May/June 1988)

The following excerpt is from the Revised Manual of Gear Design, Section III, covering helical and spiral gears. This section on helical gear mathematics shows the detailed solutions to many general helical gearing problems. In each case, a definite example has been worked out to illustrate the solution. All equations are arranged in their most effective form for use on a computer or calculating machine.

162 Helical Gear Mathematics, Formulas and Examples Part II (July/August 1988)

The following excerpt is from the Revised Manual of Gear Design, Section III, covering helical and spiral gears. This section on helical gear mathematics shows the detailed solutions to many general helical gearing problems. In each case, a definite example has been worked out to illustrate the solution. All equations are arranged in their most effective form for use on a computer or calculating machine.

163 Generation of Helical Gears with New Surface Topology by Application of CNC Machines (January/February 1994)

Analysis of helical involute gears by tooth contact analysis shows that such gears are very sensitive to angular misalignment leading to edge contact and the potential for high vibration. A new topology of tooth surfaces of helical gears that enables a favorable bearing contact and a reduced level of vibration is described. Methods for grinding helical gears with the new topology are proposed. A TCA program simulating the meshing and contact of helical gears with the new topology has been developed. Numerical examples that illustrate the proposed ideas are discussed.

164 Postcard from Gear Expo (November/December 2003)

Where were you? We were hoping to see you here at Gear Expo. We were surprised that you didn't make it. Anyway, we had a really good show, along with more than a hundred other leading companies in the gear industry who exhibited this year.

165 High Technology Hobs (January/February 1993)

Today's high technology hobs are visible different from their predecessors. Gear hobs have taken on a different appearance and function with present day technology and tool and material development. This article shows the newer products being offered today and the reasons for investigating their potential for use in today's modern gear hobbers, where cost reduction and higher productivity are wanted.

166 Practical Optimization of Helical Gears Using Computer Software (May/June 1993)

The aim of this article is to show a practical procedure for designing optimum helical gears. The optimization procedure is adapted to technical limitations, and it is focused on real-world cases. To emphasize the applicability of the procedure presented here, the most common optimization techniques are described. Afterwards, a description of some of the functions to be optimized is given, limiting parameters and restrictions are defined, and, finally, a graphic method is described.

167 Gear Expo '93 - A Wise Investment (July/August 1993)

Gear Expo '93 - another trade show, another plea to send people and/or equipment out of town, away from the office or plant. Another bid to spend time, money, and effort. Oh, please! Hasn't anybody heard that these are the "lean and mean" '90s?

168 Maximum Life Spiral Bevel Reduction Design (September/October 1993)

Optimization is applied to the design of a spiral bevel gear reduction for maximum life at a given size. A modified feasible directions search algorithm permits a wide variety of inequality constraints and exact design requirements to be met with low sensitivity to initial values. Gear tooth bending strength and minimum contact ration under load are included in the active constraints. The optimal design of the spiral bevel gear reduction includes the selection of bearing and shaft proportions in addition to gear mesh parameters. System life is maximized subject to a fixed back-cone distance of the spiral bevel gear set for a specified speed ratio, shaft angle, input torque and power. Significant parameters in the design are the spiral angle, the pressure angle, the numbers of teeth on the pinion and gear and the location and size of the four support bearings. Interpolated polynomials expand the discrete bearing properties and proportions into continuous variables for gradient optimization. After finding the continuous optimum, a designer can analyze near-optimal designs for comparison and selection. Design examples show the influence of the bearing lives on the gear parameters in the optimal configurations. For a fixed back-cone distance, optimal designs with larger shaft angles have larger service lives.

169 Innovative Concepts for Grinding Wind Power Energy Gears (June 2009)

This article shows the newest developments to reduce overall cycle time in grinding wind power gears, including the use of both profile grinding and threaded wheel grinding.

170 Every Reason In the World to Go (July/August 1994)

IMTS 94, the Association for Manufacturing Technology's biennial machine tool extravaganza opens September 7 at McCormick Place in Chicago. As always, the size of this show is astonishing. Over 100,000 visitors, enough to populate a medium-size town, will converge on Chicago's lakefront to visit more than 1,200 exhibits spread over the entire McCormick Place complex.

171 The 500 lb. Gorilla in the Window of Opportunity (September/October 1988)

IMTS is back in town, From Sept. 7 through Sept. 15, the largest industrial exhibition in the Western Hemisphere will fill one of the largest exhibition centers in the world. A show of this magnitude is a little like the 500 lb. gorilla in your dining room - hard to ignore.

172 Computers and Automation Lead IMTS Innovations (November/December 1994)

Robots, computers and other signs of high technology abounded at IMTS 94, supporting the claim by many that this was one of the best shows ever. Many of the machines on display had so many robotic attachments and computer gizmos that they looked more like they belonged in some science fiction movie than on the floor of a machine shop.

173 Mechanical Behavior and Microstructure of Ausrolled Surfaces in Gear Steels (March/April 1995)

Ausforming, the plastic deformation of heat treatment steels in their metastable, austentic condition, was shown several decades ago to lead to quenched and tempered steels that were harder, tougher and more durable under fatigue-type loading than conventionally heat-treated steels. To circumvent the large forces required to ausform entire components such as gears, cams and bearings, the ausforming process imparts added mechanical strength and durability only to those contact surfaces that are critically loaded. The ausrolling process, as utilized for finishing the loaded surfaces of machine elements, imparts high quality surface texture and geometry control. The near-net-shape geometry and surface topography of the machine elements must be controlled to be compatible with the network dimensional finish and the rolling die design requirements (Ref. 1).

174 Gear Oil Classification and Selection (May/June 1995)

Today gear drive operations have several options when selecting the proper lubricant for their gearboxes. As in the past, the primary lubricant used for gearbox lubrication is mineral oil. But with the advances in technology, synthetic hydrocarbons (PAOs) and polyglycols show very specific advantages in certain applications. With gear drives becoming more and more precise, it is now also to the benefit of the gear operator to verify that he or she has the proper additive package and viscosity in the lubricant selected. Fig. 1 shoes that a gear oil is a combination of a base oil and specific additives. The base oils can be either mineral oil, a synthetic or even in some cases a combination of the two.

175 The Case of This Issue's Column (September/October 1995)

221B Baker Street We've always said that gears show up in all the best places, even, it turns out, among the papers of that most famous of detectives, Sherlock Holmes. "The Adventure of the Engineer's Thumb" is, according to Dr. Watson, a case "so strange in its inception and so dramatic in its details," that it merits a mention even in our exalted pages.

176 Gear Inspection For The Long Haul (September/October 1995)

Question: We just received permission to purchase our first CNC gear inspection system. With capital approvals so hard to come by, especially for inspection equipment, I want to be sure to purchase a system I can count of for years to come. My past experience with purchasing CNC equipment has shown me that serviceability of the computer and the CNC controller portion of the system can be a problem in just a few years because of the obsolescence factor. What information do I need to look for when selecting a supplier to reduce the risk of obsolescence, as well as to reduce the long-term servicing costs in the computer and controls portion of the system?

177 Low Loss Gears (June 2007)

In most transmission systems, one of the main power loss sources is the loaded gear mesh. In this article, the influences of gear geometry parameters on gear efficiency, load capacity, and excitation are shown.

178 Top 10 Reasons You Should Go to Gear Expo 2009 (August 2009)

Let's face it. It's been a bummer of a summer economically speaking. Here's why you should still go to the show.

179 Explore "The World of Gearing" in Detroit (July/August 1991)

AGMA's Gear Expo '91, "The World of Gearing," opens October 20 and runs through October 23 at the Cobo Conference & Exhibition Center in "The Heart of the Manufacturing Industry," Detroit, MI. Gear Expo '91 is "the largest trade show ever specifically organized for the gear industry," according to Rich Norment, AGMA's Executive Director.

180 AGMA, ISO, and BS Gear Standards Part II - Pitting Resistance Ratings (January/February 1991)

In Part I differences in pitting ratings between AGMA 218, the draft ISO standard 6336, and BS 436:1986 were examined. In this part bending strength ratings are compared. All the standards base the bending strength on the Lewis equation; the ratings differ in the use and number of modification factors. A comprehensive design survey is carried out to examine practical differences between the rating methods presented in the standards, and the results are shown in graphical form.

181 Compter-Aided Spur Gear Tooth Design: An Application-Driven Approach (November/December 1989)

This article discusses an application driven approach to the computer-aided sizing of spur gear teeth. The methodology is bases on the index of tooth loading and environment of application of the gear. It employs handbook knowledge and empirical information to facilitate the design process for a novice. Results show that the approach is in agreement with the textbook data. However, this technique requires less expert knowledge to arrive at the conclusion. The methodology has been successfully implemented as a gear tooth sizing module of a parallel axis gear drive expert system.

182 The Elementary Theory for the Synthesis of Constant Direction Pointing Chariots (or Rotation Neutralizers) (November/December 1988)

The south-pointing chariot exhibited at the Smithsonian Institution, Washington, D.C., (circa 2600 BC)is shown in Fig. 1. Although the mechanism is ancient, it is by no means either primitive or simplistic. The pin-tooth gears drive a complex system, wherein the monk on the top of the chariot continues to point in a preset direction, no matter what direction the vehicle in moved, without a slip of the wheels.(1)

183 Fillet Geometry of Ground Gear Teeth (January/February 1989)

This article investigates fillet features consequent to tooth grinding by generating methods. Fillets resulting from tooth cutting and tooth grinding at different pressure angles and with different positions of grinding wheel are compared. Ways to improve the final fillet of the ground teeth with regard to tooth strength and noise, as well as the grinding conditions, are shown. "Undergrinding" is defined and special designs for noiseless gears are described.

184 Factors Influencing Fracture Toughness of High-Carbon Martensitic Steels (January/February 1989)

Plane strain fracture toughness of twelve high-carbon steels has been evaluated to study the influence of alloying elements, carbon content and retained austenite. The steels were especially designed to simulate the carburized case microstructure of commonly used automotive type gear steels. Results show that a small variation in carbon can influence the K IC significantly. The beneficial effect of retained austenite depends both on its amount and distribution. The alloy effect, particularly nickel, becomes significant only after the alloy content exceeds a minimum amount. Small amounts of boron also appear beneficial.

185 The Design and Manufacture of Plastic Gears Part II (July/August 1985)

Advancements in machining and assembly techniques of thermoplastic gearing along with new design data has lead to increased useage of polymeric materials. information on state of the art methods in fabrication of plastic gearing is presented and the importance of a proper backlash allowance at installation is discussed. Under controlled conditions, cast nylon gears show 8-14 dBA. lower noise level than three other gear materials tested.

186 Windpower 2009 Relocates in Light of Record Growth (January/February 2009)

It’s not too often a trade show so far surpasses organizers’ expectations for size that it must be relocated. This was just the dilemma the American Wind Energy Association (AWEA) faced with the Windpower 2009 Conference and Exhibition, which was originally scheduled to take place in Minneapolis, but will now be held at McCormick Place, Chicago.

187 Looking To The Future - Part II (November/December 1990)

Beginning with our next issue, some of the promised changes in format for Gear Technology will begin showing up in these pages. As part of our commitment to provide you with important information about the gear and gear products industry, we are expanding our coverage. In addition to continuing to publish some of the best results of gear research and development throughout the world, we will be adding special columns covering vital aspects of the gearing business.

188 IMTS 2004: Recovery in the Gear Pavilion (November/December 2004)

Tom Lang liked what he saw in the Gear Generation Pavilion at IMTS 2004. Standing in his booth, Kapp Technologies’ vice president/general manager talked with many attendees during the show and afterward said: “We had an increase of both quality and quantity of visitors.”

189 Renaissance Man (January/February 2004)

I lost a good friend in October—one that many of you might know. Carlo Costi of Sogimex S.A.S. in Caponago (Milano), Italy, came out of the EMO show in Milan on October 28, caught a taxi and called his wife, Mariella, to tell her that he wasn’t feeling well. He died—in the taxi—on the phone—talking to his wife. He was 60 years old.

190 FZG Rig-Based Testing of Flank Load-Carrying Capacity Internal Gears (June/July 2012)

Micropitting, pitting and wear are typical gear failure modes that can occur on the flanks of slowly operated and highly stressed internal gears. However, the calculation methods for the flank load-carrying capacity have mainly been established on the basis of experimental investigations of external gears. This paper describes the design and functionality of the newly developed test rigs for internal gears and shows basic results of the theoretical studies. It furthermore presents basic examples of experimental test results.

191 Comparative Load Capacity Evaluation of CBN-Finished Gears (May/June 1990)

Cubic boron nitride (CBN) finishing of carburized gearing has been shown to have certain economic and geometric advantages and, as a result, it has been applied to a wide variety of precision gears in many different applications. In critical applications such as aerospace drive systems, however, any new process must be carefully evaluated before it is used in a production application. Because of the advantages associated with this process, a test program was instituted to evaluate the load capacity of aerospace-quality gears finished by the CBN process as compared to geometrically identical gears finished by conventional grinding processes. This article presents a brief description of the CBN process, its advantages in an aerospace application, and the results of an extensive test program conducted by Boeing Helicopters (BH) aimed at an evaluation of the effects of this process on the scoring, surface durability, and bending fatigue properties of spur gears. In addition, the results of an x-ray diffraction study to determine the surface and subsurface residual stress distributions of both shot-peened and nonshot-peened CBN-ground gears as compared to similar conventionally ground gears are also presented.

192 IMTS 1990 Coming To Chicago (July/August 1990)

IMTS-90 - the Western Hemisphere's largest trade show - is coming to Chicago September 5 -13, 1990. The event, sponsored by NMTBA - The Association For Manufacturing Technology - will be held at the McCormick Place Complex. Over 1200 exhibitors will display their products at this event.

193 Influence of Lubrication on Pitting and Micropitting Resistance of Gears (March/April 1990)

Pitting and micropitting resistance of case-carburized gears depends on lubricants and lubrication conditions. Pitting is a form of fatigue damage. On this account a short time test was developed. The test procedure is described. The "pitting test" was developed as a short time test to examine the influence of lubricants on micropitting. Test results showing the influence of case-carburized gears on pitting and micropitting are presented.

194 Connect with Global Technology at IMTS 2008 (September/October 2008)

The International Manufacturing Technology Show has come a long way from the National Machine Tool Builders’ Exposition fi rst held in 1927.

195 Exhibitors Prepare for the Biggest IMTS Ever (July/August 1998)

IMTS Show Coverage for 1998.

196 Gears With Ears (March/April 2001)

When you're manufacturing fun, very often you need gears. The Addendum team recently went on a behind-the-scenes gear-finding mission with Jerold S. Kaplan, Principal Engineer, Show/Ride Mechanical Engineering at Walt Disney Imagineering in Lake Buena Vista, FL. We found that at least part of Disney's magic comes from good, old-fashioned mechanical engineering.

197 IMTS 1986 - The World of Manufacturing Technology (July/August 1986)

September 3-11 the 1986 International Machine Tool Show, "The World of Manufacturing Technology", will be held at the McCormick Place Exposition Center in Chicago. More that 1000 exhibits from over thirty countries are planned. These exhibits will present a complete range of machine-tool products from 2-story high presses to complete manufacturing systems, lathes, lasers, CAD/CAM systems and robotics.

198 More IMTS Stuff (September/October 2002)

Student Summit Introduces Next Generation to Manufacturing The IMTS 2002 Show offers an opportunity for students, ranging from grade school to college, to take part in the exhibition.

199 Technical Calendar (May/June 1989)

May 18-21. AGMA Annual Meeting, "The Changing World of Gears." Loews Ventana Canyon Resort, Tucson, AZ. July 12-14, 1989. ASM international Conference on Carburizing. Sheraton Hotel & Conference Center, Lakewood, CO. September 12-20, 1989. European Machine Tool Show, Hannover, West Germany.

News Items About show

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14 BHS Rotor Turning Gears Showcased at PowerGen Europe (June 13, 2007)
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18 AMB Sets Bar High for 2012 Trade Show (April 1, 2011)
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19 Hardinge Machine Technology Show a Success (July 9, 2012)
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20 Titan Completes Road Shows in Arizona and California (May 12, 2010)
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21 EMO Hannover to Showcase Tool Innovations (February 21, 2013)
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22 AMT to Showcase Technologies at FEIMAFE 2013 (May 16, 2013)
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28 PTG to Showcase Absolute Precision at CIMT 2015 (March 10, 2015)
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35 Ondrives Manufactures Showcase Gearboxes (April 17, 2006)
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