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1 Gear Show 4.0 (August 2019)

There have always been plenty of reasons to attend Gear Expo. For decades, it’s been the best place to see all of the technology, vendors and solutions in the gear industry, all under one roof. Now that it's the Motion + Power Technology Expo, it's even more true.

2 Show Stoppers (August 2019)

When you go to MPT Expo, make sure to visit the exhibitors in our special advertising section!

3 MPT Expo is all about Learning (August 2019)

In addition to hundreds of relevant suppliers, Motion+Power Technology Expo (Oct. 15-17 in Detroit) also offers many opportunities for learning.

4 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.

5 Binge Watching for Gearheads (November/December 2017)

We've decided to install a man-cave at our office here at Randall Publications. Comfy chairs, surround sound, flat screen, the works. We're going all out, because we have some important watching to do. But before you get the wrong idea, we're not goofing off and binge-watching Stranger Things. No, we're watching Gear Technology TV.

6 Got Gear Questions - Get Gear Answers (September/October 2017)

Gear Expo 2017 is your best opportunity to expand your knowledge, get answers to your technical questions and solve your toughest manufacturing challenges. The reason is quite simple. Gear Expo provides you with the greatest collection of gear expertise, know-how and experience you can find.

7 Get Smarter at Gear Expo (June 2017)

There are many benefits to attending Gear Expo, but if you're not taking advantage of the educational opportunities, you're missing out.

8 Transferring Tribal Knowledge (March/April 2017)

How do we educate the next generation of gear industry employees, and how do we train the ones we already have?

9 Small-Module Gear Design (November/December 2014)

Gears with a diametral pitch 20 and greater, or a module 1.25 millimeters and lower, are called fine-pitch or low-module gears. The design of these gears has its own specifics.

10 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.

11 Industry News (September/October 2014)

The complete Industry News section from the September / October 2014 issue of Gear Technology.

12 2013 State of the Gear Industry (November/December 2013)

Gear Technology’s annual State-of- the-Gear-Industry survey polls gear manufacturers about the latest trends and opinions relating to the overall health of the gear industry. As in years past, the survey was conducted anonymously, with invitations sent by e-mail to gear manufacturing companies around the world.

13 US Gear Industry Doing Well, but Challenges Await (November/December 2013)

If you are like most navigators of the printed page, the first thing you read in this final 2013 issue of Gear Technology was our State of the Gear Industry Survey. And who would blame you? It’s not Sabermetrics, but once you’ve read it you’ll have a pretty clear snapshot of last year and a peek into the next. But if you also like to get a little closer to the bone about things, what follows are the collected opinions of five well-regarded people in the gear industry speaking to a number of issues with relevance.

14 Step Right Up and Have Your Fortune Told (November/December 2014)

Most companies spend this time of year crystal ball gazing. Managers want to know the future so they can make projections, plan schedules, determine budgets and make major decisions that will ensure their success.

15 2015: MORE OF THE SAME (November/December 2014)

From a technological perspective, there typically aren't many EUREKA! breakthroughs in the "state of the gear industry" to report, and 2014 was really no different.

16 2014 State of the Gear Industry (November/December 2014)

Gear Technology's annual State-of-the-Gear-Industry survey polls gear manufacturers about the latest trends and opinions relating to the overall health of the gear industry.

17 The Basics of Gear Theory (June 2015)

Beginning with our June Issue, Gear Technology is pleased to present a series of full-length chapters excerpted from Dr. Hermann J. Stadtfeld’s latest scholarly — yet practical — contribution to the gear industry — Gleason Bevel Gear Technology. Released in March, 2014 the book boasts 365 figures intended to add graphic support of a better understanding and easier recollection of the covered material.

18 2015 State of the Gear Industry (November/December 2015)

From the Economics to 4.0 — Industry Leaders Have Their Say

19 Our Next Leader (November/December 2016)

No, not that president! I mean Matt Croson, the new president of the American Gear Manufacturers Association, who started in June and has been busy getting to know the gear industry and AGMA's members.

20 Gear Expo 2017 and ASM Heat Treat 2017 Booth Previews (September/October 2017)

The latest technology on display in Columbus, OH. October 24-26.

21 2017 State of the Gear Industry (January/February 2017)

Gear Technology's annual State of the Gear Industry survey polls gear manufacturers about the latest trends and opinions relating to the overall health of the gear industry.

22 Slow and Steady (January/February 2017)

The results of our Annual State of the Gear Industry Survey (See page 26) provided insight on 2016 as well as forecasts for 2017. Here is additional insight from some of the industry's leaders.

23 Ask Not What Your Heat Treater Can Do for You... (July 2017)

When sending gears to be heat treated, manufacturers can end up unwittingly making mistakes that slow down turnaround time. We talked to some heat treaters to get their best advice on how you can help them help you.

24 Gear Expo Showstoppers (August 2017)

Special Advertising Section featuring Gear Expo exhibitors.

25 2012 State of the Gear Industry (November/December 2012)

Gear Technology’s annual state-of-the-gear-industry survey polls gear manufacturers about the latest trends and opinions relating to the overall health of the gear industry. As in years past, the survey was conducted anonymously, with invitations sent by e-mail to gear manufacturing companies around the world.

26 ExxonMobil on Benefits of Synthetic Gear Oils (September/October 2017)

Base oils play an important role in determining the performance of an industrial gear oil. They influence characteristics such as low temperature performance, biodegradability, energy efficiency and high temperature thermal and oxidative stability.

27 We'd Grow Faster If We Could (January/February 2018)

It's probably no surprise to anyone that the majority of the gear industry had a pretty good year in 2017, and that most gear manufacturers are expecting a pretty good 2018 as well. After all, most major economic indicators - including the ones that focus on the manufacturing sector - have been positive for some time.

28 2018 State of the Gear Industry (January/February 2018)

Results from our annual survey of gear manufacturers reveal that business is good, but the skilled labor situation is not.

29 The Three Rs of Gearbox Repair: Repair, Refurbish, Replace (August 2018)

"If it ain't broke, don't fix it," goes the hoary bromide. But what if the time comes - and it most surely will - that in fact it is broke? Do you fix it or replace it? And when does gearbox maintenance and repair arrive at a point of diminishing returns and buying new is the answer?

30 Lively New Book on what Distinguishes Manufacturing Precision from Perfection (August 2018)

Most of us would agree that the idea of a perfect world is absurd. Just for starters, who gets to decide what perfect means? "The Perfectionists" by Simon Winchester explores this theme as it relates to engineering.

31 Gravy Training (January/February 2019)

We’ve just come off a very strong year for gear manufacturing, and most of you are looking forward to another good year in 2019. At least, that’s what the results of our annual State-of-the-Gear-Industry survey tell us.

32 2019 State of the Gear Industry (January/February 2019)

Overall, the gear industry enjoyed a very strong 2018, and the optimism expressed by survey respondents is the highest in recent years. When asked about their optimism regarding their companies’ ability to compete over the next five years, 85.8% of respondents indicated some level of optimism.

33 Measured Optimism (November/December 2013)

Gear manufacturers are generally an optimistic bunch, as revealed by our 2013 State-of-the-Gear-Industry Survey, which appears in this issue.

34 Involutometry (September/October 1988)

Involute Curve Fundamentals. Over the years many different curves have been considered for the profile of a gear tooth. Today nearly every gear tooth uses as involute profile. The involute curve may be described as the curve generated by the end of a string that is unwrapped from a cylinder. (See Fig. 1) The circumference of the cylinder is called the base circle.

35 Vegetable-Based Oil as a Gear Lubricant (July/August 2003)

Universal tractor transmission oil (UTTO) is multifunctional tractor oil formulated for use in transmissions, final drives, differentials, wet brakes, and hydraulic systems of farm tractors employing a common oil reservoir. In the present work, the gear protection properties of two formulated vegetable-based UTTO oils, one synthetic ester-based UTTO oil, one synthetic ester gear oil, and one mineral based UTTO oil are investigated.

36 Got Lean, Six Sigma - Here's Another Theory (March/April 2009)

Most readers are at least familiar with continuous improvement programs such as lean and six sigma. Perhaps your shop or company is well along in the implementation of one or the other—if not both. But what about theory of constraints (TOC), introduced in Dr. Eliyahu Goldratt’s 1984 book, The Goal? Despite its rather negative-sounding name, this continuous improvement process has much to offer manufacturers of all stripes. And when combined with lean and six sigma, the results can be dramatic. Dr. Lisa Lang, a TOC consultant and speaker, explains why and how in the following Q&A session with Gear Technology.

37 Fallen Leaves (November/December 2009)

Publisher Michael Goldstein reflects on the recent passing of several gear industry friends and associates.

38 Gear Milling on Non-Gear Dedicated Machinery (July 2009)

Imagine the flexibility of having one machine capable of milling, turning, tapping and gear cutting with deburring included for hard and soft material. No, you’re not in gear fantasy land. The technology to manufacture gears on non gear-dedicated, mult-axis machines has existed for a few years in Europe, but has not yet ventured into mainstream manufacturing. Deckel Maho Pfronten, a member of the Gildemeister Group, took the sales plunge this year, making the technology available on most of its 2009 machines.

39 Gears In Sneakers (September/October 1997)

Move over, Michael Jordan. While the Addendum staff is as proud as any other Chicagoans of our unbeata-Bulls, we confess to a soft spot in our hearts for the hometown's other championship basketball team: The Chicago American Gears.

40 Producing Large-Sized, Skew Bevel Gear Pinion Using Multi-Axis Control and Multi-Tasking Machine Tool (March/April 2013)

This paper proposes a method for the manufacture of a replacement pinion for an existing, large-sized skew bevel gear using multi-axis control and multitasking machine tool.

41 The Quest for the All-in-One Machine (January/February 2019)

Multitasking machines have a pretty clear sales pitch: They can do what you need them to and make a gear, but if you’re a job shop with fingers in a lot of pies, you can also use them for anything else you might need to make. Hobbing, cutting, milling, now even gear skiving; if it’s a cutting process, a multitasking machine can probably do it.

42 Thermal Behavior of Helical Gears (May 2007)

An experimental effort has been conducted on an aerospace-quality helical gear train to investigate the thermal behavior of the gear system as many important operational conditions were varied.

43 State of the Gear Industry 2008 (November/December 2008)

Results of research on trends in employment, outsourcing, machine tool investment and other gear industry business practices.

44 Clogged Supply Chain Has Gear Manufacturers in Hurry Up and Wait Mode (November/December 2008)

Never have so few served so many. That, in essence, describes gear makers and the role they play in our world. Think of it—although the gear cutting industry represents much less than one percent of the global workforce—the gears it produces are what make things run in practically every industry and profession imaginable. From bulldozers to Rolexes, gears are an integral part of the mix.

45 Service Behavior of PVD-Coated Gearing Lubricated with Biodegradable Synthetic Ester Oils (January/February 2004)

The following article is concerned with the analysis of the wear-reducing effect of PVD-coatings in gearings. Standardized test methods are used, which under near-real conditions enable statements to be made about the different forms of damage and wear (micropitting, macropitting, scuffing).

46 Mystery Solved (November/December 2008)

Readers respond with their own crazy ideas about the mystery gear on the mountain featured in September/October 2008's Addendum column.

47 State of the Gear Industry 2009 (November/December 2009)

In October, Gear Technology conducted an anonymous survey of gear manufacturers. Invitations were sent by e-mail to thousands of individuals around the world. More than 300 individuals responded to the online survey, answering questions about their manufacturing operations and current challenges facing their businesses.

48 Development of Gear Technology and Theory of Gearing (July/August 1999)

I must admit that after thumbing through the pages of this relatively compact volume (113 pages, 8.5 x 11 format), I read its three chapters(theory of gearing, geometry and technology, and biographical history) from rear to front. It will become obvious later in this discussion why I encourage most gear engineers to adopt this same reading sequence!

49 State of the Gear Industry 2007 (November/December 2007)

Results of research on trends in employment, outsourcing, machine tool investment and other gear industry business practices.

50 Tribology Aspects in Angular Transmission Systems, Part 1 (August 2010)

"General Explanations on Theoretical Bevel Gear Analysis" is part 1 of an eight-part series from Gleason's Dr. Hermann Stadtfeld.

51 State of the Gear Industry 2010 (November/December 2010)

Results of Gear Technology research on trends in employment, outsourcing, machine tool investment and other gear industry business practices.

52 Worm Gears - Higher Energy Efficiency and Less Strain on Resources (May 2011)

A very direct and effective way of increasing power transmission efficiency is a changeover from mineral-oil-based lubricants to synthetic lubricants.

53 State of the Gear Industry 2011 (November/December 2011)

In November, Gear Technology conducted an anonymous survey of gear manufacturers. Invitations were sent by e-mail to thousands of individuals around the world. More than 300 individuals responded to the online survey, answering questions about their manufacturing operations and current challenges facing their businesses.

54 Helical Gears With Circular Arc Teeth: Simulation of Conditions of Meshing and Bearing Contact (July/August 1987)

Circular arc helical gears have been proposed by Wildhaber and Novikov (Wildhaber-Novikov gears). These types of gears became very popular in the sixties, and many authors in Russia, Germany, Japan and the People's Republic of China made valuable contributions to this area. The history of their researches can be the subject of a special investigation, and the authors understand that their references cover only a very small part of the bibliography on this topic.

55 Contact Surface Topology of Worm Gear Teeth (March/April 1988)

Among the various types of gearing systems available to the gear application engineer is the versatile and unique worm and worm gear set. In the simpler form of a cylindrical worm meshing at 90 degree axis angle with an enveloping worm gear, it is widely used and has become a traditional form of gearing. (See Fig. 1) This is evidenced by the large number of gear shops specializing in or supplying such gear sets in unassembled form or as complete gear boxes. Special designs as well as standardized ratio sets covering wide ratio ranges and center distanced are available with many as stock catalog products.

56 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.

57 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.

58 Involutometry Illustrations (November/December 1988)

In our last issue, the labels on the drawings illustrating "Involutometry" by Harlan Van Gerpan and C. Kent Reece were inadvertently omitted. For your convenience we have reproduced the corrected illustrations here. We regret any inconvenience this may have caused our readers.

59 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.

60 State of the Gear Industry Special Edition (January/February 2019)

Gear industry experts give their opinions about the most important trends facing gear manufacturers today.