June 2014

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Feature Articles

The Past, Present and Future of Gear Manufacturing
The gear industry is full of storytellers. It's a niche market that boasts a remarkable cast of characters that have been sharing their stories with us for 30 years. In that time, the editors and staff of Gear Technology magazine have had the privilege to report the ins and outs of this highly-specialized industry. From technical articles to case studies and features, the main focus of this magazine has been to "provide a forum of discovery and innovation for you, the gear manufacturing industry." Our Publisher, Michael Goldstein, said as much in our inaugural issue of May/June 1984.

30 Years of Calculation
Examining the history of software in mechanical engineering

Technical Articles

Calculation of Tooth Root Load Carrying Capacity of Beveloid Gears
In this paper, two developed methods of tooth root load carrying capacity calculations for beveloid gears with parallel axes are presented, in part utilizing WZL software GearGenerator and ZaKo3D. One method calculates the tooth root load-carrying capacity in an FE-based approach. For the other, analytic formulas are employed to calculate the tooth root load-carrying capacity of beveloid gears. To conclude, both methods are applied to a test gear. The methods are compared both to each other and to other tests on beveloid gears with parallel axes in test bench trials.

Gear Ratio Epicyclic Drives Analysis
It has been documented that epicyclic gear stages provide high load capacity and compactness to gear drives. This paper will focus on analysis and design of epicyclic gear arrangements that provide extremely high gear ratios. Indeed, a special, two-stage planetary arrangement may utilize a gear ratio of over one hundred thousand to one. This paper presents an analysis of such uncommon gear drive arrangements and defines their major parameters, limitations, and gear ratio maximization approaches. It also demonstrates numerical examples, existing designs, and potential applications.


Proverbs (Publishers Page)
Publisher Michael Goldstein describes what it means to him that Gear Technology is celebrating its 30th anniversary.

GT Extras (GT Extras)
The latest video from Koepfer America, Sandvik's Gear Up event and IMTS product previews

Inspiring the World Beyond the Theory of Gearing (Voices)
Celebrating Dr. Faydor Litvin: Remarkable Scientist, Dedicated Mentor, Continuing Inspiration

Product News (Product News)
The complete Product News section from the June 2014 issue of Gear Technology.

Measuring Backlash in Bevel and Hypoid Gears (Ask the Expert)
In this installment of Ask the Expert, Dr. Stadtfeld describes the best methods for measuring backlash in bevel gears.

AGMA Recognizes Member Achievements at Annual Meeting (Events)
The AGMA/ABMA Annual Meeting took place April 10-12 in St. Petersburg, Florida. Between committee meetings, networking opportunities and social events, many individuals in the gear industry were presented awards.

Calendar (Events)
The complete Technical Calendar from the June 2014 issue of Gear Technology.

Industry News (Industry News)
The complete Industry News section from the June 2014 issue of Gear Technology.

Orwell Inc. Promises All Things Optimistic with the BBMS (Addendum)
The Addendum team thought it fitting to celebrate George Orwell's 1984 with the 30th Anniversary of Gear Technology. We do not condone the extreme tactics discussed in this fictional press release unless instructed by the proper authorities.