November/December 2015

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Feature Articles

2015 State of the Gear Industry
From the Economics to 4.0 β€” Industry Leaders Have Their Say

2015 State of the Gear Industry Reader Survey
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.

Buyers Guide
The 2015 Gear Technology Buyers Guide was compiled to provide you with a handy resource containing the contact information for significant suppliers of machinery, tooling, supplies and services used in gear manufacturing.

Technical Articles

Development of Usable Bevel Gearset with Length and Profile Crowning
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.

Knowing When Enough Is Enough
Detection of impending gear tooth failure is of interest to every entity that utilizes geared transmissions. However, it is of particular significance at the Gear Research Institute (GRI), where sponsored efforts are conducted to establish gear material endurance limits, utilizing gear fatigue tests. Consequently, knowing when a gear is about to fail in each and every test, in a consistent manner, is essential for producing reliable and useful data for the gear industry.

Process Model for Honing Larger Gears
Hard finishing technology, e.g. β€” honing β€” 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.

Departments

Meeting of the Minds (Publishers Page)
One of the great benefits of Gear Expo for us here at Gear Technology is the opportunity to meet faceto-face with many of the people who, in one way or another, contribute to our success throughout the year. After all, our success is dependent almost entirely on information and the people who provide it. These contributors include researchers at top technical universities, the heads of technology at major gear industry corporations, independent consultants with decades of gear industry experience, members and volunteers at leading industry organizations like the AGMA, our technical editors and others.

Product News (Product News)
News about recent products

Calendar (Events)
Calendar of Events

Industry News (Industry News)
Latest news from around the industry

Mekanizmalar! (Addendum)
Mekanizmalar. Ever heard of it? No, it’s not a lost password from 1,001 Arabian Nights. In fact it is a website β€” since 2004 β€” that employs the universally loved art of animation (Adobe Flash) to clearly explain the basic and not-so-basic workings of mechanisms β€” including geared, pneumatic, hydraulic and electronic components.