November/December 2010

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State of the Gear Industry 2010

State of the Gear Industry 2010
Results of Gear Technology research on trends in employment, outsourcing, machine tool investment and other gear industry business practices.

Technical Articles

Zerol Bevel Gears: Tribology Aspects in Angular Transmission Systems, Part III
Zerol bevel gears are the special case of spiral bevel gears with a spiral angle of 0°. They are manufactured in a single-indexing face milling process with large cutter diameters, an extra deep tooth profile and tapered tooth depth.

Gear Fault Detection Effectiveness as Applied to Tooth Surface Pitting Fatigue Damage
A study was performed to evaluate fault detection effectiveness as applied to gear-tooth pitting-fatigue damage. Vibration and oil-debris monitoring (ODM) data were gathered from 24 sets of spur pinion and face gears run during a previous endurance evaluation study.

The Effect of Straight-Sided Hob Teeth
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.


The Slow Climb (Publishers Page)
Publisher Michael Goldstein talks about the slow but steady pace of the recovery of the manufacturing economy.

The AGMA Brand (Voices)
AGMA Chairman David Ballard discusses what it means to be an AGMA member.

Cylkro Face Gears (Product News)
Dutch design and Swiss ingenuity cause transmission breakthrough. Updated examples of Cylkro face gears in action.

Product News (Product News)
The complete Product News section from the November/December 2010 issue of Gear Technology.

Technically Speaking, a Huge Success (Events)
A recap of the AGMA 2010 Fall Technical Meeting.

Calendar (Events)
The complete Technical Calendar from the November/December 2010 issue of Gear Technology

Industry News (Industry News)
The complete Industry News section from the November/December 2010 issue of Gear Technology.

Gear Faces in Unlikely Places (Addendum)
The Addendum team uncovers gear industry bigwigs caught by the paparazzi on the covers of OTHER magazines.