November/December 2010

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Publisher's Page

The Slow Climb

Publisher Michael Goldstein talks about the slow but steady pace of the recovery of the manufacturing economy.

Voices

The AGMA Brand

AGMA Chairman David Ballard discusses what it means to be an AGMA member.

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.

Feature Articles

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.

Addendum

Gear Faces in Unlikely Places

The Addendum team uncovers gear industry bigwigs caught by the paparazzi on the covers of OTHER magazines.

Product News

Cylkro Face Gears

Dutch design and Swiss ingenuity cause transmission breakthrough. Updated examples of Cylkro face gears in action.

Product News

The complete Product News section 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.

Events

Technically Speaking, a Huge Success

A recap of the AGMA 2010 Fall Technical Meeting.

Calendar

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