A reader asks: We are currently revising our gear standards and tolerances and a few questions with the new standard AGMA 2002-C16 have risen. Firstly, the way to calculate the tooth thickness tolerance seems to need a "manufacturing profile shift coefficient" that isn't specified in the standard; neither is another standard referred to for this coefficient. This tolerance on tooth thickness is needed later to calculate the span width as well as the pin diameter. Furthermore, there seems to be no tolerancing on the major and minor diameters of a gear.

One of the reoccurring themes in our “origin stories” project is the willingness of people to school us in the sometimes confusing world of gears. ...

Two different high-profile news stories have really flipped my “curmudgeon” switch this week. It irritates me that the general public is distracted...

I was attending the University of Cincinnati in the college of engineering. After my freshman year in 1960, I started my co-op job with the Cincinn...

In many gear transmissions, tooth load on one flank is significantly higher and is applied for longer periods of time than on the opposite one; an asymmetric tooth shape should reflect this functional difference. The advantages of these gears allow us to improve the performance of the primary drive tooth flanks at the expense of the opposite coast flanks, which are unloaded or lightly loaded during a relatively short work period by drive flank contact and bending stress reduction. This article is about the microgeometry optimization of the spur asymmetric gears’ tooth flank profile based on the tooth bending and contact deflections.

Higher Quality Internal Gears

Zoller Inc. has a new digital playground in Ann Arbor, Michigan. The tooling, inspection and tool management company now has 44,000+ sq. ft. of spa...

Material Grade in Gears