It was brought to my attention that the graphics used in my recent “herringbone” postings actually show double helical gears. I have a great suppor...

      I enjoy watching car auctions on cable television. Some of my enjoyment comes from the commen...

  Has your e-mail inbox been full lately? It is a sure sign that the International Machine Tool Show (IMTS) is rapidly approaching. This ye...

This article is the fourth installment in Gear Technology's series of excerpts from Dr. Hermann J. Stadtfeld's book, Gleason Bevel Gear Technology. The first three excerpts can be found in our June, July and August 2015 issues. In the previous chapter, we demonstrated the development of a face-milled spiral bevel gearset. In this section, an analogue face-hobbed bevel gearset is derived.

[starbox] As the son of a World War II sailor, I was raised with an honest respect for our nation’s veterans. The massive size of WW II and its ...

This presentation introduces a new procedure that - derived from exact calculations - aids in determining the parameters of the validation testing of spiral bevel and hypoid gears in single-reduction axles.

The complete Industry News section from the May 2014 issue of Gear Technology.

Bringing new or improved products to market sooner has long been proven profitable for companies. One way to help shorten the time-to-market is to accelerate validation testing. That is, shorten the test time required to validate a new or improved product.

In the majority of spiral bevel gears, spherical crowning is used. The contact pattern is set to the center of the active tooth flank and the extent of the crowning is determined by experience. Feedback from service, as well as from full-torque bench tests of complete gear drives, has shown that this conventional design practice leads to loaded contact patterns, which are rarely optimal in location and extent. Oversized reliefs lead to small contact area, increased stresses and noise, whereas undersized reliefs result in an overly sensitive tooth contact.