After posting about the difficulty in keeping my “inner engineer” under control outside the workplace, several readers admitted to the same troub...

One of the perks of being a “public” gear person is the opportunity to interact with interesting people in and around our industry. Gear Techno...

I have a lot of books. Like old friends, they sit on shelves and in boxes waiting for me to need them. It has been pointed out to me that books are...

In order to properly select a grease for a particular application, a sound knowledge of the influence of different grease components and operating conditions on the lubrication supply mechanism and on different failure modes is of great benefit.

How does one perform a contact analysis for worn gears? Our expert responds.

Minimizing gear losses caused by churning, windage and mesh friction is important if plant operating costs and environmental impact are to be minimized. This paper concentrates on mesh friction losses and associated scuffing risk. It describes the preliminary results from using a validated, 3-D Finite Element Analysis (FEA) and Tooth Contact Analysis (TCA) program to optimize cylindrical gears for low friction losses without compromising transmission error (TE), noise and power density. Some case studies and generic procedures for minimizing losses are presented. Future development and further validation work is discussed.

The complete Product News section from September/October 2006.

This article reviews mathematical models for individual components associated with power losses, such as windage, churning, sliding and rolling friction losses.