.jpg)
Historical
AGMA 918-A93 (R2015)
A Summary of Numerical Examples Demonstrating the Procedures for Calculating Geometry Factors for Spur and Helical Gears
This AGMA information sheet and related publications are based on typical or average data, conditions, or application. This information sheet, AGMA 918-A93, was prepared to assist designers in the proper use and interpretation of AGMA 908-B89 and to assist in the development of computer programs when calculating geometry factors for pitting resistance, I, and bending strength, J. A flow chart provides a step by step procedure for the calculation of these factors, either manually or by computer program. Several examples are provided to demonstrate the calculation procedure for the various characteristics of geometry as described in AGMA 908-B89. These include accurate and inaccurate spur gears, conventional and LACR helical gears, internal and external gears, double helical and herringbone (Sykes) gears, and addendum modifications. The calculation of J-factor for internal gears is not defined in AGMA 908-B89 and, therefore, is not covered in this information sheet. A tabulation of all calculated variables is provided for each example based on its design criteria. This provides the designer with known results to check against when calculating or programming these factors.
Content Provider
American Gear Manufacturers Association [agma]
