scope:

This information sheet provides a method for calculating the pitting resistance and bending strength of hypoid gears using the procedures of ANSI/AGMA 2003-B97.

Rating formulas

The knowledge and judgment required to evaluate the various rating factors come from years of accumulated experience in designing, manufacturing and operating gear units. Empirical factors given in this document are general in nature. AGMA application standards may use other empirical factors that are more closely suited to the particular field of application. This document is intended for use by the experienced gear designer, capable of selecting reasonable values for the factors. It is not intended for use by the engineering public at large.

Exceptions

The exceptions in clause 1.2 of ANSI/AGMA 2003-B97 apply for hypoid gears. Lengthwise sliding in hypoids reduces their efficiency. Torque losses between driving pinion and gear range from 2 to 15 percent depending on the offset, spiral angles, velocity and lubrication. The equations neglect and lubrication. The equations neglect efficiency. The user can adjust input or output to account for losses.