This investigation reviews calculations using ISO/TS 6336-22 Method A and Method B, comparing the calculations against field results. Extensive reviews were made of geometry, surface roughness, load conditions, and lubricant conditions to best understand the influences of micropitting on each example and the applicability of the calculations to the results.

In the present paper, a spline-joint design and the extension of a back-to-back test rig were presented, which enable the testing of crowned spline-joints under high rotational speed, medium torque, high test temperature, and angular misalignments.

The newest edition of the Gear Research Institute (GRI) newsletter, “Transmissions” has been published. The technical article included in this edition describes a recent experience where they encountered an unexpected surface quality issue during gear fabrication for one of their single-client projects.