In a previous article, the authors identified two misconceptions surrounding gear superfinishing. Here, they tackle three more.

Superfinishing the working surfaces of gears and their root fillet regions results in performance benefits.

In conventional gear grinders, grinding wheels with Alundum grains and a hardness of about 2000 HV have been used for finishing steel gears with hardnesses up to about 1000HV. In this case, the accuracy of the gears ground is greatly affected by wear of the grinding wheel because the difference in hardness is comparatively small when the gears are fully hardened.