Gears with a diametral pitch 20 and
greater, or a module 1.25 millimeters
and lower, are called fine-pitch or low-module gears. The design of these gears has its own specifics.
Audits of the heat treating department
are a vital part of any good quality program - either as part of a self-assessment or ISO program for a captive shop or - of equal importance - as part of an evaluation of the capabilities of a commercial heat treat supplier. In either case, the audit process needs to be formal in nature and follow specific guidelines.