Investigation about the Strength of Plastic Gears : 3rd Report ; Strength of the Nylon Gear meshing with the Steel Gear which was cut by Semitopping Hob

Abstract

When the steel gear meshes with the nylon gear, the advantages are no lubricating operation and low noise. But a deddendum of nylon gear meshes strongly with a corner of tooth crest of steel gear when the nylon gear is a driving gear. This is the principle cause of tooth form transformation, tooth face seizure, abrasion, etc. In this report, for the purpose of eliminating this cause, a load test of nylon gear and steel gear was made. The steel gear was one cut by semitopping hob. Examination of the results confirmed usefulness of the steel gear which had been cut by semitopping hob.