TRATTAMENTO CHIMICO DI SCANALATURE ELICOIDALI IN UN DISPOSITIVO DI AVVIAMENTO.

摘要

An output shaft (4) outputs the rotation force of a motor (2). A one-way clutch (7) has a barrel fitted on the output shaft to transmit the rotation of the output shaft to a pinion (5). The output shaft and barrel have helical spline portions that engage with each other. At least one of the spline portions on the output shaft and barrel has a chemical conversion coating with microscopic asperities. An Independent claim is also included for a method of a chemical treatment for forming a chemical conversion coating on a surface of a helical spline portion provided in a starter.