Patent ID: 8517801
Filing Date: 2013-08-27
Classification: F16H

Abstract:
1. A method for producing a pulley for a belt-type continuously variable transmission, a contact surface of the pulley to be brought into contact with an element being formed by machining, the method comprising: a grinding step of forming a shape of the contact surface; a grooving step of roughening the contact surface to form grooves therein; and a contact surface lapping step of lapping the contact surface having the grooves with a lapping film to form oil grooves for holding a lubricant oil, whereby the contact surface is provided with a surface roughness having a maximum height roughness Rz of 4 μm or less, a mean length RSm of the roughness profile elements of 30 to 60 μm, a skewness Rsk of the roughness profile of −2.7 to −0.6 (no unit), a reduced peak height Rpk of 0.09 μm or less, and a reduced valley depth Rvk of 0.4 to 1.3 μm.