Patent ID: 6402658
Filing Date: 2002-06-11
Classification: C22C,F16H

Abstract:
A toroidal type continuously variable transmission including at least one input disc having a raceway of a concavely curved surface in a radial direction of one side of the input disc, an output disc having a raceway of a concavely curved surface in a radial direction of one side of the output disc placed in opposition to the raceway of the input disc, and a roller transmitting a power from the input disc to the output disc while keeping in frictional contact with both the raceway of the input disc and the raceway of the output disc, whereinat least one of the disc and the roller is made of a heat-resisting bearing steel which contains: C of both 0.8 wt % or more and 1.5 wt % or less; Si of both 0.5 wt % or more and 2.0 wt % or less; Mn of both 0.3 wt % or more and 2.0 wt % or less; Cr of both 1.3 wt % or more and 1.98 wt % or less; Mo of both 0.3 wt % or more and 1.0 wt % or less; a total of Si and Mo being 1.0 wt % or more; and the residual compositions being composed of iron and unavoidable impurities.