ROLLING BEARING FOR ACCELERATION/DECELERATION MACHINE, AND ACCELERATION/DECELERATION MACHINE

摘要

PROBLEM TO BE SOLVED: To provide a rolling bearing for an acceleration/deceleration machine capable of effectively preventing early peeling on a rolling surface due to hydrogen brittleness when used in an acceleration/deceleration machine in a wind power generation device or the like, and provide an acceleration/deceleration machine using the same.SOLUTION: In an acceleration/deceleration machine accelerating/decelerating rotation of an input shaft 2 with a planetary gear 9 and transmitting it to an output shaft 3, a rolling bearing 17 for an acceleration/deceleration machine rotatably supporting the planetary gear 9 while subjected to oil lubrication includes: an inner ring; an outer ring; and a plurality of rolling bodies interposed between the inner and outer rings. At least one bearing member selected from among the inner ring, the outer ring, and the rolling bodies is made of a steel material, and at least part of an oxide-based inclusion contained in the steel material is covered with MnS. In the oxide-based inclusion having a maximum diameter of 3 m or more, the ratio of the number of oxide-based inclusions covered with MnS to the total number of oxide-based inclusions is beyond 40%.