RACEWAY RING FOR RADIAL BALL BEARING, METHOD OF PRODUCING THE RACEWAY RING, AND METHOD AND DEVICE FOR PRODUCING HIGH PRECISION RING

摘要

A manufacturing method of a raceway ring for a radial ball bearing, the radial ball bearing has the raceway ring has at least one of an outer ring formed with an outer ring raceway, of which sectional shape is arcuate, and which is formed entire of circumference on an axially intermediate portion of an inner circumferential face as a raceway surface; and an inner ring formed with an inner ring raceway, of which sectional shape is arcuate, and which is formed entire of circumference on an axially intermediate portion of an outer circumferential face as the raceway surface and plurality of balls rollably provided between the inner ring raceway and the outer ring raceway. The manufacturing method of the raceway ring has a high accurate material working process of preparing a high accurate material of which volume is substantially the same as that of the raceway ring of the radial ball bearing which is a finished product by cold working and a raceway ring working process of plastically deforming the high accurate material by cold working and forming the raceway surface on the axially intermediate portion of either outer or inner circumferential face wherein working for removing material is not conducted before a heat treatment.