ROLLER BEARING

摘要

Provided is a roller bearing that can effectively increase the lifespan of the roller bearing by means of performing surface treatment using a coating film. The cylindrical roller bearing (1) is provided with: an outer ring (2) having an outer ring race surface (2a); an inner ring (3) having an inner ring race surface (3a) facing the outer ring race surface (2a); and a plurality of cylindrical rollers (4) rollably disposed between the outer ring race surface (2a) and the inner ring race surface (3a). A black oxide coating film (6a) is formed on the inner ring race surface (3a) of the inner ring (3), and a diamond-like carbon coating film (6b) is formed on the rolling surface (4a) of the cylindrical rollers (4).