ROLLING BEARING, HUB UNIT, ROLLING MEMBER, UNIVERSAL JOINT, TORQUE TRANSMISSION MEMBER FOR UNIVERSAL JOINT, AND PROCESS FOR PRODUCING THE SAME

摘要

A deep-grooved ball bearing (1) including a rolling contact member formed of a sintered β-sialon inexpensive and capable of reliably ensuring sufficient durability includes an outer ring (11) and an inner ring (12), and a plurality of balls (13) arranged in contact with the outer ring (11) and the inner ring (12) on an annular raceway. The ball (13) is configured of a sintered body that contains as a main component a β-sialon represented by a compositional formula of Si6-ZAlZOZN8-Z and satisfying 0.1 ≤ z ≤ 3.5 and has a remainder formed of an impurity.