Rolling bearing, hub unit, rolling contact member, universal joint, torque transmission member for universal joint, and method of producing the same

摘要

A deep-grooved ball bearing including a rolling contact member formed of a sintered β-sialon inexpensive and capable of reliably ensuring sufficient durability includes an outer ring and an inner ring, and a plurality of balls arranged in contact with the outer ring and the inner ring on an annular raceway. The ball is configured of a sintered body that contains as a main component a β-sialon represented by a compositional formula of Si_6-ZAl_ZO_ZN_8-Z and satisfying 0.1≦z≦3.5 and has a remainder formed of an impurity.