Ball bearing

Abstract

A ball bearing includes an inner ring including a raceway groove, an outer ring including a raceway groove, a plurality of balls disposed between the raceway grooves, and a retainer having a crown shape to be inserted between the balls. The retainer includes a base portion having an annular shape, a pair of pillar portions extending from the base portion in an axial direction, and a plurality of pockets formed along a circumferential direction. The balls are fitted between the pillar portions. The retainer comes into contact with the inner ring, and a tapered surface having an inner diameter gradually increasing toward the axial direction is provided at a corner portion at an inner peripheral surface side of the base portion.

Dependencies are inferred from the claim text.