ROLLING ELEMENT BEARING AND MOTOR

摘要

A bearing comprises an inner ring having an inner ring raceway on its outside diameter surface, an outer ring having an outer ring raceway on its inside diameter surface, balls arranged between the inner and outer raceways, and a retainer for retaining the balls with spacings in the circumferential direction. The inside diameter of the bearing is set to between 3 mm or more and 17 mm or less, and the outside diameter, between 8 mm or more and 40 mm or less. The bearing is used for supporting a shaft provided with a fan. The bearing is characterized in that te >= 1.24ti with ti the thickness from the groove bottom of the inner ring raceway to the inside diameter surface of the inner ring and te the thickness from the groove bottom of the outer ring raceway to the outside diameter surface of the outer ring, and an amount of residual austenite included in the inner ring is 7 weight% or less.