RADIAL BALL BEARING AND METHOD OF USE THEREOF

摘要

PROBLEM TO BE SOLVED: To extend the service life of a radial ball bearing lubricated with traction oil. SOLUTION: The groove radius ratio of an inner ring 1 serving as a rotating ring is not less than 51.5% nor more than 53.0%. The groove radius ratio of an outer ring 2 serving as a fixed ring is not less than 52.5% nor more than 55.0%. The groove radius ratio of the inner ring 1 is the ratio (ri/Dw) of the raceway groove radius (ri) of the inner ring 1 to the diameter (Dw) of a ball 3. The groove radius ratio of the outer ring 2 is the ratio (re/Dw) of the raceway groove radius (re) of the outer ring 2 to the diameter (Dw) of the ball 3.