Patent ID: 7617610

Claim:
A method of measuring a clearance of a hub bearing for vehicles when assembling the hub bearing, comprising: fixing a hub ( 10 ) to a frame ( 60 ) when an inner ring ( 20 ) is disposed on an outer periphery of the hub ( 10 ) to be mounted to an axle and an outer ring ( 30 ) is disposed to be opposed to an upper portion of the inner ring ( 20 ) and a row of balls ( 40 ) is disposed between the outer ring ( 30 ) and the inner ring ( 20 ) opposed thereto (S 100 ); applying a load to an outer surface of the outer ring ( 30 ) so as to prevent a vibration and a movement of the outer ring ( 30 ) (S 110 ); contacting a press-fit jig ( 50 ) to an outer surface of the inner ring ( 20 ) and gradually press-fitting the inner ring ( 20 ) to the hub ( 10 ) (S 120 ); measuring a positional variation of the outer ring ( 30 ) and a positional variation of the press-fit jig ( 50 ) by an external measuring instrument (S 130 ); measuring a displacement (G 1 ) of an end surface ( 50 ) of the inner ring when a movement (E) of the outer ring ( 30 ) appears after the inner ring ( 20 ) is brought into contact with the row of balls ( 40 ) (S 140 ); and measuring a displacement (G 2 ) of the end surface ( 50 ) of the inner ring after completely press-fitting the inner ring ( 20 ) to the hub ( 10 ) (S 150 ).