| 摘要 |
<P>PROBLEM TO BE SOLVED: To reduce the amount of material used to reduce cost and to ensure shoulder mounting preventive performance of balls while adopting a manufacturing method of reducing the turning allowance of turning work to an outer ring member. <P>SOLUTION: Vehicle inside and vehicle outside double-row balls 55, 56 are arranged between an inner ring member 10 and the outer ring member 60 rollably on the equal arrangement pitch circle. The outer ring member 60 is formed with vehicle inside and vehicle outside outer ring raceway surfaces 70, 71 corresponding to the double-row balls 55, 56 in a vehicle inside row and a vehicle outside row. The inner diameter dimension B of a shoulder edge part 73 of a vehicle inside raceway shoulder part 72 is set to be larger than the inner diameter dimension A of a shoulder edge part 76 of a vehicle outside raceway shoulder part 75. A center hole 65 connecting the vehicle outside shoulder edge part 76 to the vehicle inside shoulder edge part 73 is formed to be gradually larger in diameter from the vehicle outside toward the vehicle inside. <P>COPYRIGHT: (C)2013,JPO&INPIT |
