Patent ID: 6050729
Filing Date: 2000-04-18
Classification: F16C,G11B,H02K,Y10S

Abstract:
A compound ball bearing comprising:a bearing assembly including a spindle (1), a sleeve (2) surrounding said spindle (1) and a double-row of balls (5), (9),said spindle being a stepped spindle (1) having a large diameter portion (1a) and a small diameter portion (1b),said double-row of balls comprises a first row of balls (5) and a second row of balls (9),said balls (9) of the first row being provided between an outer race 7 formed on an inner ring (6) fitted on said small diameter portion (1b) of said spindle (1) and a corresponding first inner race (8) formed in said sleeve (2),said balls (5) of said second row being provided between an outer race (3) formed on said large diameter portion (1a) of said spindle (1) and a corresponding second inner race (4) formed in said sleeve (2),said spindle (1) being integrally formed as a one-piece unit with a base (16) of a motor.