Patent ID: 6628477
Filing Date: 2003-09-30
Classification: F16C,G11B,H02K

Abstract:
Spindle motor, in particular for driving the storage disk(s) of a hard disk drive, with a stator, a rotor, a shaft disposed between stator and rotor, at least one roller bearing disposed on the shaft, which comprises an inner and an outer bearing ring with roller bodies disposed between them;at least one equilibration means for decreasing nominal radial play in the roller bearing (16, 18, 21, 25, 28, 30) by acting upon at least one outer and/or inner bearing ring (9, 11, 23, 24), which is disposed between the corresponding bearing ring (9, 11, 23, 24) and a part supporting the bearing ring, and which has a specified coefficient of thermal expansion &agr;; and characterized in that the equilibration element (21) is disposed on an annular insert (20) disposed on the shaft (8).