Patent ID: 7800265

Claim:
A motor for an electric power steering apparatus, comprising: a rotor; a casing that receives said rotor therein and has a bearing box in which a rolling element bearing rotatably supporting a shaft of said rotor is received; a wave washer of an annular shape that is arranged between a bottom surface of said bearing box and said rolling element bearing, has a plurality of convex portions and concave portions that alternately undulate in a circumferential direction, and applies a preload to an outer race of said rolling element bearing; and a spacer of an annular shape that is arranged between said bottom surface of said bearing box and said rolling element bearing so as to be in abutment with said wave washer for adjusting said preload applied to said outer race, wherein said convex portions protrude in a direction towards said rotor,. wherein said spacer is formed of a resin, and has snap fit portions adapted to engage said wave washer, and wherein said snap fit portions engage an inner peripheral edge portion of said concave portions of said wave washer.