Patent ID: 8091240

Claim:
An assembling method of a bearing unit which comprises a bearing having an outer ring and a retainer plate having a retainer hole for holding the outer ring, the assembling method comprising: bringing an axial end face of the retainer plate to contact with an end face of a small diameter step portion provided in an axial end portion of an outer circumferential face of the outer ring; and after bringing the axial end face of the retainer plate into contact with the end face of the small diameter step portion, pressing a plurality of portions of a circumferential edge of an inner circumferential portion of the retainer hole of the retainer plate against the end face of the small diameter step portion of the outer ring so as to form engagement pawls contacting with the end face of the small diameter step portion and protruding radially inward of the bearing unit, to thereby engage the engagement pawls of the retainer plate with an engagement groove continuously provided at the end face of the small diameter step portion of the outer ring.