Bearing device equipped with resin-made pulley

摘要

A bearing device equipped with a resin-made pulley has, at one axial end portion of an outer ring, cutout portions which are formed so as to be opened on their outward side of the axial direction and spaced from one another at a specified interval in a circumferential direction of the outer ring. Each cutout portion has a rectangular-shaped sloped surface which is sloped radially outward of the outer ring along an axial direction from an opening-side end to the center of the outer ring so as to adjoin the cylindrical surface portion on the axially opposite side to the opening. Each cutout portion further has side faces which are generally parallel to a vertical bisector plane of the sloped surface containing a center axis of the outer ring on circumferential both sides of the sloped surface in a cross section perpendicular to the center axis of the outer ring.