Patent ID: 8136994

Claim:
A sensor-equipped rolling bearing apparatus comprising: a magnetic member mounted such that a magnetic field can alternately change in a circumferential direction of a rotating ring; and a sensor fixed to a stationary ring so as to detect the magnetic field of said magnetic member to thereby measure a rotational speed of said rotating ring, wherein said bearing apparatus includes an annular member through which, said sensor is fixed to said stationary ring, wherein said annular member includes a fixing portion to which said sensor is fixed, and a cover portion fitted on said stationary ring, wherein said fixing portion and said cover portion are separately formed and connected together, wherein said cover portion covers said magnetic member over an entire periphery thereof such that said magnetic member is not exposed to the exterior in an axial direction, wherein the annular member includes a cylindrical portion and an extension portion extending radially from an axially-outer end of the cylindrical portion toward the rotating ring, wherein the extension portion includes an abutment surface abutting against an end face of the stationary ring in a state that the cylindrical portion of the annular member is fitted to the stationary ring, and wherein a drain hole for discharging water is formed in the extension portion such that the abutment surface corresponding to the drain hole is removed.