Double seal bearing

A double seal bearing including an inner race, an outer race, and rotating bodies interposed therebetween, wherein:

• the outer race includes a shoulder at each end thereof, each said shoulder provided on an inner peripheral surface of said outer race, and
• the inner race includes at each end thereof an inner shoulder of larger diameter and an outer shoulder of smaller diameter, an outer peripheral surface of the inner race having a stepped contour at each end thereof formed by respective ones of said inner and outer shoulders;
• further including a pair of annular inner and outer sealing plates each having a respective central opening,
• said inner sealing plate being secured on one of the inner or outer races while leaving a clearance between the inner sealing plate and the other of the inner or outer races so as to prevent the inner sealing plate and the other of the inner or outer races from contacting each other to assure the labyrinth seal function,
• an outer diameter of the outer sealing plate being substantially the same as or smaller than an outer diameter of the outer race,
• an inner peripheral portion of the outer sealing plate being secured on an end surface of the outer shoulder of the inner race while leaving an axial clearance between an outer peripheral portion of the outer sealing plate and an end surface of the outer race so as to prevent the outer sealing plate and the outer race from contacting each other to assure the labyrinth seal function.