| 摘要 |
PROBLEM TO BE SOLVED: To provide a bearing device comprising a resin cover made of a resin blended with glass fibers, improved in the low water absorbing property of a cover and calcium chloride resistance thereof so as to be sufficiently durable in use in a snowy district, and restricted in occurrence of shrinkage and deterioration of dimensional accuracy. SOLUTION: The bearing device comprises a member corresponding to an outer ring having an outer ring raceway in the inner peripheral surface thereof and structured not to be rotated in use, a member corresponding to an inner ring having an inner ring raceway in the outer peripheral surface facing the inner peripheral surface of the member corresponding to the outer ring and structured to be rotated in use, a plurality of rolling bodies provided between the outer ring raceway and the inner ring raceway freely to roll, a rotation detecting encoder fixed to the member corresponding to the inner ring, and a synthetic resin cover fixed to an opening part of the outer ring. The synthetic resin cover contains at least a low water absorbing resin of 45-80 mass% and glass fibers having different cross sections of 20-55 mass%. COPYRIGHT: (C)2008,JPO&INPIT
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