| 摘要 |
PROBLEM TO BE SOLVED: To obtain a bearing with low torque which is low in dusting characteristics and excellent in durability, by forming parts of a bearing by nonmagnetic material, and by housing in the bearing a solid lubricating component constituted of a synthetic resin base material on which a lubricating ingredient is dispersed and held. SOLUTION: For non-magnetism of a whole bearing for example, an inner ring 1, an outer ring 2 and a rolling member 3 are made from ceramic, and a cage 4 is made from austenitic stainless steel. A lubricating component 5 housed in the bearing is a solid and is constituted of a synthetic resin base material on which a lubricating ingredient is dispersed and held. A predetermined amount of lubricating grease or lubricating oil is mixed with a predetermined amount of ultrahigh molecular weight polyolefin powder as base material. At a gel point of the ultrahigh molecular weight polyolefin powder or more and when the lubricating grease is used, the lubricating ingredient is dispersed and held at a temperature of the dropping point or less, and is cooled to obtain the lubricating component 5. Oil is gradually oozed from the lubricating component 5 even in a standing state, so that the lubrication of a raceway face of the bearing can be ensured, and durability and lower dusting characteristics can be increased.
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