| 摘要 |
PROBLEM TO BE SOLVED: To improve fatigue resistance and load resistance by providing a specific lubricating film formed by coating a bearing basic surface formed of a copper bearing alloy. SOLUTION: A bearing is constituted of a bearing base body and a lubricating film 3, and the bearing base body is constituted of a copper bearing alloy or may be lamination 2 of the copper bearing alloy in a back plate 1 of steel plate or the like. The lubricating film 3 comprises a 30 to 90wt.% solid lubricant and a 70 to 10wt.% thermosetting binder, and thickness of the film is 2 to 10μm. In the thermosetting binder, at least one kind of polyimide resin, epoxy resin and phenolic resin is used. The copper bearing alloy is hard as compared with an aluminum alloy, and plastic deformation of the lubricating film by a load received under a use condition is suppressed. Consequently, in a fine part receiving a severe load and uneven contact, conformity of the lubricating film is generated, and a lubricating effect is easily obtained. Consequently, excessive wearing, observed in the lubricating film of the bearing base body formed of the aluminum alloy, is prevented from being generated, and fatigue strength of a total unit of the bearing is also improved. |
