| 摘要 |
PROBLEM TO BE SOLVED: To control a grease leak, to surely prevent a failure in lubricity and soiling of the periphery of a bearing and furthermore, to reduce raising of dust. SOLUTION: Within a bearing is housed a solid lubricating composition 4 having a lubricating component dispersed in and supported by a synthetic resin base. The lubricating composition 4 is a solidified substance of a mixture of lubricating grease or lubricating oil and an ultra-high molecular weight polyolefin powder and as the ultra-high molecular weight polyolefin powder, a polyethylene powder having an average molecular weight of 1×10<6> -5×10<6> is used. As the lubricating grease, the base oil is a fluorine-based oil and the thickening agent is a PTFE-based thickening agent and as the lubricating oil, either a fluorine-based oil, fluoro-silicone oil or an alkylcyclo-pentane oil is used. |
