The oil-impregnated sintered bearings are used for various aplecations and, wide usages without refueling. The oil circulating mechanism operates smoothly the behavior of oil If doing at the time of passing and becoming a stationary state, and there is little thing where trouble is caused. On the other hand, the trouble of such as starting noise might be caused in the unstationary state that repeats operation for a short time. To study the behavior of oil of each parameter, we execute the numerical simulation and various verification experiments. As a result, we developed that the bearings were able to be used enough for various brief operating time in the unstationary state. Finally we have expanded the usage of the oil-impregnated sintered bearings by adding the consideration of the behavior of oil.

• Harakawa
• Toshiro
• Maruyama
• Tsuneo
• Shimizu
• Teruo