グリース潤滑された小型玉軸受のトルク特性に関する研究

（小径玉軸受608のトルク現状調査）

抄録

Small ball bearings can be easily sealed with lubricant by using grease, so they are used in many applications such as bearings for home appliance motors. In addition, as performance requirements, there are increasing demands for higher efficiency and higher speed in electrical motors. To realize higher efficiency in motors, lower torque is required when applied to rolling bearings. Therefore, lower torque in bearings is an increasing demand. However, research on the torque of small ball bearings with grease lubrication has just begun, and it is difficult to say that the problem has been fully understood. Thus, in this study, the authors conducted a lot of torque measurement under the same rotation conditions using a commercially available grease-lubricated deep groove ball bearing 608. This is to investigate the current state of grease-lubricated torque in the bearing. As a result, it became clear that even products from the same bearing manufacturer do not have constant torque, and that there are large variations and fluctuations.