Abstract
In this study, we device how to measure preload of the cross roller bearing and reveal the influence of preload on function torque. In addition, we look at the effect grease filled the class roller bearing with on friction torque. One of the most important problem is reducing friction torque of the cross roller bearing. Hence, we are demanded for saving energy of machine to solve this problem. The cross roller bearing have high stiffness and rotation accuracy, however it have larger friction torque than other bearings. For this reason, design policy of giving preload to the cross roller bearing is required. We measure preload of the cross roller bearing by new contrived equipment, and test condition is tightening torque of fixing the cross roller bearing by bolts. We measure friction torque.by test machine, and test conditions are preload, rotational frequency of inner ring, and radial load. In conclusion, preload is a small influence on friction torque. Additionally, large consistency and high kinetic viscosity grease has an effect on reducing friction torque.
