What are the influence factors analysis of ball bearing friction torque?

What are the influence factors analysis of ball bearing friction torque? Ball bearing friction torque factor: 1. External load displacement: ball bearing, ball bearing contact with the roll channel slot part deformation, according to the displacement. 2. The rated current value: the motor rotates the current value is too large, may be related to grease filling amount, consistency, viscosity and so on. 3. Starting current value: starting current value of the machine may be the cause of excessive grease filling amount is too large, the viscous grease, etc. 4. Reach rated speed: sometimes happens after motor starting reach rated speed of the phenomenon, reason may be that add too much grease or by using the viscous grease etc. 5. Temperature and torque: general temperature become low, the dynamic friction torque. 6. Grease filling position: the influence of dynamic friction torque value is due to the difference of grease filling position. That is to say, the grease stained with attached to keep the rack and cleave, rotate when the outer diameter or outer diameter, and these parts without cleave grease rotate, the friction torque values are different.