The corrected load condition C/P<13 of the vehicle tensioner limit speed (ie, the equivalent dynamic load P exceeds 8% of the basic dynamic load C), or the axial load in the combined load is exceeded. When the radial load is 25%, the limit speed is corrected by the following formula.

 

The limit speed after the correction of the car bearing, the correction factor f2 related to the load condition: the correction factor n related to the combined load: the limit speed under the general load condition, the basic dynamic load rating, the equivalent dynamic load, the radial load Axial load, limit speed with seal ball bearing The limit speed of the ball bearing with contact seal is limited by the line speed of the contact surface of the seal ring, allowing the speed of the bearing line of the car to depend on the rubber material of the seal ring.