Technical Guide
Cross Roller Bearing Clearance and Preload
How clearance and preload affect rigidity, torque, heat and service life.
Why clearance matters
Clearance affects rotational smoothness, positioning accuracy and the ability to accommodate mounting error and thermal expansion.
When preload is useful
Preload can improve rigidity and suppress displacement in precision indexing, robot joints and inspection equipment.
Risks of excessive preload
Excessive preload increases starting torque, friction and heat, and may reduce bearing life.
Information needed for selection
Provide model, load direction, speed, accuracy target, operating temperature and mounting structure for review.
