What is bearing clearance?
Bearing clearance refers to the amount of internal free movement between the rolling elements (balls or rollers) and the raceways inside the bearing. This gap is critical because it influences how the bearing handles loads, distributes lubrication, and responds to temperature changes. If the clearance is too small, it may cause excessive friction, overheating, and wear. On the other hand, if the clearance is too large, it can result in vibration, noise, and reduced precision. Selecting the correct clearance is vital for achieving balance between mechanical stability and operational smoothness.
