Bearing internal clearance directly influences vibration, heat, and operating stability.
- C2: Less than standard clearance, used for high rigidity and precise positioning
- C0: Standard clearance, suitable for general-purpose applications
- C3: Larger than standard, commonly used in electric motors, fans, and pumps
- C4: Large clearance for high temperature or heavy-load conditions
- C5: Extra-large clearance for severe conditionsSKF engineers select clearance classes based on operating temperature, load type, and rotational speed.