What does the bearing feel test involve?

• A. The Lubricant Viscosity
• B. The Thermal Expansion Coefficient
• C. Comparing The Rotational Feel Of A Bearing Against A New One
• D. The Noise Level During Rotation

Answer: (C)

The bearing feel test is a tactile check of how smoothly a bearing turns by comparing its rotational feel to that of a brand-new bearing. This helps reveal wear or damage that changes friction and clearances, such as roughness, gritty spots, sticking, or variable resistance. A new bearing should rotate with consistent, light resistance, while a worn one typically feels uneven or dirty to the touch. This test focuses on the subjective sense of rotation, not on lubricant viscosity, thermal expansion, or audible noise during rotation, which are assessed by other checks.