Other Factors Affecting Bearing Fit

● The influence of operating temperature. When a bearing is operating, the temperature of the rings exceeds that of the mating parts due to frictional heat and other heat sources. Thermal expansion of the inner ring can loosen the fit with the shaft journal, while thermal expansion of the outer ring can tighten the fit with the housing bore. ● The influence of rotational accuracy and speed. For bearings that bear heavy loads and require high rotational accuracy, a fit with clearance should be avoided to eliminate the effects of elastic deformation and vibration. However, for lightly loaded bearings used in precision machine tools, a fit with clearance is often used to minimize the impact of shaft shape errors on bearing accuracy. It is generally believed that the higher the bearing's rotational speed, the tighter the fit should be. ● Conditions for Bearing Installation and Disassembly. A loose fit is recommended for ease of installation and disassembly. This is particularly important for large and extra-large bearings used in heavy machinery. If easy installation and disassembly are required while still maintaining a tight fit, a separable bearing or a bearing with a tapered bore in the inner ring, an adapter sleeve, and an extraction groove can be used.