The force needed to mount a bearing increases rapidly with bearing size. Because of the mounting force required, larger bearings cannot easily be pressed onto a shaft or into a housing. Therefore the bearing, or the housing, is heated before mounting.

The temperature difference between the bearing and seating depends on the magnitude of the interference fit and the bearing size. Normally a bearing temperature of 80 to 90 °C (144 to 162 °F) above that of the shaft is sufficient for mounting. Never heat a bearing to a temperature greater than 125 °C (257 °F), unless otherwise specified. Extreme heat can cause the material to change metallurgically and produce alterations in diameter or hardness. Local overheating must be avoided and in particular never heat a bearing using an open flame.

Wear clean protective gloves when mounting a hot bearing. Lifting (hoisting) gear can facilitate mounting. Push the bearing along the shaft as far as the abutment and hold the bearing in position, pressing until a tight fit is obtained. SKF supplies a full range of heating equipment, which covers most common mounting needs. Specials are also available on request.