Every possible care must be taken for following factors, to ensure smooth and satisfactory bearing performance.
Before unwrapping a bearing a bearing, all designation and symbols on carton should be thoroughly checked to make sure that bearing is exactly to required specification.
The fitter, must have a proper knowledge of bearing of bearing Mounting procedure, various operations involved, knowledge of force to be applied and amount of lubrication enquired etc.
Generally, anti frication bearings are coated with rust primitive oil. Therefore bearings should never be washed or cleaned before mounting. Washing and cleaning of bearing means damaging the bearing.
Any packed bearing must be used as it is. No supplementary modifications should be done to a bearing, such as putting additional shield, groove on outer race, taper bore, slots, lubricating hole etc. Such modification may damage the bearing and reduce it's a normal life.
For bearing, DIRT means Damage. All bearings must be properly protected from dirt. Work-shape premises used for bearing mounting must be neat, clean, dust-free and absolutely dry.
All tools to be used for mounting operations, must be totally clean.
Care should be taken to see that bearing shaft, housing and other parts are absolutely clean and dry.
Dimensions and tolerances of shaft and housing must be checked for utmost accuracy. Inaccurate shaft or housing dimensions may misalignment and thereby invites premature break-down of the bearing.
Shaft and housing dimensions should be kept in such a way that bearing gets a tight fit, (not to tight) on shaft and housing. in case inner ring slips in housing, result will be premature failure.
Small size bearings are generally passed on to the shaft whereas large size bearings are heated in an oil bath ( around 80 degree c.) for easy placement of a bearing on to the shaft.