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  Removing a Bearing

Introduction to Removing a Bearing

It is significant to take great care throughout the bearing removal to make sure that the bearing, shaft and housing are not broken. Bearing removal is best accomplished through using a bearing puller for standard outer and inner rings. While removing bearings which comprise a backing shoulder which extends across the cone large rib, a puller which pulls by the rollers should be used. It is suggested to make use of a three-arm puller rather than a two-arm one as the three-arm puller is more stable. When possible, apply the withdrawal force to the ring along with the interference fit. The inner rings of cylindrical roller bearings usually comprise a tight interference fit that needs high forces to remove. In such types of cases, by using a puller can cause damage to the shaft and ring, and can be dangerous to the operator. By using heating equipment facilitate simple and quick removal when reducing the threat of damage to the ring and shaft.

Removing bearings using hydraulic techniques

Hydraulic pressure is other available technique to remove bearings. Pullers or wedges might be employed to eliminate the bearing after the hydraulic pressure has extended the race. Hot oil or heat might be employed together with the pullers or wedges. While the puller has been located on the bearing and pressure is applied, the bearing race should extent and be removed easily. For safety of own, do not strike the bearing directly with any solid object like a hammer or chisel. Apply force to the part of bearing which has highest fit.

Fitting Bearings

Ball and roller bearings are manufactured to extremely close tolerances and are hence damaged very easily by careless handing and fitting. Therefore, very much care is needed in fitting up and keeping them. The bearing housing and the shaft end, on which the bearing fits, should be carefully cleaned thus that the bearing fits neatly and just push tight. Bearings should never be driven tight, since it will twist the race and damage the bearing. Grease, of the best quality, have to be, lightly packed into the bearing itself and the bearing after that fitted into position in its housing. The inner race might be pressed on to the shaft but if this is not feasible; it can be fitted into position through lightly tapping with a wooden mallet on a tube passing over the shaft end. Care has to be taken to make sure that the bearing is square on the shaft.

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