A bearing may be removed for regular inspection or failure of machines. If the removed bearing is to be reused or it is removed for inspection, it should be dismounted as carefully as when it was mounted, to avoid damaging bearings, shafts, housings, seals, etc.
Dismounting Inner Ring
If the mounting design allows the space to press out the inner ring, it is an easy and fast method. The arbor of the press should be aligned concentrically with the shaft center of the bearing and the support jig should contact only the face of the inner ring. Applying force to the outer ring may dent or score the raceway or the ball, resulting that the bearing cannot be reused. Refer to the examples in Figure 1.
Extracting tools are often used to dismount the inner ring. Figure 2 shows examples of the use of such tools. The claw hooks of the tools should make firm contact with the face of the inner ring.
Dismounting Outer Ring
It is advisable to put several threaded holes on the housing in advance as shown in Figure 3 if it will be necessary to remove the outer ring mounted by interference fit. Please be sure to screw the bolts into the holes evenly. Applying force to the outer ring only, or the raceway or the ball may be scored, resulting that the bearing cannot be reused. The holes should be usually fitted with blank plugs.