Without checking to be replaced, sometimes can continue to use the bearing replaced. Rolling the technical condition of the check should be performed in a dedicated inspection instrument, some data is also available dial indicator measurements. But for the general machine hand, when these conditions does not have available empirical methods cursory inspection.
(1) observation. Observed with the naked eye rolling bearing, inside and outside the raceway should be no peeling signs of severe wear, and was an arc-trench-like; All rolling surface should be free of spots, cracks and peeling phenomenon; cage should not loose, no damage, not worn out rolling body clearance, however large.
(2) feel method. The normal bearing inner and outer races of the rolling element a gap of 0.005 to 0.010 mm. Axial shaking on stage Rolling with your fingers to pinch the inner race, Kuang moving sound.
(3) Turn the Act. Turn the outer race bearing inner race, with one hand holding the other hand, the bearings should be flexible rotation, and should feel the radial shaking.
Examination, the three kinds of empirical methods should be combined to make the right judgments, in order to facilitate the technical condition of rolling bearings. For the taper roller bearings, should also be observed that the rolling body is located in the middle of the outer race, and if so forward, should be not more than 1.5 mm.


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