Some hand the lack of differential experience of TIMKEN bearings, whenever you see bearing no obvious injuries would continue to be used, subsequently causing serious malfunction. Just remove the bearing without checks will be replaced, sometimes also replaced the bearings can continue to use. Technical condition of TIMKEN bearings should be carried out on a private tester checks, data measurement can also dial indicator. For General hand, but, when you do not have these conditions, available empirical method a cursory check.
(1) to observe the law. With the naked eye observation of TIMKEN bearings, internal and external Raceway should be no signs of peeling and excessive wear and is a circular Groove; all rolling surface should be no spot, crack and Peel; cage should not be loose, non-destructive, not worn, and the rolling gap, however.
(2) the handle method. Normal clearance of the bearing rings and rolling elements both inside and outside of 0.005~0.010 mm. Have used a stage bearing, axle of squeeze with your fingers when you shake, should no clear exclusion or noise.
(3) turn the law. Clamping bearing inner race with one hand and the other hand turn the outer race, the bearings should be able to rotate flexible, and should feel no radial shake.
When checked, 3 of the above experiences should be combined in order to facilitate the technical state of the TIMKEN bearing to make the right judgments. For tapered roller bearings, also should observe is in the middle of things, if it has moved forward, should be less than 1.5 mm.



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