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Rolling bearing judgment method

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(1) The radial ball bearing with normal judgment skill of the radial ball bearing; the inner and outer ring raceways shall have no falling off and severe wear marks; and a circular groove with bright light, all the balls shall be rounded; No mottled, cracked and detached, insisting that the frame is not slack, not broken, not worn. When using one hand inner ring; the other hand is agilely pushing the outer ring to rotate; the demand rotates smoothly; only the ball is heard on the raceway The slight movement of the tumbling; no oscillation, the gradual deceleration should be slowed down; there is no backward appearance after stopping; the normal centripetal ball bearing; the gap between the inner and outer rings and the tumbling body is 0. 005-0. 010mm; When the inner and outer rings are shaken radially; the bearing should be felt without gaps; the inner ring can be shaken a few times in the axial direction by hand; when the outer ring and the ball have significant movement; the cooperation gap exceeds 0. 03mm; should not continue to use.
(2) After the bearing of the tapered roller bearing is used, it should be checked whether the rolling body and the inner ring raceway can fall off; whether the frame can be too loose; whether the front and rear margins of the inner ring can be intact; whether the outer ring raceway can have cracks. After the inner ring and roller assembly are installed in the outer ring; the roller should fall into the center of the raceway; the forward displacement does not exceed 1. 5mm. One of them is unqualified; that is, it cannot be used.
(3) Determination of spherical roller bearings and short cylindrical roller bearings The outer ring of these bearings is separable. Under normal conditions; the inner and outer ring raceways and rollers should be free of breaks, pitting and deep wear marks. , adhere to the frame should be no deformation and can gather the roller on the inner ring, the cooperation gap between the inner and outer ring raceway and the roller should not exceed 0. 06mm.
(4) When the thrust ball bearing determines the normal condition; the two raceways should have no falling damage and severe wear; the balls should be free from breakage and pitting, and the frame should be free of deformation; do not touch the two raceway washers; and the balls are firmly gathered Together.

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