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In the actual production, we often need to be tested for bearing rotation flexibility, radial clearance of KOYO bearing imports of measurement is not easy, because the measuring force will make the KOYO bearing rings and rolling elements and their contact points to the elastic deformation, the deformation is caused by multiple factors of measurement error, contact with the measuring force the state, and rolling are related to body position.
Rotating flexible KOYO import bearings generally in a horizontal position check, will usually be the inner ring is fixed (or hand-held inner ring, outer ring rotation) by hand, check whether there is abnormal sound of bearing rotation and blocking phenomenon. Generally speaking, the duration of rotation of the bearing length, stop slowly, flexibility is good. On the contrary, the rotation time is short, stopped suddenly, flexibility is not good. Because the bearing structure type and dimensions, the rotation flexibility also have different requirements. For example, a single row radial ball bearings, single row angular contact ball bearing, the contact area between the rolling body and the ring is small, these KOYO bearings rotate more lighthearted, and double row radial spherical bearings and thrust roller bearing, the contact area of the rolling elements and raceways is relatively large, while the outer ring of the weight is small, in the examination the rotation flexibility, although with certain load, but the light still not the level of a single row radial ball bearing. The bearing of large, when the rotation, should not have stuck phenomenon, and rotation of the sound are generally not check.
Bearing for the conical hole, the following methods can be used to supplement the rotational flexibility inspection KOYO imported bearings, the specific operation as follows:
The tapered bearing pressing mandrel to add certain radial preload, in the pre load, when a ring rotates to a rolling body shall rotate. If the rolling sliding instead of turning, said ring shape defects are excessive or uneven rolling body size, rotation flexibility of the bearing is poor.