The relationship between the bearing clearance and rotation flexibility, the whole bearing radial clearance measurement is not easy. Measuring the force itself and its rings and rolling body at the contact elastic deformation, deformation measurement error is caused by multiple factors, which measure the force and the contact state and the position of the rolling elements are related.

Bearing swivel flexibility generally in a horizontal position checks, usually if there is abnormal sound phenomenon and arrest the fixed inner ring (inner or handheld), the outer ring is rotated by hand, checking bearings. Generally speaking, the bearing rotation of long duration, stop slowly, like flexibility. Conversely, short rotation time, stop suddenly, flexibility is not good. Because of different type and size of the bearing structure, the flexibility of its rotation should have different requirements. For example, single row radial ball bearings, angular contact ball bearings, the contact between the rolling elements and rings small size, these bearings rotate relatively light, while the double row radial bearings and spherical roller thrust bearings, the rolling body and raceway contact area is large, and the weight of the outer ring and small, when examining its rotation flexibility, although with a certain load, but its extent is still brisk and single row radial ball bearings. For large bearings, when its rotation, there should be no stuck phenomenon, and the rotation is not normally sound check.