What is the meaning of "out-of-round" bearings, and what is the impact on the operation of the equipment?

New bearings go out of round, please check the fit, if it is loose, it will be so.

The mechanism of traditional bearings is that the inner and outer rings provide a sufficiently smooth, hard surface

to allow the rolling elements to roll on the surface

Once the outer ring or inner ring is loose:

1. As bearings are generally stiffer than the housing or the shaft, it will lead to wear of the housing and the shaft, which is similar to cutting; the subsequent loss of precision of the bearings will make the operation no longer smooth and effective.

2. The rotational energy to be partially transformed into a mixture of sliding and rolling, with the exacerbation of sliding, heat generation, and gradually evolve into dimensional changes, material changes; and ultimately, bearing components will fail.