Bearings should meet restored after about quality inspection requirements:

(1) rings and the working surface of the rolling elements are not allowed burns, cracks, corrosion and metal fatigue spalling layer; Size

(2) the difference between the rolling elements to each other should be kept within a certain range;

(3) the holder does not allow cracks, burrs and deformation, does not allow partial riveting, riveting loose and leak riveting;

(4) work surface roughness of the rings and rolling elements and the mating surface shall meet the corresponding requirements; Size deviation

(5) of the bearing, rotation accuracy should be consistent with the relevant provisions of the standard;

(6) bearing swivel must be flexible, not allowed to have suddenly stopped jamming goods;

The following defects are allowed on the mating surfaces:

(1) The length does not exceed one third of the circumference of the turning of fine lines; width does not exceed 1/4 of the ring width, length does not exceed the circumference of fine lines side by side turning 1/4;

(2) Individual coarse grinding scar patterns;

(3) oxidation peeling small spots left traces 1 to 2;

(4) Elimination of rust and slight bruising after traces.