1, axle bearing parts must comply with the relevant national standards, industry standards, and drawing annotations are subject to drawing standards.

2, bearing cones, ball must pass inspection, the crack is not allowed. Machining process, the acid test is necessary, Burns is not allowed.

3, finished steel ball spot checks should be carried out before Assembly. The steel ball quality should meet the requirements of GB/T308 standard.

4, cage-technical requirements should be consistent with existing national and industrial standards, cage materials, the product drawing requirements. Iron cage requirements surface pickling treatment. Cage surface pits, pigmentation, SCAR is not allowed.

5, part tolerance requirements