Bearing nameplate to distinguish.
Check with relevant bearing special testing instruments. Inspection items include: materials, main assembly dimensions (outer diameter, inner diameter and height), bearing clearance, rotation accuracy, noise and appearance.
Without instruments, the most direct way is to look at the appearance first and compare the bearings of the same model according to different manufacturers (bearings of regular manufacturers can also be compared in advance). Taking the example angle as an example, the bearing chamfer of the regular manufacturer is smooth and uniform in size (compared with the same model), the overall appearance of the bearing is exquisite, and the end face traces are consistent and clear. When the bearing is rotated by hand, the rotation is good and there is no noise.
Nameplate code:
Harbin bearings -HRB
Wafangdian bearings -ZWZ
Luoyang bearings -LYC
The three major bearing enterprises referred to by Axle Association are Dalian Wazhou (Wafangdian Bearing) Group, Harbin Bearing Group and Luoyang Bearing Group. They account for 15% of China bearing market share, among which Dalian Wazhou Group, the largest bearing enterprise in China, existed before the founding of the People's Republic of China, and now Dalian Wazhou is sprinting to the top ten bearing enterprises in the world. These are the three major bearing factories in China, all of which are state-owned.