China Quality News Recently, Jinan Municipal Market Supervision Bureau released the results of the 2022 Jinan rolling bearing product quality supervision and sampling. 2022 Jinan supervision and sampling a total of 5 batches of rolling bearing products, of which, 5 batches in circulation.

The sampling is based on GB/T307.1-2017《rolling bearing Radial bearing Product geometrical technical specification (GPS) and tolerance value》, GB/T307.3-2017《rolling bearing General technical rules》, GB/T307.4-2017《rolling bearing Thrust bearing Product geometrical technical specification (GPS) and tolerance value》, GB/T34891- 2017《rolling bearing High carbon chromium bearing steel parts Heat treatment technical conditions》, GB/T 32325-2015《rolling bearing Deep groove ball bearing vibration (speed) technical conditions》, GB/T32321-2015《rolling bearing Sealed deep groove ball bearing dust, grease leakage and temperature rise performance test procedures》, JB/T6641-2017《rolling bearing Residual magnetism and its assessment method The requirements of the standards, such as rolling bearing products sets of bearing dimensional accuracy, sets of bearing rotational accuracy, sets of bearing clearance, sets of bearing vibration, hardness, residual magnetism, microstructure and carbide mesh, work surface burns, sealed bearings dust, grease leakage, temperature rise performance, appearance quality and other 10 items were inspected.

No unqualified items were found in the random inspection.

Qualified products summary table

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[Product knowledge and consumer tips]

Rolling bearing is the operation of the shaft and the shaft seat between the sliding friction into rolling friction, so as to reduce the friction loss of a precision mechanical components. Rolling bearing generally by the inner ring, outer ring, rolling body and keep frame four parts, the role of the inner ring is with the shaft with the shaft together with the rotation; outer ring role is with the bearing seat, play a supporting role; rolling body is with the help of the keep frame uniform will rolling body distribution between the inner ring and outer ring; keep frame can make rolling body uniform distribution, guide the rolling body rotation play a lubricating role.

Rolling bearing as a high-precision products only from the appearance and other sensory indicators testing is difficult to determine the quality of its products, such as not after professional testing, the user is difficult to grasp the real product quality. How to correctly purchase bearing products, consumers can pay attention to the following points.

First, choose a good reputation, formal manufacturers to buy.

Second, pay attention to the quality of product appearance. Pay attention to the quality of the bearing surface, check the dust cover, sealing ring surface is flat, no defects.

Third, choose the bearing products with a good feel. Turn the bearing is flexible, clearance is moderate, with the hands of the bearing rotating rotor whether to feel the bearing inside impurities, blocking sense.

Fourth, check the certificate of conformity. Some bearing manufacturers apply the product verification anti-counterfeiting system, in the product quality certificate printed anti-counterfeiting code, customers can confirm the authenticity of bearing products through mobile phone enquiries.

Translated with www.DeepL.com/Translator (free version)