deep groove ball bearing 684

684 belongs to the deep groove ball bearing series, with an inner diameter of 4mm outer diameter of 9mm thickness of 2.5mm, 684 ZZ/684 2RS inner diameter of 4mm outer diameter of 9mm thickness of 4mm, Is mainly used for punching parts, water pump, the tailor scissors, and another lathe, CNC lathe, flush valve, electrothermal film, glass processing machine, blower, mixer, welding auxiliary machine, traction, correction equipment, needle detector equipment, machine shield, jump line machine, refrigeration compressor, welding machine, casting equipment, electric spark, concrete machinery, submersible pump, glass cleaning machine, container machinery, and other equipment.

 Deep groove ball bearings are the most commonly used rolling bearings. Its structure is simple and easy to use. It is mainly used to bear radial load, but when the radial clearance of the bearing is increased, it has a certain performance of angular contact ball bearing and can bear the combined diameter and axial load. When the speed is higher and it is not suitable to use thrust ball bearings, it can also be used to bear pure axial load. Compared with other types of bearings of the same size as deep groove ball bearings, the friction coefficient of this kind of bearing is small and the limit speed is high. But not impact-resistant, and not suitable for heavy loads.

About 40% of the failed micro deep groove ball bearings are caused by dust, dirt, debris pollution, and corrosion. Pollution is usually caused by incorrect use and poor operating conditions. It also causes torque and noise problems. Micro-bearing failures caused by the environment and pollution can be prevented, and the causes of such failures can be determined by simple visual observation. As long as the use and installation are reasonable, the denudation of micro bearings is easy to avoid. Denudation is characterized by an indentation in the raceway of the miniature bearing ring caused by impact loads or incorrect installation. Denudation usually occurs when loads exceed the material yield limit. Denudation can also occur if the installation is incorrect so that a load crosses the miniature bearing ring. The pits on the miniature bearing rings also generate noise, vibration, and additional torque.

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