deep groove ball bearing 687

687 is a kind of miniature deep groove ball bearing, in which 6 means deep groove ball bearing, and 87 means bearing size series, The dimensions of 687ZZ/687-2RS bearing: inner diameter * outer diameter * thickness =7mm*14mm*5mm; Dimensions of open type 687 bearing: inner diameter * outer diameter * thickness =67mm*14mm*3.5mm. The steel ball is generally 9, and the diameter of the steel ball is 2mm. The main materials are: Bearing steel, carbon steel, stainless steel, pottery and porcelain, plastic, etc., mainly used in electric leaf, transmission, motor, current transformers, electronic product manufacturing equipment, low-voltage circuit breaker, relief valve, office equipment, micro motor, instrument, laser engraving, a small clock, soft drive, pressure rotor, dental drill, drive motor, stepping motor, VCR magnetic drum, toy models, Computer cooling fan, money counting machine, fax machine, etc.

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 deep groove ball bearings, the friction coefficient of this kind of bearings is small and the limit speed is high. But not impact resistant, and not suitable for heavy loads.

After the deep groove ball bearing is installed on the shaft, the axial displacement of the shaft or the shell in both directions can be limited within the axial clearance range of the bearing, so the axial positioning can be made in both directions. In addition, this kind of bearing also has a specific aligning ability, when the Angle is 2 '~ 10' relative to the shell hole, it can still work normally, but it has a particular impact on the bearing life.

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