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Flexible Bellows Shaft Coupling For Servo Motor

  • GRC series

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Bellows coupling structure and principle

The bellows coupling is composed of two metal hubs and a thin-walled bellows, which are connected as a whole by welding or bonding. The core transmission component is a corrugated metal tube, which transmits torque by the elastic deformation of the corrugated tube and simultaneously absorbs the radial, angular and axial deviations of the connecting shaft (with a compensation capacity of 1°-2° angular deviation and 0.01"-0.02" parallel deviation). This design requires no lubrication and achieves power transmission with zero rotational clearance.


Materials and Manufacturing processes ‌

  1. Bellows material ‌ : mainly made of stainless steel or nickel-based alloy, stainless steel bellows are manufactured by hydraulic forming process, with higher strength and rigidity; Nickel corrugated tubes are formed by electrodeposition, with wall thickness accuracy reaching the micrometer level and higher sensitivity.

  2. Connecting parts ‌ : The hub is usually made of aluminium alloy or high strength anti-rust steel to reduce overall inertia.


Features of Diaphragm Shaft Coupling Coupler
1、 Short Double diaphragm type flexible coupling
2、High torsional rigidity, no gap connection between shaft and shaft sleeve, suitable for ultra precision control
3、Common and servo, stepping motor
4、Clockwise and counterclockwise rotation characteristics are identical
5、Low inertia, suitable for high-speed operation
6、The diaphragm is made of 304 stainless steel, which can compensate radial, angular and axial deviations
7、In case of multiple deviations, the allowable value of a single deviation will be reduced
8、 Double diaphragm type can absorb deflection and eccentricity, but the whole length will be longer.


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