The universal coupling has large angular compensation capability, compact structure and high transmission efficiency.It is suitable for transmitting torque in the mechanical shafting of petroleum machinery, heavy machinery, lifting and transporting machinery, rolling stock, construction machinery, metallurgical machinery, light industry machinery, precision machinery and control machinery and other heavy machinery industries.

　　1. The balance sheet or component on the coupling has not been compensated for dynamic balance.

　　2. When assembling, the two universal joints of the same coupling are not in the same plane.

　　3. The coupling is bent, the shaft tube is recessed, the mark is not aligned when the drive shaft is assembled, or the universal coupling fork and spline shaft are skewed when welding with the shaft tube, which destroys the dynamic balance of the original.

　　4. The coupling bolts of the coupling flange are loose, causing the position of the universal coupling to be skewed.

　　5. The spline of the coupling spline shaft and the casing is worn too much, and the gap is too large.

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