The type of prime mover and the nature of the load of the working machine, the output speed of the electric motor is stable, while the output speed of the internal combustion engine fluctuates greatly.The matching type of the coupling is an important information for the selection of the assembly process, and the accuracy of the assembly is an important means to verify the quality of the assembly.

　　If the load of the working machine has impacts, vibrations, large changes, frequent start-ups, and reversing, a coupling with buffering and vibration-absorbing capabilities should be selected.The axis position accuracy of the two shafts generally requires high centering of the two shafts and the rigidity of the shaft. A sleeve coupling or a flange coupling can be selected.

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