The torque transmission of the coupling is mainly to set the nominal torque requirement of the transmission system. When overloading, the torque transmission element is separated from the two halves of the coupling to realize the protection of the transmission system at both ends of the main shaft.

　　Coupling materials can be roughly divided into sections (round steel), castings (cast iron or cast steel), forgings, etc., and cast steel and forgings are most of the choices of coupling materials.Profiles are generally a form of coupling material often used in relatively small couplings.

　　For example, plum blossom couplings below ML5 (outer diameter is 125). However, when this kind of small coupling is manufactured with profiles, it is necessary to pay attention to quenching and tempering treatment is the key to effectively improve the material performance, the choice of coupling material It is directly related to the performance of the coupling.

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