The main feature of the elastic pin coupling is to drill holes in the flange, and nylon rods or threaded pins are worn inside.However, the flange holes must be interchanged to ensure the service life of the coupling.There are three types of shaft-hole interchangeable fits, depending on the application of your shaft and hole. Clearance fit; relative motion transitional fit: Interference fit between relative motion and fixation: The shaft and the hole do not move relative to each other and are fixedly connected.The selection of matching grade is generally 6~10.

　　The characteristic of the diaphragm coupling is a bit like a bellows coupling, in fact the way the coupling transmits torque is similar.The diaphragm itself is very thin, so it is easy to bend when the relative displacement load is generated, so it can withstand up to 1.5 degrees of deviation, while generating a lower bearing load in the servo system.

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