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　　The protective device of the coupling is usually provided by the buyer. Therefore, this part of the content is not a requirement for the coupling. The buyer or the contractor should specify the type of protective device required. Each coupling should have a protective device for Seal the coupling and shaft to prevent the unit from running...

　　The elastic coupling has good axial compensation, good vibration reduction performance, radial and angular axis offset performance, simple structure, stable and reliable operation, no noise, no lubrication, simple maintenance, convenient assembly and disassembly, and good manufacturability , Low cost, long life...

　　The JMI type basic diaphragm coupling with counterbore is elastically deformed to compensate for the relative displacement of the connected two shafts. It is a high-performance flexible coupling with metal elastic elements. It does not require lubrication, and has a compact structure and high strength. Long life, no rotation gap, not affected by temperature and oil...

　　Before installing the JMIJ diaphragm coupling, first check whether the prime mover and the working machine are concentric, whether there are wrapping paper and scratches on the surfaces of the two shafts, and whether there is debris in the inner holes of the two half couplings of the coupling. Whether there are bruises on the edge of the hole, if so, the shaft and half coupling should be cleaned...