The diaphragm coupling transmits torque through elastic elements and metal diaphragms. Due to the friction between the bolts, the diaphragm, and the half coupling, the coupling needs to undergo quenching and tempering treatment to meet the usage requirements of the coupling. Applying a predictable low additional load to the connected devices, compared with similar flexible transmission components, the diaphragm coupling exerts a predictable small force and bending moment on the connected devices.

The diaphragm coupling can withstand misalignment and has corresponding vibration and noise reduction capabilities. The misalignment capability can meet the misalignment requirements of most power transmission devices during operation. It can operate under harsh environmental conditions, with a temperature range of up to 300 degrees Celsius, and can also operate in corrosive environments such as acids, alkalis, and salt fog. The stiffness between the shafts changes nonlinearly, which restricts the magnetic center drift of the motor.

During the service life of the diaphragm coupling, it is necessary to maintain the inclined wedge-shaped gap surfaces, add lubricating oil, and let the oil flow from the larger opening to the smaller opening. The two surfaces have sufficient relative motion speed, the fluid has sufficient viscosity, and there should be adequate oil supply. During the maintenance process, the key is to master the basic principles of fluid dynamic pressure lubrication, which is also the theoretical basis for the design of sliding bearings.

The nominal axial distance between shafts or between flanges, providing detailed dimensions and tolerances of the connected shafts or flanges, the maximum cantilever load on each shaft; the distance from the bearing near the coupling end and the type of the bearing, the large axial load on the driving and driven shafts. Correct installation should ensure that the two sides of the key are closely fitted to the walls of the keyway. Generally, this is checked during assembly using the coloring method. If the fit is not good, it can be repaired using a file or chisel to meet the requirements.