JM diaphragm coupling knowledge points and installation attention points

　　JM diaphragm coupling structure:
　　JM diaphragm coupling consists of at least one diaphragm and two half couplings.The diaphragm is fastened to the shaft sleeve with a pin and generally will not loosen or cause backlash between the diaphragm and the shaft sleeve.Some manufacturers provide two diaphragms, and some provide three diaphragms, with one or two rigid elements in the middle, and the two sides are connected to the shaft sleeve.The difference between single-diaphragm coupling and double-diaphragm coupling is: the ability to deal with various deviations is different. In view of the complex bending of the diaphragm, the single-diaphragm coupling is not suitable for eccentricity.The double diaphragm coupling can bend in different directions at the same time to compensate for eccentricity.
　　Features of JM diaphragm coupling:
　　The characteristics of JM diaphragm couplings are a bit like bellows couplings. 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. JM diaphragm couplings are often used in servo systems. The diaphragm has good torque rigidity, but it is slightly inferior to bellows couplings.
　　On the other hand, the JM diaphragm coupling is very delicate and can be easily damaged if it is misused during use or not installed correctly.Therefore, it is very important to ensure that the deviation is within the tolerance range of the normal operation of the coupling.
　　The 8 points to pay attention to when installing the diaphragm coupling are as follows:
　　① Products with diaphragms have edges and may cause injuries. It is recommended to wear thick gloves when installing.
　　②Please install a protective cover and other devices around the coupling to ensure that.
　　③When the shaft center deviation exceeds the allowable value during installation, the coupling may be deformed, resulting in damage or shortened service life.
　　④The allowable axis deviation of the coupling includes radial, angular and axial deviation.When installing, please make adjustments to ensure that the axis deviation is within the allowable range of the corresponding product catalog.
　　⑤ When multiple deviations appear at the same time, the corresponding allowable value should be halved.
　　⑥ In order to prolong the service life of the coupling, it is recommended to set the shaft deviation within 1/3 of the allowable value.
　　⑦Tighten the screws after inserting the mounting shaft, otherwise the coupling will be deformed. When tightening the screws, please use a torque wrench, do not use screws other than accessories for installation.
　　⑧If there is an abnormal sound during operation, please stop the operation immediately and check the installation accuracy and screw loosening. It is recommended to apply adhesive on the outer surface of the screw after installation and debugging to increase the protection performance.