Coupling dimensions, namely, the maximum radial and axial dimensions, must allow space for installation of machinery and equipment within. You should choose easy assembly and disassembly, no maintenance, maintenance of long or easy maintenance, replacement of wearing parts without moving the two shafts period of adjustment easy coupling.

Large-scale machinery and equipment for the two-axis adjustment more difficult, should choose to use durable and easy to replace wearing parts of the coupling. Metal elastic element of flexible couplings in general than non-metallic flexible coupling elastic element long life. Require lubrication and the use of non-durable sealing couplings, will increase the maintenance workload. For long-term continuous operation and high economic efficiency of the occasion, such as China's metallurgical enterprises in the high-speed end mill drive system, now widely used in the gear coupling, gear coupling Although theoretically transmit torque, but must be lubrication and seal durable good conditions to work. And the need to regularly check the seal condition, injection lubricating oil or grease, maintenance workload, increased aid work, reducing the effective working time, affecting production efficiency. International industrial countries, have common use long life, no lubrication and maintenance diaphragm coupling along replace the drum gear coupling, not only improve economic efficiency, but also purify the working environment. In the selection of the mill drive system developed by the elastic pin coupling and live segments flexible coupling, not only has the advantage of a diaphragm coupling, and a good buffer damping effect, the price is cheaper.