In industrial machinery, the flexible coupling is common. Within that category are many different designs. But most flexible couplings require similar assembly methods.
We have spent a good amount of money and time making sure shaft couplings is aligned correctly. But the actual coupling assembly is just as important. If coupling design, assembly, and alignment is done properly, a coupling should last for a long time. If done improperly, the machine may not even get up to speed before it fails.