A shaft coupling transmits torque between driver and driven equipment. Flexible designs accommodate limited misalignment and can modify torsional behaviour, but no coupling should be used to excuse inaccurate installation.
Flexible coupling families
Elastomeric couplings provide damping and simple element replacement. Grid and gear couplings carry high torque but require lubrication and inspection. Metallic disc couplings are torsionally stiff and avoid lubrication, provided alignment and bolt installation are controlled.
Application data
Select for continuous and peak torque, speed, shaft diameter, starts, reversals and environmental exposure. Check allowable angular, parallel and axial movement individually; catalogue limits usually cannot all be consumed at once.
Guarding and maintenance
Provide a guard that prevents contact while allowing inspection where required. Document hub fit, key, fastener torque and alignment targets. Recheck alignment after piping, operating temperature and foundation settlement influence the machine train.
