couplingThe two connected shafts experience relative displacement due to various factors such as manufacturing errors, assembly errors, installation errors, shaft loading and deformation, base deformation, bearing wear, temperature changes, and relative motion between components. In general, relative displacement between two axes is difficult to avoid, but the direction of ecological equilibrium displacement produced by shaft transmission under different working conditions, namely axial, radial angular, and displacement magnitude, varies. Only flexiblecouplingOnly then can it compensate for the relative displacement of two axes, so flexibility is widely chosen in practical applicationscoupling. RigidcouplingDue to limited compensatory application scope, the dosage is very small. Universal drive should be selected for shaft systems with large angular displacementcouplingDiaphragm should be selected for shaft transmission with axial displacement control and axial movementcouplingOnly when the accuracy of the alignment is very high, should rigidity be selectedcouplingSmall torque and shaft transmission mainly for transmitting motion, requirementscouplingHaving high transmission accuracy, it is advisable to use flexible metal elastic componentscouplingThe shaft system transmission with high torque and power transmission also requires transmission accuracy. At high speeds, non-metallic elastic components should be avoidedcouplingFlexibility with gaps between movable componentscouplingIt is advisable to use diaphragm with high transmission accuracycoupling.