In manufacturing equipment and industrial equipment, couplings (shaft couplings) are used to accurately transmit power from a motor to a driven shaft. A coupling is a mechanical component that connects the drive shaft and the driven shaft, serving functions such as absorbing mounting misalignment and dampening vibrations.

However, there are several types of couplings—including jaw-type, disc-type, and bellows-type—and selection must be based on the specific application and required characteristics.

This article provides a systematic explanation ranging from the basic functions of couplings to their main types and characteristics, as well as key points for selection. It also summarizes how to pair couplings with motors—essential knowledge for maximizing coupling performance during motor selection.