What are type of coupling used on horizontal milling machine?

Horizontal milling machines typically use various types of couplings to connect the motor to the spindle or other drive components. Common types include rigid couplings, which provide a solid connection for high precision, and flexible couplings, which can accommodate misalignment and reduce shock loads. Other options include beam couplings, which offer flexibility and torsional stiffness, and Oldham couplings, which are used for applications requiring high misalignment tolerance. Each type serves specific operational needs based on the machine's design and application.