What is circular keys?

Circular keys are commonly used in mechanical engineering to transmit torque between a shaft and a hub or a gear. They are designed to fit into keyways or keyseat slots, which are cut into the shaft and the hub, respectively, and prevent them from rotating relative to each other.

Circular keys are typically made of steel or other strong materials, and are usually circular or semi-circular in shape. They come in various sizes and are classified according to their shape, size, and material.

The most common types of circular keys include feather keys, parallel keys, gib-head keys, and Woodruff keys. Feather keys have a rectangular cross-section and are commonly used in high-torque applications. Parallel keys are rectangular in shape and are commonly used in machine tools and automotive applications. Gib-head keys are tapered and are commonly used in marine and heavy machinery applications. Woodruff keys are semi-circular in shape and are commonly used in automotive applications.

Circular keys are important for ensuring the proper functioning of machinery and preventing damage to the shaft and hub caused by the transmission of torque. They are typically installed with a press fit or a clearance fit, depending on the application.