What is a keyway?

A keyway is a slot or groove cut into a shaft or hub in order to accommodate a key, which is a small metal piece used to connect two rotating parts and transfer torque. The keyway and key prevent the parts from slipping or rotating independently of each other.

Keyways are typically machined using a broaching or milling process and must be accurately sized and shaped to ensure a proper fit with the key. Keyways come in various shapes and sizes, such as square, rectangular, and tapered, depending on the specific application and type of key used.

Keyways are commonly used in machinery, motors, gears, pulleys, and other mechanical components where a secure and reliable connection between two rotating parts is required. Proper maintenance and periodic inspection of keyways are important to ensure smooth operation and prevent damage or wear over time.