What is a Woodruff key?

A Woodruff key is specifically designed with a semi-circular shape that fits into a corresponding groove in a machine part, usually a shaft or a hub. This design allows for a secure connection between the shaft and other rotating components, ensuring proper alignment and transferring torque effectively. The semi-circular profile of the Woodruff key provides a larger surface area for contact, which helps to distribute loads more evenly, reducing the risk of wear or failure under operational stresses.

The distinct shape also facilitates easy installation and removal, as the key can be slipped into and out of its groove without difficulty. This functionality is crucial in applications where maintenance and adjustments are required, such as in motors or rotating machinery. By using a Woodruff key, engineers ensure that parts remain securely engaged while maintaining optimal performance.