What is a woodruff key?

A woodruff key is a small, semicircular metal key used to secure a machine or engine component, such as a gear or pulley, to a shaft. The key fits into a keyway on the shaft and keyseat on the component, preventing the component from rotating independently of the shaft.

Woodruff keys are commonly used in automotive and industrial applications, where a secure and reliable connection between components is necessary. The design of a woodruff key ensures that the component is aligned correctly with the shaft, reducing the risk of misalignment or slippage.

Woodruff keys are available in various sizes and materials, such as steel or stainless steel, depending on the application requirements. They are easy to install and remove, making them a popular choice for many mechanical assemblies.