What is another name for a Kennedy key?

• A. Tangential key
• B. Woodruff key
• C. Saddle key
• D. Roll pin

Answer: (A)

The Kennedy key is commonly referred to as a tangential key. This type of key is designed to transmit torque between a shaft and a hub or component without protruding from the component's surface, allowing for a smoother transition and alignment. The tangential design allows it to resist shearing forces more effectively and is also often used in specific applications due to its ability to fit snugly in keyways, providing stability and precision.

In contrast, options such as the Woodruff key, saddle key, and roll pin refer to different types of fastening and keying mechanisms that serve different purposes and have distinct geometries and applications. Understanding the distinctions among these key types helps in selecting the appropriate one for engineering and mechanical applications.