Crankshaft Keys

A crankshaft key is a small but essential component used in the engine's rotating assembly. These machine keys are typically a woodruff key, often referred to as a half moon key due to its semi-circular shape. They are designed to fit into a keyway on the crankshaft and a corresponding groove on a pulley, gear, or sprocket. The purpose of the key is to lock these components together, preventing them from rotating independently of the crankshaft. This ensures that the timing of the engine's components, such as the timing belt or chain, remains precise and synchronized. The most common types you'll find are woodruff keys, which provide a strong and reliable connection.

These small but critical components are subject to significant forces, and over time they can become worn, sheared, or damaged. If a crankshaft key fails, it can lead to severe engine damage due to the loss of timing. Therefore, it's crucial to replace a damaged key with a new, high-quality part to maintain the proper function and longevity of the engine. Whether you're working on a new build or repairing an existing engine, using the correct woodruff key is vital for a successful project.