The Bock Woodruff Key is a semi-circular, concave key used in Bock compressors and refrigeration systems. It is designed to fit into a corresponding groove in both the shaft and the component, such as a pulley or gear, to securely lock them in place. Made from durable materials, the Woodruff key ensures proper alignment and efficient torque transmission, preventing slippage and ensuring the smooth operation of the system. It plays a critical role in maintaining system efficiency and extending the lifespan of the compressor.