The most common key shapes are rectangular or tapered and are typically made of steel.Ī keyway is a slot (groove or pocket) in a hub of a pulley, gear, sprocket, or other rotating power devices to receive a key, and these slots are commonly cut on key-seating machines or by broaching, milling, planing, shaping, and slotting. Shaft Keys are made of varied types of materials and also come in different shapes and sizes. A keyed joint may allow relative axial movement between the parts. The whole system is called a keyed joint. One part of the Shaft key fits into a precut slot in the shaft known as a key seat and the other part fits into a slot in the hub called a keyway. For a shaft key to function properly, both the shaft and rotating elements ( gear, pulley, and coupling) must have a keyway and a keyseat. ![]() A shaft key prevents a relative rotation between the two parts, and may enable torque transmission to occur. ![]() A Shaft key is a piece of metal used to connect a rotating machine element to the shaft.
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