Woodruff Key Stock
Woodruff machine keys (AKA crankshaft keys) are a type of machine key with a profile that is rounded, to enable it to rock in place and thereby compensate for shaft stress as the key aligns and secures components to power transmission shafts. Woodruff keys vary by dimensions, package quantity, SAE number, and tensile strength & steel hardness, among other considerations. Generally, you should match key stock hardness and strength to that of the shaft to ensure best key performance. For more on machine keys, see our oversized key stock, undersized key stock, and step key stock.