Unibridge Woodruff key DIN 6888 Steel C45+C Plain rounded shape half moon keys connect gears frequently

Woodruff keys serve as a fail-safe that prevents the shearing of expensive parts exposed to extreme stresses.Woodruff keys are available in various materials and key stock, ranging from high-carbon steel to stainless steel. They're fitted into the woodruff keyseat, which is a half-moon slot cut into the rotating shaft, with a keyway or a Woodruff cutter. The diameter of a half-round key is usually smaller than the shaft's diameter to fit into the semicircular keyway on the shaft. Half-round keys can be used for torque transmission in one direction, as their shape only allows sufficient contact area in one orientation. Due to their shape, half-round keys require careful alignment and positioning during installation.