A Woodruff key, also known as a half-moon key, is a type of mechanical fastener used to secure rotating machine elements such as gears, pulleys, and sprockets to shafts.
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Name | Woodruff key |
Material | Carbon steel/Stainless steel/Alloy steel/Brass |
Standards | GB,DIN, BSW, JIS, UNC, UNF, Non-standard, Customized Drawing |
Thread | Metric Coarse, Metric Fine, UNC, UNF, BSW, BSF. |
Sizes | M2-M10 Metc |
Finish | Carbon steel/ Nickeling/others/ |
Price | 0.02usd/pcs-0.30usd/pcs |
MOQ | Stardard item(Usually little hundred-little thousand)/determined if non-standard |
The key is semicircular or half-moon in shape, with a flat bottom and a rounded top.Woodruff keys are used to prevent relative rotation between the shaft and the attached component. The flat bottom of the key fits into the shaft slot, preventing axial movement, while the rounded top fits into the component's slot, preventing rotation.Common applications include automotive components, such as crankshafts and gears, as well as industrial machinery where precise alignment and torque transmission are essential.Woodruff keys provide a secure and reliable method of connecting rotating elements, and they are relatively easy to install and remove when necessary.
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