A woodruff key is part circular or rectangular looking component, commonly used in automotive and industrial applications. The purpose of the key is to transfer the torque load from a shaft to the working gear. The key’s main function is as a fail-safe or sacrificial device to ensure that there is no damage to the gears in the event that the gears become jammed; the key will break or shear before damage to the gears occur.

This type of key was developed by W.N. Woodruff of who was awarded the John Scott Medal by the Franklin Institute for his invention in 1888.

Part No.DescribtionThicknessDiameter
1B8735WOODRUFFKEY3/323/8
1B8701WOODRUFFKEY3/321/2
3H1489WOODRUFFKEY3/321/2
1B8703WOODRUFFKEY3/325/8
5H2532WOODRUFFKEY1/83/8
1B8702WOODRUFFKEY1/81/2
1B8704WOODRUFFKEY1/85/8
1B8706WOODRUFFKEY1/83/4
1B8705WOODRUFFKEY5/325/8
1B8707WOODRUFFKEY5/323/4
1B8709WOODRUFFKEY5/327/8
8F7689WOODRUFFKEY5/327/8
1B8708WOODRUFFKEY3/163/4
5H2671WOODRUFFKEY3/163/4
1B8710WOODRUFFKEY3/167/8
8M3498WOODRUFFKEY3/167/8
1B8712WOODRUFFKEY3/161
1B8715WOODRUFFKEY3/1611/8
3K4723WOODRUFFKEY7/321
2B9373WOODRUFFKEY1/43/4
1B8736WOODRUFFKEY1/47/8
Part No.DescribtionThicknessDiameter
1B8714WOODRUFFKEY1/41
1B8716WOODRUFFKEY1/411/8
1B8719WOODRUFFKEY1/411/4
1B8722WOODRUFFKEY1/411/2
1B8737WOODRUFFKEY5/1611/8
1B8721WOODRUFFKEY5/1613/8
1B8742WOODRUFFKEY5/1623/4
1B8741WOODRUFFKEY3/811/2
1B8743WOODRUFFKEY3/823/4
1B8744WOODRUFFKEY3/823/4
1B8745WOODRUFFKEY1/223/4
Part No.DescribtionThicknessLength
9T7770WOODRUFFKEY3/161 7/8
5K5887WOODRUFFKEY1/42
1D1158WOODRUFFKEY1/42 1/2
0T0217WOODRUFFKEY1/24