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. Describtion Thickness Diameter
1B8735 WOODRUFF KEY 3/32 3/8
1B8701 WOODRUFF KEY 3/32 1/2
3H1489 WOODRUFF KEY 3/32 1/2
1B8703 WOODRUFF KEY 3/32 5/8
5H2532 WOODRUFF KEY 1/8 3/8
1B8702 WOODRUFF KEY 1/8 1/2
1B8704 WOODRUFF KEY 1/8 5/8
1B8706 WOODRUFF KEY 1/8 3/4
1B8705 WOODRUFF KEY 5/32 5/8
1B8707 WOODRUFF KEY 5/32 3/4
1B8709 WOODRUFF KEY 5/32 7/8
8F7689 WOODRUFF KEY 5/32 7/8
1B8708 WOODRUFF KEY 3/16 3/4
5H2671 WOODRUFF KEY 3/16 3/4
1B8710 WOODRUFF KEY 3/16 7/8
8M3498 WOODRUFF KEY 3/16 7/8
1B8712 WOODRUFF KEY 3/16 1
1B8715 WOODRUFF KEY 3/16 1 1/8
3K4723 WOODRUFF KEY 7/32 1
2B9373 WOODRUFF KEY 1/4 3/4
1B8736 WOODRUFF KEY 1/4 7/8
Part No. Describtion Thickness Diameter
1B8714 WOODRUFF KEY 1/4 1
1B8716 WOODRUFF KEY 1/4 1 1/8
1B8719 WOODRUFF KEY 1/4 1 1/4
1B8722 WOODRUFF KEY 1/4 1 1/2
1B8737 WOODRUFF KEY 5/16 1 1/8
1B8721 WOODRUFF KEY 5/16 1 3/8
1B8742 WOODRUFF KEY 5/16 2 3/4
1B8741 WOODRUFF KEY 3/8 1 1/2
1B8743 WOODRUFF KEY 3/8 2 3/4
1B8744 WOODRUFF KEY 3/8 2 3/4
1B8745 WOODRUFF KEY 1/2 2 3/4
Part No. Describtion Thickness Length
9T7770 WOODRUFF KEY 3/16 1 7/8
5K5887 WOODRUFF KEY 1/4 2
1D1158 WOODRUFF KEY 1/4 2 1/2
0T0217 WOODRUFF KEY 1/2 4