WOODRUFF KEY SIZES CHART


Woodruff key sizes chart according to ASME B17.2 standard. All dimensions are in inches.

Woodruff Key Sizes Chart
Key No. W x B F Height of Key E
C D
max. min. max. min.
202 1/16 x 1/4 0.248 0.109 0.104 0.109 0.104 1/64
202.5 1/16 x 5/16 0.311 0.140 0.135 0.140 0.135 1/64
302.5 3/32 x 5/16 0.311 0.140 0.135 0.140 0.135 1/64
203 1/16 x 3/8 0.374 0.172 0.167 0.172 0.167 1/64
303 3/32 x 3/8 0.374 0.172 0.167 0.172 0.167 1/64
403 1/8 x 3/8 0.374 0.172 0.167 0.172 0.167 1/64
204 1/16 x 1/2 0.491 0.203 0.198 0.194 0.188 3/64
304 3/32 x 1/2 0.491 0.203 0.198 0.194 0.188 3/64
404 1/8 x 1/2 0.491 0.203 0.198 0.194 0.188 3/64
305 3/32 x 5/8 0.612 0.250 0.245 0.240 0.234 1/16
405 1/8 x 5/8 0.612 0.250 0.245 0.240 0.234 1/16
505 5/32 x 5/8 0.612 0.250 0.245 0.240 0.234 1/16
605 3/16 x 5/8 0.612 0.250 0.245 0.240 0.234 1/16
406 1/8 x 3/4 0.740 0.313 0.308 0.303 0.297 1/16
506 5/32 x 3/4 0.740 0.313 0.308 0.303 0.297 1/16
606 3/16 x 3/4 0.740 0.313 0.308 0.303 0.297 1/16
806 1/4 x 3/4 0.740 0.313 0.308 0.303 0.297 1/16
507 5/32 x 7/8 0.866 0.375 0.370 0.365 0.359 1/16
607 3/16 x 7/8 0.866 0.375 0.370 0.365 0.359 1/16
707 7/32 x 7/8 0.866 0.375 0.370 0.365 0.359 1/16
807 1/4 x 7/8 0.866 0.375 0.370 0.365 0.359 1/16
608 3/16 x 1 0.992 0.438 0.433 0.428 0.422 1/16
708 7/32 x 1 0.992 0.438 0.433 0.428 0.422 1/16
808 1/4 x 1 0.992 0.438 0.433 0.428 0.422 1/16
1008 5/16 x 1 0.992 0.438 0.433 0.428 0.422 1/16
1208 3/8 x 1 0.992 0.438 0.433 0.428 0.422 1/16
609 3/16 x 1 1/8 1.114 0.484 0.479 0.475 0.469 5/64
709 7/32 x 1 1/8 1.114 0.484 0.479 0.475 0.469 5/64
809 1/4 x 1 1/8 1.114 0.484 0.479 0.475 0.469 5/64
1009 5/16 x 1 1/8 1.114 0.484 0.479 0.475 0.469 5/64
610 3/16 x 1 1/4 1.240 0.547 0.542 0.537 0.531 5/64
710 7/32 x 1 1/4 1.240 0.547 0.542 0.537 0.531 5/64
810 1/4 x 1 1/4 1.240 0.547 0.542 0.537 0.531 5/64
1010 5/16 x 1 1/4 1.240 0.547 0.542 0.537 0.531 5/64
1210 3/8 x 1 1/4 1.240 0.547 0.542 0.537 0.531 5/64
811 1/4 x 1 3/8 1.362 0.594 0.589 0.584 0.578 3/32
1011 5/16 x 1 3/8 1.362 0.594 0.589 0.584 0.578 3/32
1211 3/8 x 1 3/8 1.362 0.594 0.589 0.584 0.578 3/32
812 1/4 x 1 1/2 1.484 0.641 0.636 0.631 0.625 7/64
1012 5/16 x 1 1/2 1.484 0.641 0.636 0.631 0.625 7/64
1212 3/8 x 1 1/2 1.484 0.641 0.636 0.631 0.625 7/64

Note : Dimensions are in inches.

Note: Wx B - Nominal Key Size, F - Actual Length, E - Distance below Center.

Note: The dimensional tolerance of F is +0.000 -0.010.

Supplements:

Link Usage
Woodruff Key Sizes Calculator Calculator form of the woodruff key sizes chart.

Reference:

  • Oberg, E. , Jones ,F.D. , Horton H.L. , Ryffel H.H., (2016) . Machinery's Handbook . 30th edition.  Industrial Press Inc.
  • Oberg, E. , Jones ,F.D. , Horton H.L. , Ryffel H.H., (2012) . Machinery's Handbook . 29th edition.  Industrial Press Inc.
  • ASME B17.2-1967, Woodruff Keys and Keyseats