Machinery's Handbook, 31st Edition
INCH KEYS AND KEYSEATS 2557 Table 8. ANSI Standard Woodruff Keys ANSI/ASME B17.2-1967 (R2013)
+0.000 –0.010
+0.000 –0.010
B
B
+0.001 –0.000
+0.001 –0.000
D E
C E
W
W
Break corners 0.020 Max R
Break corners 0.020 Max R
F
F
Full Radius Type
Flat Bottom Type
Height of Key
Actual Length F +0.000 − 0.010
Nominal Key Size W × B 1 ∕ 16 × 1 ∕ 4 1 ∕ 16 × 5 ∕ 16 3 ∕ 32 × 5 ∕ 16 1 ∕ 16 × 3 ∕ 8 3 ∕ 32 × 3 ∕ 8 1 ∕ 8 × 3 ∕ 8 1 ∕ 16 × 1 ∕ 2 3 ∕ 32 × 1 ∕ 2 1 ∕ 8 × 1 ∕ 2 3 ∕ 32 × 5 ∕ 8 1 ∕ 8 × 5 ∕ 8 5 ∕ 32 × 5 ∕ 8 3 ∕ 16 × 5 ∕ 8 1 ∕ 8 × 3 ∕ 4 5 ∕ 32 × 3 ∕ 4 3 ∕ 16 × 3 ∕ 4 1 ∕ 4 × 3 ∕ 4 5 ∕ 32 × 7 ∕ 8 3 ∕ 16 × 7 ∕ 8 7 ∕ 32 × 7 ∕ 8 1 ∕ 4 × 7 ∕ 8 3 ∕ 16 × 1 7 ∕ 32 × 1 1 ∕ 4 × 1 5 ∕ 16 × 1 3 ∕ 8 × 1 3 ∕ 16 × 1 1 ∕ 8 7 ∕ 32 × 1 1 ∕ 8 1 ∕ 4 × 1 1 ∕ 8 5 ∕ 16 × 1 1 ∕ 8 3 ∕ 16 × 1 1 ∕ 4 7 ∕ 32 × 1 1 ∕ 4 1 ∕ 4 × 1 1 ∕ 4 5 ∕ 16 × 1 1 ∕ 4 3 ∕ 8 × 1 1 ∕ 4 1 ∕ 4 × 1 3 ∕ 8 5 ∕ 16 × 1 3 ∕ 8 3 ∕ 8 × 1 3 ∕ 8 1 ∕ 4 × 1 1 ∕ 2 5 ∕ 16 × 1 1 ∕ 2 3 ∕ 8 × 1 1 ∕ 2
Distance Below Center E
Key No.
C
D
Max. 0.109 0.140 0.140 0.172 0.172 0.172 0.203 0.203 0.203 0.250 0.250 0.250 0.250 0.313 0.313 0.313 0.313 0.375 0.375 0.375 0.375 0.438 0.438 0.438 0.438 0.438 0.484 0.484 0.484 0.484 0.547 0.547 0.547 0.547 0.547 0.594 0.594 0.594 0.641 0.641 0.641
Min. 0.104 0.135 0.135 0.167 0.167 0.167 0.198 0.198 0.198 0.245 0.245 0.245 0.245 0.308 0.308 0.308 0.308 0.370 0.370 0.370 0.370 0.433 0.433 0.433 0.433 0.433 0.479 0.479 0.479 0.479 0.542 0.542 0.542 0.542 0.542 0.589 0.589 0.589 0.636 0.636 0.636
Max. 0.109 0.140 0.140 0.172 0.172 0.172 0.194 0.194 0.194 0.240 0.240 0.240 0.240 0.303 0.303 0.303 0.303 0.365 0.365 0.365 0.365 0.428 0.428 0.428 0.428 0.428 0.475 0.475 0.475 0.475 0.537 0.537 0.537 0.537 0.537 0.584 0.584 0.584 0.631 0.631 0.631
Min. 0.104 0.135 0.135 0.167 0.167 0.167 0.188 0.188 0.188 0.234 0.234 0.234 0.234 0.297 0.297 0.297 0.297 0.359 0.359 0.359 0.359 0.422 0.422 0.422 0.422 0.422 0.469 0.469 0.469 0.469 0.531 0.531 0.531 0.531 0.531 0.578 0.578 0.578 0.625 0.625 0.625
202 202.5 302.5
0.248 0.311 0.311 0.374 0.374 0.374 0.491 0.491 0.491 0.612 0.612 0.612 0.612 0.740 0.740 0.740 0.740 0.866 0.866 0.866 0.866 0.992 0.992 0.992 0.992 0.992 1.114 1.114 1.114 1.114 1.240 1.240 1.240 1.240 1.240 1.362 1.362 1.362 1.484 1.484 1.484
1 ∕ 64 1 ∕ 64 1 ∕ 64 1 ∕ 64 1 ∕ 64 1 ∕ 64 3 ∕ 64 3 ∕ 64 3 ∕ 64 1 ∕ 16 1 ∕ 16 1 ∕ 16 1 ∕ 16 1 ∕ 16 1 ∕ 16 1 ∕ 16 1 ∕ 16 1 ∕ 16 1 ∕ 16 1 ∕ 16 1 ∕ 16 1 ∕ 16 1 ∕ 16 1 ∕ 16 1 ∕ 16 1 ∕ 16 5 ∕ 64 5 ∕ 64 5 ∕ 64 5 ∕ 64 5 ∕ 64 5 ∕ 64 5 ∕ 64 5 ∕ 64 5 ∕ 64 3 ∕ 32 3 ∕ 32 3 ∕ 32 7 ∕ 64 7 ∕ 64 7 ∕ 64
203 303 403 204 304 404 305 405 505 605 406 506 606 806 507 607 707 807 608 708
808 1008 1208 609 1009 610 710 810 709 809 1010 1210 811 1011 1211 812 1012 1212
All dimensions are given in inches. The key numbers indicate normal key dimensions. The last two digits give the nominal diame- ter B in eighths of an inch and the digits preceding the last two give the nominal width W in thirty- seconds of an inch.
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