Inch Square Keyways

All dimensions in inches
OD | Key | Shaft Keyway | Hub Keyway | ||||||
---|---|---|---|---|---|---|---|---|---|
Over | To (incl) | Key Size | W | H | A | B | C | D | R |
1/4 | 1/2 | 1/8 | 0.127 0.125 | 0.127 0.125 | 0.125 0.124 | 0.078 0.072 | 0.126 0.125 | 0.066 0.060 | 0.01 |
1/2 | 3/4 | 3/16 | 0.190 0.188 | 0.190 0.188 | 0.188 0.187 | 0.113 0.107 | 0.189 0.188 | 0.094 0.088 | 0.01 |
3/4 | 1 | 1/4 | 0.252 0.250 | 0.252 0.250 | 0.250 0.249 | 0.148 0.142 | 0.251 0.250 | 0.121 0.115 | 0.01 |
1 | 1 1/4 | 5/16 | 0.314 0.312 | 0.314 0.312 | 0.312 0.311 | 0.183 0.177 | 0.313 0.312 | 0.148 0.142 | 0.01 |
1 1/4 | 1 1/2 | 3/8 | 0.377 0.375 | 0.377 0.375 | 0.375 0.374 | 0.219 0.213 | 0.376 0.375 | 0.175 0.169 | 0.01 |
1 1/2 | 1 3/4 | 7/16 | 0.440 0.438 | 0.440 0.438 | 0.438 0.437 | 0.254 0.248 | 0.439 0.438 | 0.203 0.197 | 0.02 |
1 3/4 | 2 | 1/2 | 0.502 0.500 | 0.502 0.500 | 0.500 0.499 | 0.289 0.283 | 0.501 0.500 | 0.230 0.224 | 0.02 |
2 | 2 1/2 | 5/8 | 0.627 0.625 | 0.627 0.625 | 0.625 0.624 | 0.360 0.354 | 0.626 0.625 | 0.284 0.278 | 0.02 |
2 1/2 | 3 | 3/4 | 0.752 0.750 | 0.752 0.750 | 0.750 0.749 | 0.430 0.424 | 0.751 0.750 | 0.339 0.333 | 0.02 |
3 | 3 1/2 | 7/8 | 0.877 0.875 | 0.877 0.875 | 0.875 0.874 | 0.501 0.495 | 0.876 0.875 | 0.393 0.387 | 0.06 |
3 1/2 | 4 | 1 | 1.003 1.000 | 1.003 1.000 | 1.000 0.999 | 0.572 0.566 | 1.001 1.000 | 0.448 0.442 | 0.06 |
4 | 5 | 1 1/4 | 1.253 1.250 | 1.253 1.250 | 1.250 1.248 | 0.713 0.707 | 1.252 1.250 | 0.557 0.551 | 0.06 |
5 | 6 | 1 1/2 | 1.504 1.500 | 1.504 1.500 | 1.500 1.498 | 0.854 0.848 | 1.502 1.500 | 0.667 0.661 | 0.06 |