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ANSI-B17.1              
Keyway Dimensions
                 
 

Size

 

Shaft Dia.   Size Shaft Dia.
3/8 .375 / .376 .093 / .095 .432 / .442   2-5/16 2.312 / 2.314 .625 / .628 2.587 / 2.597
7/16 .437 / .438 .093 / .095 .493 / .503   2-3/8 2.375 / 2.377 .625 / .628 2.651 / 2.661
1/2 .500 / .501 .125 / .127 .560 / .570   2-7/16 2.437 / 2.439 .625 / .628 2.714 / 2.724
9/16 .562 / .563 .125 / .127 .623 / .633   2-1/2 2.500 / 2.502 .625 / .628 2.778 / 2.788
5/8 .625 / .626 .187 / .189 .709 / .719   2-9/16 2.562 / 2.564 .625 / .628 2.841 / 2.851
11/16 .687 / .688 .187 / .189 .773 / .783   2-5/8 2.625 / 2.627 .625 / .628 2.905 / 2.915
3/4 .750 / .751 .187 / .189 .837 / .847   2-11/16 2.687 / 2.689 .625 / .628 2.968 / 2.978
13/16 .812 / .814 .187 / .189 .900 / .910   2-3/4 2.750 / 2.752 .625 / .628 3.032 / 3.042
7/8 .875 / .876 .187 / .189 .964 / .974   2-13/16 2.812 / 2.814 .750 / .753 3.142 / 3.152
15/16 .937 / .938 .250 / .252 1.051 / 1.061   2-7/8 2.875 / 2.877 .750 / .753 3.205 / 3.215
1 1.000 / 1.002 .250 / .252 1.114 / 1.124   2-15/16 2.937 / 2.939 .750 / .753 3.269 / 3.279
1-1/16 1.062 / 1.064 .250 / .252 1.178 / 1.188   3 3.000 / 3.002 .750 / .753 3.332 / 3.342
1-1/8 1.125 / 1.127 .250 / .252 1.241 / 1.251   3-1/16 3.062 / 3.064 .750 / .753 3.396 / 3.406
1-3/16 1.187 / 1.189 .250 / .252 1.304 / 1.314   3-1/8 3.125 / 3.127 .750 / .753 3.459 / 3.469
1-1/4 1.250 / 1.252 .250 / .252 1.367 / 1.377   3-3/16 3.187 / 3.189 .750 / .753 3.523 / 3.533
1-5/16 1.312 / 1.314 .312 / .314 1.455 / 1.465   3-1/4 3.250 / 3.252 .750 / .753 3.586 / 3.596
1-3/8 1.375 / 1.377 .312 / .314 1.518 / 1.528   3-5/16 3.312 / 3.314 .875 / .878 3.696 / 3.706
1-7/16 1.437 / 1.439 .375 / .377 1.605 / 1.615   3-3/8 3.375 / 3.377 .875 / .878 3.760 / 3.770
1-1/2 1.500 / 1.502 .375 / .377 1.669 / 1.679   3-7/16 3.437 / 3.439 .875 / .878 3.823 / 3.833
1-9/16 1.562 / 1.564 .375 / .377 1.732 / 1.742   3-1/2 3.500 / 3.502 .875 / .878 3.887 / 3.897
1-5/8 1.625 / 1.627 .375 / .377 1.796 / 1.806   3-9/16 3.562 / 3.564 .875 / .878 3.950 / 3.960
1-11/16 1.687 / 1.689 .375 / .377 1.859 / 1.869   3-5/8 3.625 / 3.627 .875 / .878 4.014 / 4.024
1-3/4 1.750 / 1.752 .375 / .377 1.922 / 1.932   3-11/16 3.687 / 3.689 .875 / .878 4.077 / 4.087
1-13/16 1.812 / 1.814 .375 / .377 2.032 / 2.042   3-3/4 3.750 / 3.752 .875 / .878 4.141 / 4.151
1-7/8 1.875 / 1.877 .500 / .502 2.096 / 2.106   3-13/16 3.812 / 3.814 1.000 / 1.003 4.251 / 4.261
1-5/16 1.937 / 1.939 .500 / .502 2.160 / 2.170   3-7/8 3.875 / 3.877 1.000 / 1.003 4.314 / 4.324
2 2.000 / 2.002 .500 / .502 2.223/2.233   3-15/16 3.937 / 3.939 1.000 / 1.003 4.378 / 4.388
2-1/16 2.062 / 2.064 .500 / .502 2.287 / 2.297   4 4.000 / 4.002 1.000 / 1.003 4.441 / 4.451
2-1/8 2.125 / 2.127 .500 / .502 2.350 / 2.360   4-1/16 4.062 / 4.064 1.000 / 1.003 4.627 / 4.637
2-3/16 2.187 / 2.189 .500 / .502 2.414 / 2.424   4-1/8 4.125 / 4.127 1.000 / 1.003 4.695 / 4.705
2-1/4 2.250 / 2.252 .500 / .502 2.477 / 2.487   4-3/16 4.187 / 4.189 1.000 / 1.003 4.732 / 4.742

 

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