Bore, Keyway & Set Screw Information

Standard Keyway

& Setscrew Sizes 

Standard Bore

Tolerances 

Standard

Setscrew Locations

Bore Keyway Setscrew
3/8
1/2 to 9/16
5/8 to 7/8
15/16 to 1-1/4
1-5/16 to 1-3/8
1-7/16 to 1-3/4
1-13/16 to 2-1/4
2-5/16 to 2-3/4
2-13/16 to 3-1/4
3-5/16 to 3-3/4
3-13/16 to 4-1/2
4-9/16 to 5-1/2
5-9/16 to 6-1/2
6-9/16 to 7-1/2
7-9/16 to 9
9-1/16 to 11
None
1/8 x 1/16
3/16 x 3/32
1/4 x 1/8
5/16 x 5/32
3/8 x 3/16
1/2 x 1/4
5/8 x 5/16
3/4 x 3/8
7/8 x 7/16
1 x 1/2
1-1/4 x 5/8
1-1/2 x 3/4
1-3/4 x 3/4
2 x 3/4
2-1/2 x 7/8
--
10-24
1/4 - 20
5/16 - 18
3/8 - 16
3/8 - 16
1/2 - 13
1/2 - 13
5/8 - 11
5/8 - 11
3/4 - 10
3/4 - 10
3/4 - 10
7/8 - 9
7/8 - 9
7/8 - 9
Bore Tolerance
0 to 2
2 to 3
3 to 4
Over 4
+.002, -.000
+.003, -.000
+.004, -.000
+.005, -.000

If one setscrew is furnished the location

will be 0°. If two setscrews are furnished

the locations will be 0° and 90°, unless

otherwise specified.

 

Standard Keyway Dimensions

Bore Width Depth
1/2
9/16
5/8
11/16
3/4
13/16
7/8
7/8
15/16
1
1-1/16
1-1/8
1-3/16
1-1/4
1-1/4
1-5/16
1-3/8
1-7/16
1-1/2
1-9/16
1-5/8
1-11/16
1-3/4
1-13/16
1-7/8
1-15/16
1/8
1/8
3/16
3/16
3/16
3/16
3/16
1/4
1/4
1/4
1/4
1/4
1/4
1/4
5/16
5/16
5/16
3/8
3/8
3/8
3/8
3/8
3/8
1/2
1/2
1/2
.555
.618
.704
.768
.832
.895
.959
.982
1.046
1.109
1.173
1.236
1.299
1.362
1.386
1.450
1.513
1.600
1.664
1.728
1.791
1.854
1.917
2.029
2.091
2.156
Bore Width Depth
2
2-1/16
2-1/8
2-3/16
2-1/4
2-5/16
2-3/8
2-7/16
2-1/2
2-9/16
2-5/8
2-11/16
2-3/4
2-13/16
2-7/8
2-15/16
3
3-1/16
3-1/8
3-3/16
3-1/4
3-5/16
3-3/8
3-7/16
3-1/2
3-9/16
1/2
1/2
1/2
1/2
1/2
5/8
5/8
5/8
5/8
5/8
5/8
5/8
5/8
3/4
3/4
3/4
3/4
3/4
3/4
3/4
3/4
7/8
7/8
7/8
7/8
7/8
2.218
2.283
2.345
2.409
2.472
2.584
2.646
2.711
2.773
2.837
2.900
2.964
3.027
3.138
3.200
3.265
3.327
3.392
3.456
3.519
3.582
3.693
3.757
3.820
3.884
3.947
Bore Width Depth
3-5/8
3-11/16
3-3/4
3-13/16
3-7/8
3-15/16
4
4-1/16
4-1/8
4-3/16
4-1/4
4-5/16
4-3/8
4-7/16
4-1/2
4-9/16
4-5/8
4-11/16
4-3/4
4-13/16
4-7/8
4-15/16
5
5-1/16
5-1/8
5-3/16
7/8
7/8
7/8
1
1
1
1
1
1
1
1
1
1
1
1
1-1/4
1-1/4
1-1/4
1-1/4
1-1/4
1-1/4
1-1/4
1-1/4
1-1/4
1-1/4
1-1/4
4.010
4.074
4.137
4.248
4.312
4.375
4.438
4.502
4.565
4.629
4.692
4.755
4.819
4.882
4.945
5.103
5.167
5.231
5.294
5.358
5.421
5.485
5.548
5.611
5.675
5.738
Bore Width Depth
5-1/4
5-5/16
5-3/8
5-7/16
5-1/2
5-9/16
5-5/8
5-11/16
5-3/4
5-13/16
5-7/8
5-15/16
6
6-1/16
6-1/8
6-3/16
6-1/4
6-5/16
6-3/8
6-7/16
6-1/2
6-9/16
6-5/8
6-11/16
6-3/4
6-13/16
1-1/4
1-1/4
1-1/4
1-1/4
1-1/4
1-1/2
1-1/2
1-1/2
1-1/2
1-1/2
1-1/2
1-1/2
1-1/2
1-1/2
1-1/2
1-1/2
1-1/2
1-1/2
1-1/2
1-1/2
1-1/2
1-3/4
1-3/4
1-3/4
1-3/4
1-3/4
5.802
5.865
5.928
5.992
6.055
6.213
6.277
6.340
6.404
6.467
6.531
6.594
6.658
6.721
6.785
6.848
6.911
6.975
7.038
7.101
7.165
7.323
7.386
7.450
7.513
7.577
Bore Width Depth
6-7/8
6-15/16
7
7-1/16
7-1/8
7-3/16
7-1/4
7-5/16
7-3/8
7-7/16
7-1/2
7-9/16
7-5/8
7-11/16
7-3/4
7-13/16
7-7/8
7-15/16
8
8-1/16
8-1/8
8-3/16
8-1/4
8-5/16
8-3/8
8-7/16
8-1/2
1-3/4
1-3/4
1-3/4
1-3/4
1-3/4
1-3/4
1-3/4
1-3/4
1-3/4
1-3/4
1-3/4
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
7.640
7.704
7.767
7.831
7.894
7.958
8.021
8.084
8.148
8.211
8.274
8.433
8.496
8.560
8.623
8.687
8.750
8.813
8.877
8.940
9.004
9.067
9.131
9.194
9.257
9.321
9.384

Key Depth Tolerance is +.010/-/000 for all standard keyways

   

Bore Size
Chart
08 = 1/2"       23 = 1-7/16"         38 = 2-3/8"
10 = 5/8"       24 = 1-1/2"           39 = 2-7/16"
12 = 3/4"       26 = 1-5/8"           42 = 2-5/8"
14 = 7/8"       28 = 1-3/4"           43 = 2-11/16"
15 = 15/16"    30 = 1-7/8"          46 = 2-7/8"
16 = 1"          31 = 1-15/16"       47 = 2-15/16"
18 = 1-1/8"     32 = 2"                50 = 3-1/8"
19 = 1-3/16"   34 = 2-1/8"           54 = 3-3/8"
20 = 1-1/4"     35 = 2-3/16"         55 = 3-7/16"
22 = 1-3/8"     36 = 2-1/4"