Keyshaft™ Keyway Tolerances
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The following table defines the tolerances that Excalibur bars are produced with respect to keyway size and tolerance.
U.S. Standard Keyshaft Stock Sizes
Shaft Diameter |
Key Size |
Max Key Height |
Min Key Height |
Keyway Width Tolerance |
5/16 (0.313) |
3/32 (.093) |
0.263 |
0.248 |
(+.002/-.000) |
3/8 (0.375) |
3/32 (0.093) |
0.322 |
0.307 |
(+.002/-.000) |
7/16 (0.438) |
3/32 (0.093) |
0.368 |
0.353 |
(+.002/-.000) |
1/2 (0.500) |
1/8 (0.125) |
0.430 |
0.415 |
(+.002/-.000) |
9/16 (0.563) |
1/8 (0.125) |
0.493 |
0.478 |
(+.002/-.000) |
5/8 (0.625) |
3/16 (0.188) |
0.517 |
0.502 |
(+.002/-.000) |
11/16 (0.688) |
3/16 (0.188) |
0.581 |
0.566 |
(+.002/-.000) |
3/4 (0.750) |
3/16 (0.188) |
0.644 |
0.629 |
(+.002/-.000) |
13/16 (.813) |
3/16 (0.188) |
0.708 |
0.693 |
(+.002/-.000) |
7/8 (0.875) |
3/16 (0.188) |
0.771 |
0.756 |
(+.002/-.000) |
15/16 (0.938) |
1/4 (0.250) |
0.796 |
0.781 |
(+.002/-.000) |
1 (1.000) |
1/4 (0.250) |
0.859 |
0.844 |
(+.002/-.000) |
1 1/16 (1.063) |
1/4 (0.250) |
0.923 |
0.908 |
(+.002/-.000) |
1 1/8 (1.125) |
1/4 (0.250) |
0.986 |
0.971 |
(+.002/-.000) |
1 3/16 (1.188) |
1/4 (0.250) |
1.049 |
1.034 |
(+.002/-.000) |
1 1/4 (1.250) |
1/4 (0.250) |
1.112 |
1.097 |
(+.002/-.000) |
1 5/16 (1.313) |
5/16 (0.313) |
1.137 |
1.122 |
(+.002/-.000) |
1 3/8 (1.375) |
5/16 (0.313) |
1.201 |
1.186 |
(+.002/-.000) |
1 7/16 (1.438) |
3/8 (0.375) |
1.225 |
1.210 |
(+.002/-.000) |
1 1/2 (1.500) |
3/8 (0.375) |
1.289 |
1.274 |
(+.002/-.000) |
1 5/8 (1.625) |
3/8 (0.375) |
1.416 |
1.401 |
(+.002/-.000) |
1 11/16 (1.688) |
3/8 (0.375) |
1.479 |
1.464 |
(+.002/-.000) |
1 3/4 (1.750) |
3/8 (0.375) |
1.542 |
1.527 |
(+.002/-.000) |
1 15/16 (1.938) |
1/2 (0.500) |
1.655 |
1.640 |
(+.002/-.000) |
2 (2.000) |
1/2 (0.500) |
1.718 |
1.704 |
(+.002/-.000) |
2 3/16 (2.188) |
1/2 (0.500) |
1.909 |
1.894 |
(+.002/-.000) |
2 1/4 (2.250) |
1/2 (0.500) |
1.972 |
1.957 |
(+.002/-.000) |
2 7/16 (2.438) |
5/8 (0.625) |
2.084 |
2.070 |
(+.003/-.000) |
2 1/2 (2.500) |
5/8 (0.625) |
2.148 |
2.133 |
(+.003/-.000) |
2 3/4 (2.750) |
5/8 (0.625) |
2.402 |
2.387 |
(+.003/-.000) |
3 (3.000) |
3/4 (0.750) |
2.577 |
2.562 |
(+.003/-.000) |
Metric Keyshaft Stock Sizes
Shaft Diameter |
Key Size |
Max Key Height |
Min Key Height |
Keyway Width Tolerance |
8mm |
2mm |
6.88mm |
6.5mm |
(+0.05mm/-0.0mm) |
10mm |
3mm |
8.27mm |
7.89mm |
(+0.05mm/-0.0mm) |
12mm |
4mm |
9.67mm |
9.29mm |
(+0.05mm/-0.0mm) |
14mm |
5mm |
11.05mm |
10.67mm |
(+0.05mm/-0.0mm) |
15mm |
5mm |
12.08mm |
11.70mm |
(+0.05mm/-0.0mm) |
18mm |
6mm |
14.50mm |
14.42mm |
(+0.05mm/-0.0mm) |
20mm |
6mm |
16.55mm |
16.17mm |
(+0.05mm/-0.0mm) |
22mm |
6mm |
18.59mm |
18.21mm |
(+0.05mm/-0.0mm) |
24mm |
8mm |
19.34mm |
18.96mm |
(+0.05mm/-0.0mm) |
25mm |
8mm |
20.36mm |
19.98mm |
(+0.05mm/-0.0mm) |
40mm |
12mm |
33.10mm |
32.72mm |
(+0.05mm/-0.0mm) |
45mm |
14mm |
36.92mm |
36.54mm |
(+0.05mm/-0.0mm) |
50mm |
14mm |
42.02mm |
41.64mm |
(+0.05mm/-0.0mm) |
