Keyways provided on GAM couplings
The frictional shaft/hub connections of the radial clamping hubs and conical bushings found on GAM couplings do NOT require keyways for zero backlash torque transmission. Keyways are not recommended by GAM as they can actually introduce backlash into machine systems overtime. While not recommended, they can still be machined into the couplings upon request.
Below is a PDF link and a list of the standard keyway dimensions provided if requested. If other keyways are required, a shaft end detail drawing that shows the keyway dimensions must be provided to GAM.
| KEYWAY DIMENSIONS FOR METRIC SHAFT SIZES | ||||||
|---|---|---|---|---|---|---|
| SHAFT DIA – D (mm) | KEY SIZE (WxH) (mm) |
WIDTH – W (mm) |
HEIGHT – H (mm) |
|||
| > | ≤ | |||||
| 6 | 8 | 2X2 | 2 | +0.060 +0.020 |
1.0 | +0.1 0 |
| 8 | 10 | 3x3 | 3 | +0.060 +0.020 |
1.4 | +0.1 0 |
| 10 | 12 | 4x4 | 4 | +0.078 +0.030 |
1.8 | +0.1 0 |
| 12 | 17 | 5x5 | 5 | +0.078 +0.030 |
2.3 | +0.1 0 |
| 17 | 22 | 6x6 | 6 | +0.078 +0.030 |
2.8 | +0.1 0 |
| 22 | 30 | 8x7 | 8 | +0.098 +0.040 |
3.3 | +0.2 0 |
| 30 | 38 | 10x8 | 10 | +0.098 +0.040 |
3.3 | +0.2 0 |
| 38 | 44 | 12x8 | 12 | +0.120 +0.050 |
3.3 | +0.2 0 |
| 44 | 50 | 14x9 | 14 | +0.120 +0.050 |
3.8 | +0.2 0 |
| 50 | 58 | 16x10 | 16 | +0.120 +0.050 |
4.3 | +0.2 0 |
| 58 | 65 | 18x11 | 18 | +0.120 +0.050 |
4.4 | +0.2 0 |
| 65 | 75 | 20x12 | 20 | +0.149 +0.065 |
4.9 | +0.2 0 |
| 75 | 85 | 22x14 | 22 | +0.149 +0.065 |
5.4 | +0.2 0 |
| 85 | 95 | 25x14 | 25 | +0.149 +0.065 |
5.4 | +0.2 0 |
| 95 | 110 | 28x16 | 28 | +0.149 +0.065 |
6.4 | +0.2 0 |
| KEYWAY DIMENSIONS FOR IMPERIAL SHAFT SIZES | ||||||
|---|---|---|---|---|---|---|
| SHAFT DIA – D (in.) | KEY SIZE (WxH) (in.) |
WIDTH – W (in.) |
HEIGHT – H (in.) |
|||
| > | ≤ | |||||
| 0.250 | 0.500 | 1/8 | 0.1250 | +0.001 0 |
0.060 | +0.006 0 |
| 0.500 | 0.750 | 3/16 | 0.1875 | +0.001 0 |
0.088 | +0.006 0 |
| 0.750 | 1.00 | 1/4 | 0.2500 | +0.001 0 |
0.115 | +0.006 0 |
| 1.00 | 1.25 | 5/16 | 0.3125 | +0.001 0 |
0.142 | +0.006 0 |
| 1.25 | 1.50 | 3/8 | 0.3750 | +0.001 0 |
0.169 | +0.006 0 |
| 1.50 | 1.75 | 7/16 | 0.4375 | +0.001 0 |
0.197 | +0.006 0 |
| 1.75 | 2.00 | 1/2 | 0.5000 | +0.001 0 |
0.224 | +0.006 0 |
| 2.00 | 2.50 | 5/8 | 0.6250 | +0.001 0 |
0.278 | +0.006 0 |
| 2.50 | 3.00 | 3/4 | 0.7500 | +.001 0 |
0.333 | +0.006 0 |
Zero-Backlash Servo Couplings
Bellows Couplings
Zero-backlash, and the most torsionally stiff, for dynamic applications while still compensating for shaft misalignments
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Elastomer Couplings
Zero backlash with shaft misalignment compensation and vibration dampening
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Distance Couplings
Span axial lengths up to 20ft without additional intermediate bearings
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