Elastomer jaw couplings GN 2241 can transmit very high torques while compensating for shaft misalignments and runout tolerances. They are preferred in applications where the focus lies on pure torque and power transmission.
The choice of three coupling spiders with different hardness values allows the properties of the coupling to be optimally matched to the specific requirements. The use of set screws for clamping and the simple plug-in installation make jaw couplings very easy to assemble.
With the bore code K, the keyway is always integrated into both bores d2 and d3.
Hardness
80 Shore A, blueBS
92 Shore A, whiteWS
98 Shore A, redRS
RoHS
| B | Without keyway |
| K | With keyway (from d1 = 30 mm) |
| d1 | d2 - d3 +0.001 Bore Recommended shaft tolerance -0.001 | |||||||||||||||
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| 0.55 | 3-3/16 | 3-1/4 | 4-3/16 | 4-1/4 | 5-3/16 | 5-1/4 | 6-3/16 | 6-1/4 | - | - | - | - | - | - | - | - |
| 0.79 | 5-3/16 | 5-1/4 | 5-5/16 | 5-3/8 | 6-3/16 | 6-1/4 | 6-5/16 | 6-3/8 | 8-3/16 | 8-1/4 | 8-5/16 | 8-3/8 | - | - | - | - |
| 1.18 | 8-5/16 | 8-3/8 | 8-1/2 | 8-5/8 | 10-5/16 | 10-3/8 | 10-1/2 | 10-5/8 | 12-5/16 | 12-3/8 | 12-1/2 | 12-5/8 | 14-5/16 | 14-3/8 | 14-1/2 | 14-5/8 |
| 1.57 | 12-3/8 | 12-1/2 | 12-5/8 | 12-3/4 | 14-3/8 | 14-1/2 | 14-5/8 | 14-3/4 | 15-3/8 | 15-1/2 | 15-5/8 | 15-3/4 | 16-3/8 | 16-1/2 | 16-5/8 | 16-3/4 |
| 2.17 | 18-1/2 | 18-5/8 | 18-3/4 | 18-7/8 | 19-1/2 | 19-5/8 | 19-3/4 | 19-7/8 | 20-1/2 | 20-5/8 | 20-3/4 | 20-7/8 | 25-1/2 | 25-5/8 | 25-3/4 | 25-7/8 |
| d1 | d4 | l1 | l2 Recommended shaft insertion depth | l3 | s Recommended installation spacing | Tightening torque of the screw in Nm ≈ |
|---|---|---|---|---|---|---|
| 0.55 | M 3 | 0.87 | 0.28 | 0.14 | 0.04 | 0.7 |
| 0.79 | M 3 | 1.18 | 0.39 | 0.20 | 0.04 | 0.7 |
| 1.18 | M 4 | 1.38 | 0.43 | 0.22 | 0.06 | 1.7 |
| 1.57 | M 5 | 2.60 | 0.98 | 0.33 | 0.08 | 4 |
| 2.17 | M 6 | 3.07 | 1.18 | 0.41 | 0.08 | 7 |
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If the ambient temperature is greater than 86 °F (30 °C), the rated torque and the maximum torque must be adjusted using the temperature correction factors. |
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Ambient temperature |
Temperature correction factor |
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-4 °F up to + 86 °F (-20 °C up to +30 °C) |
1 |
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+86 °F up to +104 °F (+30 °C up to +40 °C) |
0.8 |
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+104 °F up to +140 °F (+40 °C up to +60 °C) |
0.7 |
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Like all mechanical parts, shafts are subjected to manufacturing and assembly tolerances that generally cannot be entirely eliminated even with extensive technical measures. |
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Error type |
Misalignment diagram |
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Lateral |
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Angular |
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Axial |
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Runout |
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For correct fastening of the coupling hubs, the shaft must be installed according to the recommended shaft insertion depth l2. The shaft insertion depth l2 is specified in the standard sheet of the respective coupling. |
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The diagrams show the change in static torsional stiffness within the permissible operating temperature range, under the assumption that the static torsional stiffness at 68°F (20 °C) is 100 percent. The torsional stiffness of the couplings decreases with increasing temperature. |
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When the shaft ends are installed in eccentric arrangements, the coupling constantly attempts to return to its neutral position. The resulting force is referred to as restoring force. |
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| Min | Max | Price |
|---|---|---|
| 1 | 4 | Can$68.59 |
| 5 | 9 | Can$62.87 |
| 10 | 24 | Can$57.16 |
| ≥ 25 | Can$51.44 |
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