JW Winco

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GN 2240 Elastomer Jaw Couplings with Clamping Hub


GN 2240 Elastomer Jaw Couplings with Clamping Hub Bore code: B - Without keyway
Hardness: RS - 98 Shore A, red
Bore code: B - Without keyway
Hardness: RS - 98 Shore A, red
GN 2240 Elastomer Jaw Couplings with Clamping Hub Bore code: B - Without keyway
Hardness: RS - 98 Shore A, red GN 2240 Elastomer Jaw Couplings with Clamping Hub Bore code: B - Without keyway
Hardness: BS - 80 Shore A, blue GN 2240 Elastomer Jaw Couplings with Clamping Hub Bore code: B - Without keyway
Hardness: WS - 92 Shore A, white GN 2240 Elastomer Jaw Couplings with Clamping Hub Bore code: K - With keyway (from d<sub>1</sub> = 30)
Hardness: BS - 80 Shore A, blue GN 2240 Elastomer Jaw Couplings with Clamping Hub Bore code: K - With keyway (from d<sub>1</sub> = 30)
Hardness: RS - 98 Shore A, red GN 2240 Elastomer Jaw Couplings with Clamping Hub Bore code: K - With keyway (from d<sub>1</sub> = 30)
Hardness: WS - 92 Shore A, white

Product description


Elastomer jaw couplings GN 2240 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 clamping hubs and 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.


Anodized, natural color
Coupling spider
Thermoplastic polyurethane (TPU)
Temperature resistant up to 60 °CHardness
80 Shore A, blueBS
92 Shore A, whiteWS
98 Shore A, redRS
Socket cap screws DIN 912
Steel, blackened
Temperature range: -20 °C up to +60 °C



Coupling Spiders GN 2240.1

Technical drawing

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GN 2240 Elastomer Jaw Couplings with Clamping Hub sketch

Article options / Table

Bore code

BWithout keyway
KWith keyway (from d1 = 30)
Show / Hide columns
d1d2 - d3 H8
shaft tolerance h7
Show / Hide columns
shaft insertion depth
installation spacing
14M 2M 1,6*2273,545*1
20M 2,5-301056,5-1
30M 4M 3**35115,51011**1,5
40M 5-66258,514-2
55M 6-783010,520-2
* for bore d2 / d3 = 6

** for bore d2 / d3 = 14

Build & Price

Open 3D configurator
Bore code



Technical values

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Shore hardness
coupling spider
Rated torque
in Nm
Max. torque in NmMax. speed (min-1)
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Moment of inertia in kgm2Static
torsional stiffness
in Nm/rad
Max. shaft misalignment
lateral in mm

axial in mm

angular in °
14BS2.0 x 10-780,150,61
14WS2.0 x 10-7140,10,61
14RS2.0 x 10-7220,10,61
20BS1.1 x 10-6160,20,81
20WS1.1 x 10-6290,150,81
20RS1.1 x 10-6550,10,81
30BS6.2 x 10-6460,211
30WS6.2 x 10-6730,1511
30RS6.2 x 10-61300,111
40BS3.7 x 10-53800,151,21
40WS3.7 x 10-55700,11,21
40RS3.7 x 10-512000,11,21
55BS1.6 x 10-414000,21,41
55WS1.6 x 10-416000,151,41
55RS1.6 x 10-426000,11,41

Temperature correction factors

If the ambient temperature is greater than 30 °C, the rated torque and the maximum torque must be adjusted using the temperature correction factors.

Ambient temperature

Temperature correction factor

-20 °C up to +30 °C


+30 °C up to +40 °C


+40 °C up to +60 °C


Misalignment and runout tolerances

Like all mechanical parts, shafts are subjected to manufacturing and assembly tolerances that generally cannot be entirely eliminated even with extensive technical measures.
If these deviations are not taken into account in the design, the result can be vibrations, running noises, and wear or damage to the shafts and their bearings.
Suitable couplings not only are able to effectively compensate for misalignment and runout errors, they also greatly simplify the assembly process, thereby reducing the overall labor required.
Shaft misalignment and runout errors can vary in nature and should always be taken into consideration when selecting the appropriate coupling.

Error type

Misalignment diagram

The axes of the shafts are in fact parallel, but they are offset laterally and do not line up.

Misalignment diagram{St:_}Lateral

The axes of the shafts do not lie in the same plane; they meet at a certain angle.

Misalignment diagram{St:_}Angular

The shafts move axially along the axis of rotation.

Misalignment diagram{St:_}Axial

The shafts move radially out of the center of the axis of rotation.

Misalignment diagram{St:_}Runout

Shaft insertion depth

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.
If the insertion depth is too low, the shaft could slip out of the coupling, or the clamping hub could break. If the shaft is inserted too far, this can cause interference within the coupling, leading to damage.

Shaft insertion depth

Application example

Application examples GN 2240

Static torsional stiffness and temperature

The diagrams show the change in static torsional stiffness within the permissible operating temperature range, under the assumption that the static torsional stiffness at 20 °C is 100 percent. The torsional stiffness of the couplings decreases with increasing temperature.

Statische Torsionssteife und Temperatur / GN 2240 / BS Statische Torsionssteife und Temperatur / GN 2240 / WS
Statische Torsionssteife und Temperatur / GN 2240 / RS

Restoring force – Eccentricity

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.
If the couplings are installed with the lowest possible eccentricity, the resulting restoring forces are lower. This also reduces the force acting on the shaft bearing.

Rückstellkraft - Exzentrizität / GN 2240 / BS Rückstellkraft - Exzentrizität / GN 2240 / WS
Rückstellkraft - Exzentrizität / GN 2240 / RS

Selected Part (How to order)

Total (net)
plus VAT 6,11 €
gross 38,25 €
In stock
Weight: 0,009 kg
If this article is new in our product range, it may happen that details concerning weight are as yet not listed.
If you do need weight details, please contact our Sales Department!
Phone +49 7723 6507 - 0
RoHS: Yes
This article is RoHS-compliant in application of Annex III., which means it complies with EU Directive 2011/65/EU, including extension (2015/863/EU), for restricting the use of certain hazardous substances in electrical and electronic devices. The Directive regulates the use of hazardous substances in devices and components. The implementation in national law is summarily described with RoHS(Restriction of (the use of certain) hazardous substances).
Please note our order discounts.
With a total value (net) per order:
from 175,00 € -> 10 % discount
from 275,00 € -> 20 % discount
from 375,00 € -> 30 % discount

Surcharge for small volume purchases:
-> 15,00 Euro
for value of goods less than 25,00 €
-> 10,00 Euro
for value of goods from 25,00 to 50,00 €
All prices in accordance with our price list No. 55, valid from 1 September 2022, plus VAT only valid for Germany.

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