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GN 2246 Beam Couplings with Clamping Hub


GN 2246 Beam Couplings with Clamping Hub

Product description


Beam couplings GN 2246 transmit angle positions and torques with extreme precision and no backlash. They are manufactured of a single piece and offer high torsional stiffness thanks to the alternating slits. The clamping hubs make beam couplings very easy to assemble.

They are used in applications where precise position and movement transmission is required, such as in the drive systems of position measuring systems and in test benches.



  • Snodized, natural color
  • Temperature resistant up to 150 °C
  • Socket cap screws DIN 912
    Steel, blackened


On request

Bore with keyway

Technical drawing

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GN 2246 Beam Couplings with Clamping Hub sketch

Article options / Table

Bore code

BWithout keyway
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d1d2 - d3 H8
shaft tolerance h7
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shaft insertion depth
l3l4Tightening torque
of the screw
in Nm ≈
12M 218,552,540.5
16M 2,5236,53,2551
20M 2,5267,53,756,51
25M 3318,54,2591.5
32M 441126112.5

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Bore code


Technical values

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d1Rated torque
in Nm
Max. speed (min-1)Moment of inertia in kgm2Static
torsional stiffness
in Nm/rad
120.4520007.8 x 10-845
160.5390003.4 x 10-780
201310009.1 x 10-7170
252250002.6 x 10-6380
324190009.7 x 10-6500
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d1Max. shaft misalignment
lateral in mm

axial in mm

angular in °
120.1± 0.32
160.1± 0.42
200.1± 0.42
250.15± 0.52
320.15± 0.52

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

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 2246 AL

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 2246 AL

Restoring force – Pressure

If the coupling is under pressure, subject to compressive load in the axial direction, it will strive to return to its neutral position. The force that counteracts the compressive force is referred to as restoring force.
Lowering the compression acting on a coupling results in a lower restoring force and less force exerted axially. This must always be taken into account in dimensioning the coupling.

Rückstellkraft - Druck | GN 2246 AL

Selected Part (How to order)

Total (net)
plus VAT 6,39 €
gross 40,04 €
In stock
Weight: 0,004 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 49,99 €
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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