GN 2243 Oldham Couplings Aluminum, Hub with Set Screw, with Metric-Inch Bores


GN 2243 Aluminum Oldham Couplings, Hub with Set Screw, with Metric-Inch Bores Bore code: B - Without keyway
Bore code: B - Without keyway
GN 2243 Aluminum Oldham Couplings, Hub with Set Screw, with Metric-Inch Bores Bore code: B - Without keyway GN 2243 Aluminum Oldham Couplings, Hub with Set Screw, with Metric-Inch Bores Bore code: K - With keyway (from d<sub>1</sub> = 20)

Product description


Oldham couplings GN 2243 can compensate for large lateral shaft misalignments while transmitting high torques. As a result, they are used in applications with a focus on pure torque and power transmission associated with high lateral shaft misalignments.

The use of set screws for clamping and the simple plug-in installation make oldham couplings very easy to assemble. They are suitable for a diverse range of applications and are used in general machine construction in packaging machines and pumps.

With the bore code K, the keyway is always integrated into both bores d2 and d3.


Anodized finish, natural color

Plastic (Polyacetal POM)KU
Temperature resistant up to 176 °F (80 °C)

Set screws
Steel, blackened finish

  • For d2 / d3 ≤ 4, one set screw
  • For d2 / d3 > 4, two set screws

Temperature range from:
-4 °F up to +176 °F (-20 °C up to +80 °C)


Technical drawing

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GN 2243 Aluminum Oldham Couplings, Hub with Set Screw, with Metric-Inch Bores sketch

Part Options / Table

Bore code

BWithout keyway
KWith keyway (from d1 = 20)
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Dimensions in: Inch (change to Metric)
d1d2 - d3 +0.001
Recommended shaft tolerance -0.001
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Dimensions in: Inch (change to Metric)
shaft insertion depth
l3Tightening torque
of the screw
in Nm ≈
0.79M 40.480.840.230.111.7
1.18M 40.641.280.390.201.7
1.50M 50.801.570.480.244
Only available with bore code B

Build & Price

3D Product Configurator
Outside diameter d1
Bore code

Bore d2
Bore d3
Material (Hub)

Material (Spacer)

Technical Values

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d1Rated torque
in Nm*
Max. torque in Nm*Max. speed
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d1Moment of inertia in kgm2Static
torsional stiffness
in Nm/rad
Max. shaft misalignment
Lateral in mm

Angular in °
87.4 x 10-9120.73
125.3 x 10-86013
151.4 x 10-78013
205.7 x 10-71201.23
305.4 x 10-653023
381.6 x 10-515002.53

*Load fluctuations are not taken into account

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

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 68°F (20 °C) is 100 percent. The torsional stiffness of the couplings decreases with increasing temperature.

Statische Torsionssteife und Temperatur{St:_}GN 2242

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

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{St:_}GN 2242

Selected Part

Total US Dollars (net)
In Stock: 8
In Stock
Please note our quantity discounts (US Dollars).
≥ 25$18.40
Prop 65: Not compliant
Cancer and Reproductive Harm -
RoHS: Compliant
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)).
Weight: 0.024 lbs
If weight is not listed, please contact our Sales Department for additional information regarding weight.
Phone: 800-877-8351
All Prices are in US Dollars. Taxes Not Included.

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Our service team is available from Monday to Friday between 7:30 AM and 5:00 PM Central Time: 800-877-8351

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GN 2243-20-B6-1/4-AL-KUGN 2243-20-B6-5/16-AL-KUGN 2243-20-K6-5/16-AL-KUGN 2243-20-B6-3/8-AL-KUGN 2243-20-K6-3/8-AL-KUGN 2243-20-B8-1/4-AL-KUGN 2243-20-B8-5/16-AL-KUGN 2243-20-K8-5/16-AL-KUGN 2243-20-B8-3/8-AL-KUGN 2243-20-K8-3/8-AL-KUGN 2243-20-B10-1/4-AL-KUGN 2243-20-B10-5/16-AL-KUGN 2243-20-K10-5/16-AL-KUGN 2243-20-B10-3/8-AL-KUGN 2243-20-K10-3/8-AL-KUGN 2243-30-B8-3/8-AL-KUGN 2243-30-K8-3/8-AL-KUGN 2243-30-B8-1/2-AL-KUGN 2243-30-K8-1/2-AL-KUGN 2243-30-B10-3/8-AL-KUGN 2243-30-K10-3/8-AL-KUGN 2243-30-B10-1/2-AL-KUGN 2243-30-K10-1/2-AL-KUGN 2243-30-B12-3/8-AL-KUGN 2243-30-K12-3/8-AL-KUGN 2243-30-B12-1/2-AL-KUGN 2243-30-K12-1/2-AL-KUGN 2243-38-B12-1/2-AL-KUGN 2243-38-K12-1/2-AL-KUGN 2243-38-B12-5/8-AL-KUGN 2243-38-K12-5/8-AL-KUGN 2243-38-B12-3/4-AL-KUGN 2243-38-K12-3/4-AL-KUGN 2243-38-B15-1/2-AL-KUGN 2243-38-K15-1/2-AL-KUGN 2243-38-B15-5/8-AL-KUGN 2243-38-K15-5/8-AL-KUGN 2243-38-B15-3/4-AL-KUGN 2243-38-K15-3/4-AL-KUGN 2243-38-B20-1/2-AL-KUGN 2243-38-K20-1/2-AL-KUGN 2243-38-B20-5/8-AL-KUGN 2243-38-K20-5/8-AL-KUGN 2243-38-B20-3/4-AL-KUGN 2243-38-K20-3/4-AL-KU

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