Beam Couplings GN 2246

GN 2246 Aluminum Beam Couplings, with Clamping Hub, with Metric-Inch Bores

Standard Sheet GN 2246 Print This Page Highlights - Couplings ISO Fundamental Tolerances

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.

Specification

AluminumAL
- Anodized finish, natural color
- Temperature resistant up to 302 °F (150 °C)
- Socket cap screws DIN 912
  Steel, blackened finish

RoHS

On request

Bore with keyway

GN 2246 Aluminum Beam Couplings, with Clamping Hub, with Metric-Inch Bores sketch

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Part Options / Table

Bore code

B	Without keyway

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Metric

Dimensions in: Inch (change to Metric)

d₁	d₂ - d₃ +0.001 Bore Recommended shaft tolerance -0.001

0.79	5-1/4	6-1/4	8-1/4	-	-
0.98	6-1/4	8-1/4	8-3/8	10-1/4	10-3/8
1.26	10-3/8	12-3/8	-	-	-

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Dimensions in: Inch (change to Metric)

d₁	d₄	l₁	l₂ Recommended shaft insertion depth	l₃	l₄	Tightening torque of the screw in Nm ≈

0.79	M 2.5	1.02	0.30	0.15	0.26	1
0.98	M 3	1.22	0.33	0.17	0.35	1.5
1.26	M 4	1.61	0.47	0.24	0.43	2.5

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Technical Values

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d₁	Rated torque in Nm	Max. speed (min^-1)	Moment of inertia in kgm²	Static torsional stiffness in Nm/rad

12	0.4	52000	7.8 x 10^{^-8}	45
16	0.5	39000	3.4 x 10^{^-7}	80
20	1	31000	9.1 x 10^{^-7}	170
25	2	25000	2.6 x 10^{^-6}	380
32	4	19000	9.7 x 10^{^-6}	500

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d₁	Max. shaft misalignment Lateral in mm	Axial in mm	Angular in °

12	0.1	± 0.3	2
16	0.1	± 0.4	2
20	0.1	± 0.4	2
25	0.2	± 0.5	2
32	0.2	± 0.5	2

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
Lateral The axes of the shafts are in fact parallel, but they are offset laterally and do not line up.						$Misalignment diagram{St:_}Lateral$
Angular The axes of the shafts do not lie in the same plane; they meet at a certain angle.						$Misalignment diagram{St:_}Angular$
Axial The shafts move axially along the axis of rotation.						$Misalignment diagram{St:_}Axial$
Runout 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.

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 | 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.

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Total (net)

US$65.63

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Quantity

Please note our quantity discounts (US Dollars).

Min	Max	Price
1	4	US$65.63
5	9	US$60.16
10	24	US$54.70
≥ 25		US$49.23

Prop 65: Not compliant

WARNING:
Cancer and Reproductive Harm - www.P65Warnings.ca.gov

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: 0.016 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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GN 2246 Beam Couplings Aluminum, with Clamping Hub, with Metric-Inch Bores