$93.27 ea
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1 $93.27 ea
10 $69.95 ea
25 $52.23 ea
50 $31.36 ea
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Ruland MWC25-10-7-A, 10mm x 7mm Four Beam Coupling, Aluminum, Clamp Style, 25.0mm OD, 30.0mm Length


Ruland MWC25-10-7-A is a four beam coupling with 10mm x 7mm bores, 25.0mm OD, and 30.0mm length. It is machined from a single piece of material and feature two sets of two spiral cuts. This gives it higher torque capacity, lower windup, and larger body sizes than single beam couplings. MWC25-10-7-A is well suited for applications such as encoders that require high positioning accuracy. MW-series couplings have purely metric outer diameter and length dimensions and fit in a smaller envelope than the P-series allowing for easier interchanges from single beam couplings. This four beam spiral coupling is zero-backlash and has a balanced design for reduced vibration at high speeds of up to 6,000 RPM. All hardware is metric and tests beyond DIN 912 12.9 standards for maximum torque capabilities. MWC25-10-7-A is made from 7075 aluminum for lightweight and low inertia. It is machined from bar stock that is sourced exclusively from North American mills and RoHS2 and REACH compliant. MWC25-10-7-A is manufactured in our Marlborough, MA factory under strict controls using proprietary processes.



Large Bore B1

10 mm

Small Bore B2

7 mm

B1 Shaft Penetration

14.2 mm

B2 Shaft Penetration

14.2 mm

Outer Diameter OD

25.0 mm

Bore Tolerance

+.025 mm / -.000 mm

Length L

30.0 mm

Fastening Hardware

Cap Screw


Screw Material

Alloy Steel

Hex Wrench Size

2.5 mm

Screw Finish

Black Oxide

Seating Torque

2.1 Nm

Number of Screws

2 ea

Performance Specifications

Static Torque

3.10 Nm

Angular Misalignment

Dynamic Torque Non-Reversing

1.55 Nm

Parallel Misalignment

0.38 mm

Dynamic Torque Reversing

0.78 Nm

Axial Motion

0.25 mm

Torsional Stiffness

1.75 Deg/Nm

Moment of Inertia

2.955 x10-6 kg-m2

Maximum Speed

6,000 RPM

Additional Information

Material Specification

7075-T651 Extruded and Drawn Aluminum Bar


-40°F to 225°F
-40°C to 107°C

Finish Specification



Ruland Manufacturing

Country of Origin


Weight (lbs.)


Product Notes

Note 1

Torque ratings are at maximum misalignment.

Note 2

Performance ratings are for guidance only. The user must determine suitability for a particular application.

Note 3

Torque ratings for the couplings are based on the physical limitations/failure point of the machined beams. Under normal/typical conditions the hubs are capable of holding up to the rated torque of the machined beams. In some cases, especially when the smallest standard bores are used or where shafts are undersized, slippage on the shaft is possible below the rated torque of the machined beams. Please consult technical support for more assistance.

Prop 65

WARNING This product can expose you to the chemical Ethylene Thiourea, known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to

ISO 9001:2015


Conflict Minerals






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