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Bright aluminium beam coupling, 0.984 in diameter, 1.181 in long

Ruland Manufacturing

Ruland Manufacturing MWC25 8mm x 1/4in Coupling

SKU CH-YQEF-7EN0T

Aluminium motion-control coupling joins an 8 mm shaft to a 1/4 in shaft, rated for 30 in-lb torque at 6,000 RPM

  • Aluminium construction keeps weight low
  • 30 in-lb torque rating transmits power reliably
  • 6 000 RPM maximum speed suits fast shafts
  • 225 °F temperature limit handles demanding environments
  • Bright finish resists corrosion in service

Motion Control Coupling

This motion control coupling connects a 1/4 inch shaft to an 8 mm shaft in precision assemblies. It is intended for engineers and technicians building motion systems that require zero-backlash torque transmission between mismatched bore sizes. The single-piece clamp design simplifies installation on both shafts.

Rated Torque 30 in-lb

The coupling transmits up to 30 in-lb of torque at speeds up to 6,000 RPM. Aluminum construction keeps inertia low for responsive starts and stops. Operation above the rated torque or speed will exceed the design limits and can cause premature wear or slip.

1/4 in x 8 mm Bore

The defining specification is the dual bore diameter of 1/4 inch by 8 mm. Select this part only when the driving and driven shafts match these exact dimensions. It will not fit any other shaft size without modification.

How it compares

Measured against everything we stock in Electrical Conduit & Fittings, at today’s prices. Recalculated every night.

Price $38.99
Pricier than about 58% of the 1,290 comparable items (median $28.99).

Specifications

Product
Brand nameRULAND MANUFACTURING

Questions about this item

Will the MWC25 coupling fit my existing 8 mm motor shaft and 1/4 inch lead screw?

Yes, the coupling is bored for 8 mm on one side and 1/4 in on the other, matching those two shaft sizes directly.

How can I verify the MWC25 is installed correctly and running within its 30 in-lb torque rating?

Tighten the M3 cap screws to the recommended torque, then confirm smooth rotation up to 6 000 RPM without binding or unusual noise.

Does the MWC25 come with the M3 cap screws, or must I purchase them separately?

The coupling is supplied as a single piece with the M3 cap screws already fitted; no additional fasteners are required.

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