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Aluminium double-disc clamp coupling with two 10 mm round bores

Ruland Manufacturing

Ruland Manufacturing MDCD25-10-10-A Coupling Double Disc Clamp 10 mm Bore

SKU CH-7R42-HNS5M

A double-disc clamp coupling connects two 10 mm shafts, handles 2 degrees of angular misalignment and 0.3 mm axial motion, and transmits up to 2.8 N·m non-reversing torque

  • TypeCouplings, Collars & Adapters
  • Handles 2° angular misalignment for flexible shaft alignment
  • Transmits 2.8 N-m non-reversing torque for reliable power transfer
  • Twin-disc design with 16.6 mm bore engagement ensures secure grip
  • Compact 25.4 mm outer diameter fits tight machine spaces
  • Aluminium hubs and spacer reduce rotating mass for responsive motion

Ruland Double Disc Coupling 10 mm Bore

The Ruland MDCD25-10-10-A is a motion-control coupling with two aluminium discs and a centre spacer. It connects two 10 mm round shafts and transmits up to 2.8 N-m of non-reversing torque or 1.4 N-m of reversing torque. The aluminium hubs measure 11.8 mm long and the overall length through each bore is 16.6 mm.

Suitable for Precision Shaft Alignment

This coupling handles angular misalignment up to 2 degrees and axial motion of .3 mm, making it a fit for servo and stepper drives that need low backlash. It is not designed for high-torque industrial gearboxes or applications that exceed the 2.8 N-m non-reversing limit. Buyers needing larger bore sizes or higher torque ratings should select a different model.

Straightforward Clamp Installation

Each hub uses a clamp-style fastener that tightens onto the shaft without keys or set screws, so alignment is set by sliding the coupling into position and torquing the screws. The most common issue is over-tightening the clamp bolts, which can distort the aluminium hubs and reduce misalignment capacity. Ensure both shafts are clean and within the 10 mm tolerance before assembly.

Highlights

  • Handles 2° angular misalignment for flexible shaft alignment
  • Transmits 2.8 N-m non-reversing torque for reliable power transfer
  • Twin-disc design with 16.6 mm bore engagement ensures secure grip
  • Compact 25.4 mm outer diameter fits tight machine spaces
  • Aluminium hubs and spacer reduce rotating mass for responsive motion

Specifications

TypeCouplings, Collars & Adapters

Questions about this item

What shaft diameters must I already have for the 10 mm bores to fit?

Both shafts must be exactly 10 mm round to match the 10 mm bore diameter 1 and bore diameter 2.

Will the 2-degree angular misalignment and 0.3 mm axial motion tolerate the run-out on my existing motor and leadscrew?

The coupling allows up to 2 degrees of angular misalignment and 0.3 mm axial motion, so it will accommodate typical run-out within those limits.

How do I verify the clamp hubs are holding the rated 2.8 N-m non-reversing torque after installation?

Tighten each clamp screw to the manufacturer’s specified torque, then confirm no slippage occurs when the driven load reaches 2.8 N-m in a single direction.

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