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Aluminium motion-control coupling, 19 mm diameter, two 6 mm set-screw bores

Ruland Manufacturing

Ruland Manufacturing Motion Control Coupling Set Screw 6mm x 6mm

SKU CH-1G8H-2SMBF

Connects two 6 mm shafts with an aluminum four-beam coupling rated to 1.58 N-m torque and 6 000 RPM

  • Precise alignment with 3-degree angular misalignment tolerance
  • High-speed operation up to 6,000 RPM maximum speed
  • Lightweight aluminum construction with 19.1 mm outside diameter
  • Secure shaft locking via set screw on 6 mm bores
  • Smooth motion control with 0.34 N-m/deg torsional stiffness

Precision Motion Coupling

The Ruland Manufacturing PSMR19-6-6-A is a metric aluminium coupling with dual 6 mm round bores secured by set screws. It transmits up to 1.58 N-m of torque at speeds to 6,000 RPM while accommodating 3 degrees of angular and 0.2 mm of parallel misalignment. The four-beam design provides 0.34 N-m/Deg torsional stiffness in a 22.9 mm overall length.

Upgrade From Basic Collars

This coupling replaces simple rigid sleeves or single-beam units when shafts cannot be held perfectly coaxial. The added beams allow measurable angular and parallel error without binding, and the 0.13 mm axial compliance absorbs thermal growth. The jump is worthwhile whenever misalignment exceeds what a solid sleeve can tolerate without bearing side-loads.

Build Integration

The 19.1 mm outside diameter and 10.7 mm length through each bore fit compact servo or stepper mounts without protruding into adjacent components. Metric bores match standard 6 mm motor and leadscrew shafts directly, eliminating adapter sleeves. Set-screw locking requires only a hex key for installation and allows quick repositioning during alignment.

Highlights

  • Precise alignment with 3-degree angular misalignment tolerance
  • High-speed operation up to 6,000 RPM maximum speed
  • Lightweight aluminum construction with 19.1 mm outside diameter
  • Secure shaft locking via set screw on 6 mm bores
  • Smooth motion control with 0.34 N-m/deg torsional stiffness

Specifications

No published specifications for this item yet.

Questions about this item

Will the 19.1 mm outside diameter clear my motor housing?

The coupling measures 19.1 mm across its body, so verify that your housing bore or clearance pocket is larger than that before ordering.

Which hex key tightens the set screws without stripping them?

Metric set screws on this bore size typically use a 2 mm hex key; apply even torque to both screws and avoid over-tightening the aluminum hub.

How often should I inspect the four-beam flexure for fatigue?

Check the beams for cracks or permanent deformation every few thousand hours at speeds up to 6 000 RPM, and replace the coupling if axial play exceeds 0.13 mm.

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