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Aluminium six-beam clamp coupling, 1 in OD, 1-1/2 in long

Ruland Manufacturing

Ruland Manufacturing FCR16-6-6-A Coupling 6 Beam Clamp 3/8 x 3/8 In

SKU CH-5ATG-YH4JP

Six-beam aluminum clamp coupling handles 33 in-lb torque at 6,000 RPM with 3° angular misalignment

  • Handles angular misalignment up to 3 degrees
  • Clamp-on locking secures shafts without keyways
  • Six-beam aluminum design balances torque and flexibility
  • Operates at speeds up to 6,000 RPM
  • Torsional stiffness of 10.75 in-lb/Deg for precise motion control

Aluminium 6-Beam Coupling

This aluminium coupling uses six flexible beams to join two 3/8 inch round shafts with clamp-on hubs. It transmits motion while absorbing angular offset up to three degrees and parallel offset of 0.015 inch. The clamp design avoids keyways or set screws, making it suitable for prototype rigs and low-torque automation axes.

Upgrade from Jaw or Oldham Types

The beam construction replaces jaw or Oldham couplings when backlash-free motion and constant velocity are required. The jump is worth it for positioning stages, encoder loops or stepper-driven slides where any lost motion degrades accuracy. It is not for buyers who need higher torque capacity or larger shaft diameters.

Clamp-On Limits at 6,000 RPM

At 6,000 RPM the clamp-on hubs rely on friction grip, so shaft surface finish and tightening torque become critical. Axial motion is limited to 0.01 inch and torsional stiffness is 10.75 in-lb per degree, restricting use to light-duty drives. The aluminium body also limits temperature range compared with steel alternatives.

Highlights

  • Handles angular misalignment up to 3 degrees
  • Clamp-on locking secures shafts without keyways
  • Six-beam aluminum design balances torque and flexibility
  • Operates at speeds up to 6,000 RPM
  • Torsional stiffness of 10.75 in-lb/Deg for precise motion control

Specifications

No published specifications for this item yet.

Questions about this item

What shaft diameters fit the 3/8 in bore on this clamp coupling?

The bore diameter is 3/8 in on both sides, so it accepts two 3/8 in round shafts.

How do I install the clamp hubs and what is the common mistake?

Loosen the clamp screws, slide the coupling onto both shafts, then torque each screw evenly; the error is tightening one side fully before the other.

When should I replace the six-beam aluminum element?

Replace it if angular misalignment exceeds 3 degrees, parallel offset exceeds 0.015 in, axial play exceeds 0.01 in, or torque regularly exceeds 33 in-lb.

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