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Aluminium beam coupling, four beams, clamp hubs, 1/4 inch bores

Ruland Manufacturing

Ruland Manufacturing PCR12-4-4-A Coupling 4 Beam Clamp 1/4 x 1/4 In

SKU CH-P2X9-HDFTM

Four-beam aluminum clamp coupling joins 1/4-inch round shafts, handling 14 in-lb torque at 6,000 RPM with 3-degree angular and 0.008-inch parallel misalignment capacity

  • Zero-backlash motion control from four-beam design
  • 3° angular misalignment capacity handles shaft offsets
  • 14 in-lb torque rating at 6,000 RPM max speed
  • 03 in-lb/deg torsional stiffness ensures precise response
  • Clamp-on locking secures 1/4 in shafts without keyways

Precision Motion Coupling

The Ruland PCR12-4-4-A is a four-beam flexible coupling machined from aluminium for motion-control systems. It connects two round shafts of identical 1/4 inch diameter using integral clamp collars. Rated to 6,000 RPM and 14 in-lb torque, it handles angular offsets up to 3 degrees and parallel misalignment of 0.008 inch.

Build Integration

Clamp-on locking removes the need for keyways, set screws or shaft machining, preserving shaft integrity and cutting assembly time. The 29/32 inch overall length and 3/4 inch outside diameter fit tight envelopes while the 0.4 inch through-bore depth ensures full grip. Axial compliance of 0.005 inch absorbs thermal growth without loading bearings.

Target Users

Suited for engineers specifying servo or stepper drives where low inertia and zero backlash are required. Not a fit for buyers who need higher torque capacity, larger bore combinations or corrosion-resistant stainless construction.

Specifications Reference

Torsional stiffness is 3.03 in-lb per degree, enabling predictable positioning in closed-loop systems. The coupling meets California Proposition 65 labelling requirements for listed chemicals. All dimensions use the inch measurement system.

How it compares

Measured against everything we stock in Bearings, Belts & Drive Components, at today’s prices. Recalculated every night.

Price $38.99
Typical for this category: the median of 693 items is $35.99.

Specifications

No published specifications for this item yet.

Questions about this item

How much torque can the PCR12-4-4-A coupling transmit before it reaches its 14 in-lb limit?

The coupling is rated for a maximum torque of 14 in-lb; exceeding this value can cause permanent deformation or failure of the aluminum beams.

Does the aluminum body stay cool and quiet when running continuously at 6,000 RPM?

At 6,000 RPM the aluminum coupling generates minimal heat and runs silently, as there are no contacting friction surfaces to produce noise or significant temperature rise.

Will this clamp-style coupling fit directly onto my 1/4 inch round shafts without extra parts?

Yes, both bores are 1/4 inch round and use an integral clamp screw, so the coupling mounts directly on matching shafts with no keys, adapters or bushings required.

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