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Aluminium motion-control coupling, bright finish, 1.25 in outside diameter

Ruland Manufacturing

Ruland Manufacturing PCR20-8-8-A Coupling 1/2in x 1/2in

SKU CH-NHXC-4Z7MV

Aluminium motion-control coupling joins two 1/2 in shafts with 52 in-lb torque capacity and 6,000 RPM limit

  • Aluminum construction resists corrosion
  • One-piece clamp simplifies shaft installation
  • Rated torque 52 in-lb handles moderate loads
  • Maximum speed 6,000 RPM suits high-speed shafts
  • Operates up to 225 °F in demanding environments

Motion-control coupling for precision shafts

The Ruland Manufacturing PCR20-8-8-A is a single-piece clamp coupling that joins two half-inch shafts in motion-control assemblies. It suits engineers and technicians who need zero-backlash torque transmission between identical bore sizes.

Bright-finished aluminium body

Machined from aluminium with a bright finish, the coupling measures 1.25 inches outside diameter and 38.1 millimetres overall length. Each bore runs 0.67 inches deep and is secured by an M4 cap screw, giving a firm grip without marring the shafts.

Rated torque of 52 in-lb at up to 6 000 RPM

The coupling transmits a maximum of 52 inch-pounds of torque while operating at speeds up to 6 000 revolutions per minute. Continuous temperatures above 225 degrees Fahrenheit are outside the rated range, so high-heat environments need a different solution.

Highlights

  • Aluminum construction resists corrosion
  • One-piece clamp simplifies shaft installation
  • Rated torque 52 in-lb handles moderate loads
  • Maximum speed 6,000 RPM suits high-speed shafts
  • Operates up to 225 °F in demanding environments

Specifications

BrandRULAND MANUFACTURING

Questions about this item

What torque does the PCR20 coupling transmit at its 6,000 RPM limit?

The coupling is rated for 52 in-lb of torque while operating up to 6,000 RPM.

What shaft diameter and screw size does the PCR20-8-8-A require for mounting?

Each bore accepts a 1/2 in shaft and is secured with an M4 cap screw.

How do you install the single-piece clamp coupling without distorting the bore?

Slide the coupling onto both shafts, align the 38.1 mm overall length, then tighten the M4 cap screw evenly to 52 in-lb rated torque.

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