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Aluminium four-beam clamp coupling, 3/8 by 5/16 inch bores

Ruland Manufacturing

Ruland Manufacturing PCR16-6-5-A 4-Beam Coupling 3/8 x 5/16 in

SKU CH-6RKG-1F85N

Four-beam clamp coupling joins 3/8 in and 5/16 in shafts with 3° angular and 0.015 in parallel misalignment capacity

  • Handles 3° angular misalignment for flexible shaft alignment
  • Clamp-on locking secures shafts without keyways
  • Four-beam design delivers 5 in-lb/deg torsional stiffness
  • Aluminium construction keeps inertia low at 6,000 RPM max
  • 015 in parallel and 0.01 in axial compensation absorbs installation errors

Ruland 4-Beam Clamp Coupling 3/8 x 5/16

This Ruland PCR16-6-5-A coupling connects shafts with different bore sizes using a four-beam aluminium design. The clamp-style locking secures round shafts without marring them. Rated for 6000 RPM and 30 in-lb maximum torque, it suits precision motion-control applications where low inertia and zero backlash are required.

Suited for precision drives

Engineers building servo or stepper drivelines that need 3-degree angular compensation and 0.015 in parallel offset will find this coupling matches the spec. It is not for high-torque loads exceeding the 30 in-lb rating, nor for environments where aluminium is chemically incompatible. Buyers needing larger bore combinations or higher torsional stiffness should look at other models.

Key spec: 30 in-lb torque limit

The 30 in-lb maximum torque figure is the single value that determines whether this coupling can handle the load. Exceed it and the beams will yield, so verify the application peak torque against this number before specifying the part.

Highlights

  • Handles 3° angular misalignment for flexible shaft alignment
  • Clamp-on locking secures shafts without keyways
  • Four-beam design delivers 5 in-lb/deg torsional stiffness
  • Aluminium construction keeps inertia low at 6,000 RPM max
  • 015 in parallel and 0.01 in axial compensation absorbs installation errors

Specifications

No published specifications for this item yet.

Questions about this item

How often will the aluminum PCR16-6-5-A coupling need replacement under normal operation?

The aluminum construction resists corrosion and requires no scheduled replacement; inspect only if vibration or misalignment exceeds the 3-degree angular or 0.015-in parallel limits.

What is the first limit reached when running the coupling continuously at high speed?

The 6,000 RPM maximum speed rating is the primary ceiling; sustained operation above this risks exceeding the 30 in-lb torque capacity and 5 in-lb/deg torsional stiffness.

How much heat and noise does the clamp-on coupling generate during all-day use?

With only 0.01 in axial motion allowance and aluminum's thermal conductivity, heat buildup is minimal; the 4-beam design runs quietly within the rated 6,000 RPM and 30 in-lb torque envelope.

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