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Small stainless steel cylinder with set screws, one inch long

Climax Metal Products

Climax Metal Products RC-031-S Rigid Shaft Coupling collectible

SKU CH-44WP-G3JT7

A stainless-steel rigid shaft coupling for 5/16 in bores, rated to 3,500 RPM and 71 in-lb torque

  • TypeBearings, V-belts & Power Transmission Equipment
  • ColorTransparent
  • Stainless-steel construction resists corrosion for long service life
  • One-piece design eliminates backlash and simplifies installation
  • Rated to 3,500 RPM for high-speed shaft connections
  • Transmits up to 71 in-lb of torque reliably
  • Fits 5/16 in round bores with .63 in clearance

Industrial Rigid Coupling

This new Climax Metal Products RC-031-S rigid shaft coupling joins two 5/16-inch round bores in a one-piece stainless-steel body. It transmits torque up to 71 in-lb at speeds up to 3,500 RPM. The 1-inch overall length and 0.63-inch clearance diameter keep the assembly compact for light-duty power-transmission tasks.

Build Integration

The coupling requires no keyways and uses set-screw locking, so installation only needs a hex driver and aligned shafts. Its one-piece construction eliminates the need for separate hubs or spacers, freeing axial space on the driveline. Identical bore diameters mean both shafts share the same 5/16-inch tolerance without adapters.

Target Users

Suitable for maintenance engineers and OEM assemblers who need a stainless, set-screw rigid coupling for 5/16-inch shafts running below 3,500 RPM. Not for buyers who need larger bore sizes, keyed connections, higher torque capacity, or flexible misalignment compensation.

Highlights

  • Stainless-steel construction resists corrosion for long service life
  • One-piece design eliminates backlash and simplifies installation
  • Rated to 3,500 RPM for high-speed shaft connections
  • Transmits up to 71 in-lb of torque reliably
  • Fits 5/16 in round bores with .63 in clearance

Specifications

BrandCLIMAX METAL PRODUCTS
TypeBearings, V-belts & Power Transmission Equipment
ColorTransparent

Questions about this item

What maximum torque can the RC-031-S handle before it slips?

The coupling is rated for 71 in-lb of torque, so sustained loads above that will cause slipping.

How hot or noisy does the stainless steel coupling get at 3,500 RPM?

At the rated 3,500 RPM the one-piece stainless steel body runs cool and silent; no bearings or lubrication are needed.

What shaft size must I already have for the 5/16 in bore to fit?

Both shafts must measure exactly 5/16 in diameter, as the coupling has no keyway and accepts only that size.

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