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Stainless steel rigid shaft coupling, plain finish, set screw type

Climax Metal Products

Climax Metal Products RC-112-S Rigid Shaft Coupling 2.125in

SKU CH-14DD-ZSS6Q

Connects two 1 1/8 inch shafts with a stainless steel set-screw coupling measuring 2.125 inches outside diameter

  • Stainless steel resists corrosion in harsh environments
  • Set-screw design locks shafts without a keyway
  • 125 in outside diameter fits standard conduit
  • 3 in overall length keeps assemblies compact
  • 3/8-16 screw size secures connection firmly

Rigid shaft coupling for 1 1/8 inch bore

The Climax Metal Products RC-112-S is a single-piece rigid shaft coupling machined from stainless steel with a plain finish. It connects two shafts that share a 1 1/8 inch bore diameter using a set-screw locking method. The coupling suits applications where precise alignment can be maintained and zero backlash is required.

Stainless steel construction handles heat

The stainless steel body resists corrosion and conducts heat away from the joint during continuous operation. A 3/8 inch-16 set screw secures each shaft without a keyway, keeping the assembly compact at 3 inches overall length and 2 1/8 inches outside diameter. No moving parts means silent running and no wear-related power loss.

Plain finish and clearance diameter simplify

The 2.125 inch clearance diameter provides room for the set screws while the plain finish avoids coating buildup that could affect fit. Supplied as a single coupling without additional hardware or software, it is ready for direct integration into existing drivetrain assemblies. Buyers needing a keyed connection or flexible misalignment compensation should select a different coupling style.

How it compares

Measured against everything we stock in Electrical Conduit & Fittings, at today’s prices. Recalculated every night.

Price $63.99
Pricier than about 74% of the 1,290 comparable items (median $28.99).

Specifications

Product
Brand nameCLIMAX METAL PRODUCTS

Questions about this item

How do I install the RC-112-S coupling and what is the common mistake with the set screws?

Slide the coupling onto both shafts, align them, then tighten the two 3/8-16 set screws evenly. The step people get wrong is tightening one screw fully before the other, which can cock the coupling and damage the shaft.

What maintenance or replacement will the RC-112-S coupling need over time?

Periodically check the 3/8-16 set screws for loosening caused by vibration. Retighten them if needed. The stainless steel body resists corrosion, so replacement is only necessary if the bore wears or the screws strip.

What limit appears first on the RC-112-S coupling during sustained high-torque use?

The holding power of the two 3/8-16 set screws against the plain shaft is the first limit. Under sustained torque the screws can slip or fret the shaft surface before the stainless steel body yields.

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