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Black oxide steel rigid coupling with keyway

Climax Metal Products

Climax Metal Products 2CC-125-125-KW Rigid Steel Conduit Coupling

SKU CH-ES2S-FD18S

A two-piece clamp coupling joins 1¼-inch shafts with a ¼-inch keyway, rated to 3,080 in-lb torque and 4,000 RPM

  • Rigid steel construction withstands high torque loads
  • Two-piece clamp design enables quick shaft installation
  • Keyway included prevents rotational slippage under load
  • Black oxide finish resists corrosion in harsh environments
  • Rated for 4,000 RPM continuous operation

Rigid steel shaft coupling

The Climax Metal Products 2CC-125-125-KW is a two-piece clamp coupling machined from steel with a black oxide finish. It connects shafts with a 1 1/4 inch bore diameter and includes a keyway for positive torque transmission. The component suits industrial power-transmission assemblies requiring a rigid, zero-backlash joint.

Thermal and power characteristics

As a passive mechanical component the coupling generates no heat and draws no electrical power during operation. It produces no audible noise beyond the sound of the connected drivetrain. The steel body dissipates frictional warmth from the shaft interface without active cooling.

Keyway and hardware supplied

A 1/4 inch keyway is machined into each bore to accept a standard key that prevents rotational slip. The clamp uses 1/4-28 screws to secure the halves around the shafts. No additional accessories, lubricants or software are included with the coupling.

How it compares

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

Price $93.99
Pricier than about 84% of the 1,290 comparable items (median $28.99).

Specifications

Product
Brand nameCLIMAX METAL PRODUCTS

Questions about this item

How do I install the 1/4-28 clamp screws on the 1 1/4 in bore coupling without damaging the shaft?

Slide the two-piece clamp over both shaft ends, align the 1/4 in keyway with the shaft key, then torque the 1/4-28 screws evenly in a cross pattern to avoid distorting the 1 7/8 in outside diameter.

What wear items should I plan to replace on this steel rigid coupling over time?

The black-oxide finish protects the steel body, so only the 1/4-28 clamp screws and the 1/4 in key may need replacement if threads strip or the key shears under overload.

At what point does the 3,080 in-lb torque limit or 4,000 RPM speed limit become the bottleneck during continuous operation?

The 3,080 in-lb torque ceiling is reached first in high-torque, low-speed drives, while the 4,000 RPM ceiling governs in high-speed, low-torque applications.

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