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Stainless steel rigid shaft coupling with set screw

Ruland Manufacturing

Ruland Manufacturing SCX-6-6-SS Conduit

SKU CH-WQEB-CQT4E

Rigid shaft coupling joins two 3/8 in shafts with a set-screw design in 303 stainless steel

  • Product typeBearings
  • 303 stainless steel resists corrosion in harsh environments
  • Set screw design provides secure shaft attachment without keyway
  • Bright finish adds surface protection and clean appearance
  • Rigid coupling maintains precise alignment at up to 4000 RPM
  • Single-piece construction simplifies installation and reduces failure points

Rigid Shaft Coupling

This 303 stainless steel rigid shaft coupling joins two shafts with a set screw connection. It suits maintenance engineers and machine builders who need a solid, non-flexible link between rotating components. The bright finish resists corrosion in typical workshop environments.

Build Quality and Mounting

The coupling is machined from 303 stainless steel with a bright finish for corrosion resistance. A single set screw of 1/4 in.-20 size secures each shaft without a keyway, allowing quick installation and removal on inch-dimensioned shafts. The design transmits torque directly with no flexible element.

3/8 in Bore Diameter

The bore accepts shafts of 3/8 in diameter, which is the critical dimension for compatibility. The coupling operates up to 4,000 RPM and has an outside diameter of 7/8 in with an overall length of 1 3/8 in. Buyers needing a different bore size or a keyed connection must select another model.

How it compares

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

Price $37.99
Pricier than about 57% of the 1,290 comparable items (median $28.99).

Specifications

Product
Brand nameRULAND MANUFACTURING
Product typeBearings

Questions about this item

What interface standard does the 3/8 in bore and 1/4-20 set screw use, and what RPM does it cap at?

The coupling uses an inch-series 3/8 in bore with a 1/4-20 set screw and is rated for a maximum of 4,000 RPM.

What physical dimensions and material must match for this coupling to fit and mount correctly?

It requires a 3/8 in shaft, 7/8 in outside diameter clearance, 1 3/8 in overall length, and is made from 303 stainless steel.

How is this coupling installed, and which step is commonly done incorrectly?

Slide the coupling onto both shafts, align them, then tighten the 1/4-20 set screws; the step often missed is tightening both screws evenly to prevent misalignment.

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