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Ruland rigid shaft coupling 20 mm bore 1215 lead free steel black oxide finish

Ruland Manufacturing

Ruland Manufacturing Rigid Shaft Coupling 20 mm 1215 Lead Free Steel

SKU CH-APW4-VZB08

Rigid shaft coupling joins two 20 mm shafts with a 6 mm keyway, rated to 4,000 RPM in 1215 lead-free steel with black oxide finish

  • Precision fit with 20 mm bore diameter
  • Secure hold via M6 set screw design
  • Corrosion resistance from black oxide finish
  • High-speed capability up to 4,000 RPM
  • Durable construction using 1215 lead-free steel

Rigid Shaft Coupling 20 mm

The Ruland Manufacturing rigid shaft coupling connects two 20 mm shafts in a fixed alignment. It is built from 1215 lead-free steel with a black oxide finish and uses a set-screw locking method. The coupling suits motion-control assemblies that require zero backlash between shafts.

Sustained Operation at 4 000 RPM

The coupling is rated for continuous speeds up to 4 000 RPM without degradation of the set-screw grip. The solid 1215 steel body resists torsional wind-up under steady torque loads. Heat buildup remains minimal because there are no flexible elements to generate hysteresis losses.

20 mm Bore with 6 mm Keyway

The 20 mm bore diameter and 6 mm keyway width determine whether the coupling matches the shaft and key stock in your drive train. Both dimensions must match exactly; otherwise the coupling cannot transmit torque reliably.

How it compares

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

Price $52.99
Pricier than about 67% of the 1,290 comparable items (median $28.99).

Specifications

Product
Brand nameRULAND MANUFACTURING

Questions about this item

Does the 1215 lead-free steel coupling generate noticeable heat or noise when run continuously at 4,000 RPM?

As a solid mechanical component with no moving internals, the coupling itself produces no noise or heat; any temperature rise comes from the connected shafts and bearings.

What shaft size and keyway must my motor and driven equipment already have to use this 20 mm bore coupling?

Both shafts need a 20 mm diameter with a 6 mm keyway to match the coupling's bore and keyway dimensions.

Will the 42 mm outside diameter and 65 mm overall length fit between the flanges on my existing gearbox and motor?

The coupling measures 42 mm in outside diameter and 65 mm long; compare those dimensions to the gap and flange clearance on your current assembly.

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