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Cylindrical zinc-plated steel coupling with keyed bores

Dayton

Dayton 3ZN52 Rigid Steel Coupling 1-1/2 in Bore 2-1/2 in OD 4-1/2 in Length 1600 RPM 1600 in-lb Torque

SKU CH-MNJP-RGRZ7 MPN 3ZN52

Zinc-plated carbon-steel rigid coupling joins two 1-1/2 in keyed shafts at up to 1,800 RPM and 1,600 in-lb torque

  • TypeDrain Components
  • Zinc-plated carbon steel resists corrosion in plumbing systems
  • One-piece rigid design maintains shaft alignment under load
  • 1600 in-lb torque rating handles demanding power transmission
  • 1800 RPM maximum speed supports high-speed applications
  • 5 in outside diameter fits standard piping configurations

Rigid steel coupling for 1-1/2 in shafts

The Dayton 3ZN52 is a one-piece carbon-steel shaft coupling with a zinc-plated finish. It accepts two identical round keyed bores of 1-1/2 in diameter and is suited to inline power transmission between matched shafts.

Capacity and speed limits

The coupling transmits up to 1,600 in-lb of torque at a maximum speed of 1,600 RPM. Its 2-1/2 in outside diameter and 4-1/2 in overall length define the space envelope. Operation beyond the rated torque or speed will exceed the design limits.

Keyed bore with 3/8 in and 3/16 in keyways

Each bore includes a 3/8 in wide by 3/16 in deep keyway to lock the coupling to the shaft. The rigid one-piece construction provides no misalignment compensation, so shafts must be precisely aligned during installation.

Highlights

  • Zinc-plated carbon steel resists corrosion in plumbing systems
  • One-piece rigid design maintains shaft alignment under load
  • 1600 in-lb torque rating handles demanding power transmission
  • 1800 RPM maximum speed supports high-speed applications
  • 5 in outside diameter fits standard piping configurations

Specifications

TypeDrain Components
BrandDayton
Model3ZN52

Questions about this item

Will the 1-1/2 in bore fit the existing shaft on my older motor?

The coupling has a 1-1/2 in round keyed bore with 3/8 in keyway width and 3/16 in keyway depth on both ends. Measure your shaft diameter and keyway to confirm an exact match.

How can I verify the 1600 RPM rating is safe for my application?

The maximum speed is 1600 RPM and maximum torque is 1600 in-lb. Compare these limits to your motor nameplate data and driven load requirements before installation.

Does the box include set screws or keys for the 3/8 in keyway?

The one-piece carbon steel coupling is zinc plated and ships as a single rigid unit. Keys and set screws are not included and must be sourced separately to match the 3/8 in keyway.

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