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Two-piece carbon steel shaft coupling with clamp ends

Dayton

Dayton 3ZN45 Drain Trap 1 5/8 in 2 5/8 in 940 in-lb

SKU CH-AGGX-PSZCB MPN 3ZN45

Rigid two-piece carbon-steel coupling joins 1 5/8 in and 2 5/8 in round shafts, rated to 940 in-lb torque at 4,000 RPM

  • Product typeDrain Components
  • Rigid two-piece carbon steel coupling withstands high torque
  • 940 in-lb torque rating handles demanding applications
  • 1 5/8 in and 2 5/8 in bore diameters fit specific shafts
  • Round bore with 1.43 in clearance ensures precise alignment
  • Rated for 4,000 RPM maximum speed in continuous operation

Rigid Shaft Coupling for 1 5/8 in and 2 5/8 in Bores

The Dayton 3ZN45 is a two-piece carbon steel coupling designed to connect shafts with round bores of 1 5/8 in and 2 5/8 in. It suits maintenance technicians and plant engineers who need a rigid, non-flexible connection for power transmission in industrial machinery. The clamp-style construction allows straightforward installation and alignment on compatible shafts.

Replaces Worn or Damaged Rigid Couplings

This component serves as a direct replacement for failed rigid couplings of the same bore specifications and torque rating. The upgrade is worth it when the existing coupling shows signs of wear, corrosion, or keyway deformation that compromises torque transfer. It restores the rated 940 in-lb capacity without introducing flexibility or backlash into the drivetrain.

Sustained Operation at 4 000 RPM and 940 in-lb

Under continuous load, the carbon steel body transmits the full 940 in-lb torque rating up to the maximum speed of 4 000 RPM. The rigid two-piece clamp design maintains shaft alignment and prevents relative movement between halves during extended duty cycles. The 1.43 in clearance diameter ensures consistent fit without play that could accelerate wear under sustained rotation.

How it compares

Measured against everything we stock in Drain Stoppers, Strainers & Traps, at today’s prices. Recalculated every night.

Price $23.99
Cheaper than about 59% of the 4,240 comparable items (median $31.99).

Specifications

Product
Brand nameDayton
Model name3ZN45
Product typeDrain Components

Questions about this item

What bore diameters does the 3ZN45 coupling accept?

The coupling fits a 1 5/8 in bore on one side and a 2 5/8 in bore on the other, both round.

How do I install the two-piece clamp correctly?

Align both halves on the shafts, insert the bolts, and torque them evenly to 940 in-lb so the clamp seats fully.

When should I inspect or replace this carbon-steel coupling?

Check for wear or corrosion at each scheduled maintenance; replace if the bore shows deformation or the torque rating can no longer be held.

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