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Two-piece carbon steel shaft coupling with black oxide finish

Dayton

Dayton 3ZN46 Rigid Steel Coupling Trap 4000 RPM 1950 in-lb

SKU CH-2TM8-KX664 MPN 3ZN46

Connects two shafts with a two-piece carbon steel design rated for 4,000 RPM and 1,950 in-lb torque

  • Product typeDrain Components
  • Rigid carbon-steel construction withstands heavy-duty use
  • Two-piece design allows straightforward installation
  • Black oxide finish resists corrosion in harsh environments
  • Rated for 4000 RPM maximum rotational speed
  • Handles up to 1950 in-lb maximum torque

Rigid Steel Coupling

This Dayton 3ZN46 rigid shaft coupling connects two shafts with identical 3/4 in round bores. The two-piece carbon steel construction features a black oxide finish for corrosion resistance. It is designed for power transmission in industrial machinery and automotive applications.

Two-Piece Construction

The coupling splits into two halves for installation without moving connected equipment. A 1.63 in clearance diameter fits standard shaft arrangements. Carbon steel handles the rated 4,000 RPM and 1,950 in-lb torque capacity. No keyways are required for this bore configuration.

Direct Replacement Fit

Matching bore sizes eliminate the need for adapter bushings or custom machining. The rigid design maintains precise shaft alignment under load. Black oxide steel reduces maintenance in damp or chemical environments. This unit replaces worn couplings in existing drive lines.

How it compares

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

Price $26.99
Cheaper than about 56% of the 4,240 comparable items (median $31.99).

Specifications

Product
Brand nameDayton
Model name3ZN46
Product typeDrain Components

Questions about this item

What maximum speed does the 4000 RPM rating cap for this coupling?

The 4000 RPM rating caps the maximum rotational speed at 4,000 RPM for the Dayton 3ZN46 rigid steel coupling.

What bore diameters must the shafts match to fit the 1-3/4 in and 2-3/4 in bores?

The coupling requires one shaft of 1-3/4 in diameter and another of 2-3/4 in diameter, both with round bores, to fit the two-piece carbon steel construction.

How is the two-piece coupling installed, and what alignment step is often missed?

The two-piece carbon steel coupling clamps onto each shaft; the step often missed is aligning both bores precisely before tightening to avoid binding at 4,000 RPM.

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