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Black oxide steel rigid shaft coupling, 1.64 in clearance diameter

Dayton

Dayton 3ZN34 Rigid Shaft Coupling 1.64 in 1950 in-lb 4000 RPM

SKU CH-BQZY-Q37Y8 MPN 3ZN34

Rigid carbon-steel shaft coupling with 1.64 in clearance, rated 1950 in-lb at 4000 RPM

  • TypeDrain Components
  • Rigid one-piece carbon-steel construction resists misalignment
  • 4000 RPM rating handles high-speed drives
  • 1950 in-lb torque capacity powers heavy loads
  • 64 in clearance fits standard shafts
  • Black oxide finish protects against corrosion

Rigid Shaft Coupling for Industrial Drives

The Dayton 3ZN34 is a one-piece rigid coupling machined from carbon steel with a black oxide finish. It joins two shafts of identical 1 3/4 in round bore diameter and transmits torque without flexibility or misalignment compensation. This design suits fixed-alignment installations where precise shaft registration is maintained.

Speed and Torce Limits Define Safe Operation

The coupling is rated for a maximum speed of 4,000 RPM and a maximum torque of 1,950 in-lb. Exceeding either limit risks mechanical failure or accelerated wear. The 1.64 in clearance diameter sets the envelope for adjacent components, so surrounding hardware must stay clear of this radial space during rotation.

Identical Bore Sizes Are Mandatory

Both bores measure 1 3/4 in with no keyway provision, so the coupling only fits shafts of that exact diameter and round profile. Builders needing different bore diameters, keyed shafts, or any misalignment tolerance must select a different coupling style.

Highlights

  • Rigid one-piece carbon-steel construction resists misalignment
  • 4000 RPM rating handles high-speed drives
  • 1950 in-lb torque capacity powers heavy loads
  • 64 in clearance fits standard shafts
  • Black oxide finish protects against corrosion

Specifications

TypeDrain Components
BrandDayton
Model3ZN34

Questions about this item

Which bore diameter matches my 1.64 in clearance requirement?

The coupling has a 1.64 in clearance diameter and two round bores at 1 3/4 in and 3/4 in, so select the bore that matches your shaft size.

What does the 1950 in-lb torque rating mean when the coupling is installed?

The maximum torque the coupling can transmit is 1,950 in-lb, which is the limit you should not exceed in your application.

How does the 4000 RPM speed limit affect the coupling in a real machine?

The coupling is rated for a maximum speed of 4,000 RPM, so your shaft speed must stay at or below this value.

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