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Black oxide steel rigid coupling, one-piece carbon steel construction

Dayton

Dayton 3ZN32 Rigid Steel Coupling 1.19 in 480 in-lb

SKU CH-RK2H-S99WE MPN 3ZN32

Rigid carbon-steel shaft coupling with a 1.19 in clearance diameter rated to 480 in-lb torque

  • TypeDrain Components
  • Rigid one-piece carbon steel construction ensures precise shaft alignment
  • Black oxide steel finish resists corrosion in demanding environments
  • 480 in-lb torque capacity handles heavy-duty power transmission
  • 4,000 RPM maximum speed supports high-speed applications
  • 19 in clearance diameter fits standard shaft sizes

Rigid Steel Coupling

The Dayton 3ZN32 is a one-piece rigid shaft coupling made from carbon steel with a black oxide finish. It connects two shafts with identical 1 1/2 in round bores and a 1.19 in clearance diameter. The coupling handles up to 480 in-lb of torque at speeds up to 4,000 RPM.

Suitable Applications

This coupling suits maintenance and OEM tasks where a fixed, zero-backlash connection is required between same-size shafts. It is not for installations needing misalignment compensation, vibration damping or different bore diameters on each end. Builders requiring a flexible or keyed alternative should look at other coupling styles.

Torque Rating Decides Fit

The 480 in-lb maximum torque rating is the single figure that confirms whether this coupling matches the load. Exceeding this value risks mechanical failure, so verify the application's peak torque before selecting this part.

Highlights

  • Rigid one-piece carbon steel construction ensures precise shaft alignment
  • Black oxide steel finish resists corrosion in demanding environments
  • 480 in-lb torque capacity handles heavy-duty power transmission
  • 4,000 RPM maximum speed supports high-speed applications
  • 19 in clearance diameter fits standard shaft sizes

Specifications

TypeDrain Components
BrandDayton
Model3ZN32

Questions about this item

Will the carbon steel coupling need periodic lubrication or replacement due to wear?

The one-piece carbon steel construction with black oxide finish has no internal moving parts or keyways, so it does not require lubrication and replacement is only needed if the coupling itself is damaged or the bore diameters no longer match the shafts.

At 4,000 RPM continuous operation, does the 480 in-lb torque rating or the speed limit become the governing constraint?

The 480 in-lb torque rating is the primary limit; exceeding it risks coupling failure, while the 4,000 RPM speed limit is a separate mechanical boundary that must also not be surpassed.

How much heat or noise does the rigid steel coupling generate when running all day at rated speed and torque?

As a solid one-piece carbon steel component with no bearings or friction surfaces, it produces negligible heat and no audible noise during normal operation at up to 4,000 RPM and 480 in-lb torque.

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