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Two-piece rigid steel coupling, black oxide finish, 1.87 in outside diameter

Dayton

Dayton 3ZN48 Rigid Steel Coupling 1.87 in OD 4000 RPM 2600 in-lb

SKU CH-VQ2P-B7AAY MPN 3ZN48

Rigid steel shaft coupling joins two 1 in round shafts at up to 4,000 RPM and 2,600 in-lb torque

  • Product typeDrain Components
  • Rigid carbon-steel construction resists wear
  • Two-piece design allows quick shaft alignment
  • 87 in outside diameter fits standard bores
  • Rated for 4000 RPM continuous operation
  • Handles 2600 in-lb torque without slipping

Rigid Carbon Steel Coupling

This two-piece coupling connects two 1-inch round shafts in high-speed drives. Carbon steel construction with a black oxide finish resists wear at up to 4000 RPM. It transmits a maximum torque of 2600 in-lb. The clearance diameter is 1.87 in.

Buyers needing a solid shaft connection

Suitable for maintenance crews and OEM assemblers replacing a worn rigid coupling on existing equipment. Not for applications that require flexible or elastomeric misalignment compensation. Not for installations where bore sizes differ between the two shafts.

1-inch round bore on both ends

Identical 1-inch round bores mean the part only fits shafts of that exact size. No keyways are machined, so torque transfers by friction or a separate locking method. Verify shaft diameter and speed rating before ordering.

How it compares

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

Price $57.99
Pricier than about 66% of the 4,240 comparable items (median $31.99).

Specifications

Product
Brand nameDayton
Model name3ZN48
Product typeDrain Components

Questions about this item

What shaft diameters are required for the 1 in bores on this coupling?

Both bores are 1 in round with no keyway, so you need two shafts of exactly 1 in diameter to fit the coupling.

Can the 4,000 RPM rating be used with older equipment running at lower speeds?

Yes, the coupling is rated up to 4,000 RPM and will operate safely at any speed below that limit.

How do I verify the coupling is transmitting the rated 2,600 in-lb torque after installation?

Confirm the shafts are fully seated in the 1 in bores, the two-piece clamp is tightened evenly, and no vibration or slip occurs under load.

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