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Dayton 1.5 hp capacitor-start/run motor, open drip-proof enclosure, cradle base, 56 frame

Dayton

Dayton 30PT81 1 1/2 hp 115/230V capacitor-start/run machinery motor

SKU CH-05BR-5F0XW

A 1 1/2 hp single-phase capacitor-start/run motor with a 56 frame, 1725 RPM, and dual 115/230V voltage for continuous-duty machinery

  • Product weight41
  • Product typeClosed Base
  • 1 1/2 hp output for demanding machinery tasks
  • Dual 115/230V voltage fits common shop wiring
  • 1,725 rpm single-speed suits steady-load applications
  • 56 frame with cradle base simplifies horizontal mounting
  • Continuous duty rating handles long running cycles

Motor type and rating

This Dayton 30PT81 is a single-phase capacitor-start/run motor rated at 1 1/2 hp for general-purpose machinery use. It runs at 725 RPM on 60 Hz power and carries a 1.15 service factor for continuous duty. The 56 frame size and cradle base mounting suit horizontal installations.

Electrical supply and protection

Confirm your supply matches the dual-voltage 115/230V AC rating and that the circuit can deliver 13.4 amps at 115V or 6.7 amps at 230V. The motor has no built-in thermal protection and is not inverter rated, so external overload protection and a fixed-frequency supply are required. Maximum ambient temperature is 40 degrees C.

Replacement scope

This unit replaces an open drip-proof motor of the same 56 frame, 1 1/2 hp, 725 RPM rating with CW/CCW rotation capability. The jump is worth it when the existing motor has failed or lacks the 1.15 service factor for continuous loads. It does not suit applications needing inverter duty, vertical mounting or built-in thermal overload.

How it compares

Measured against everything we stock in Industrial Motors & Machine Parts, at today’s prices. Recalculated every night.

Price $612.99
Pricier than about 87% of the 397 comparable items (median $91.99).

Specifications

Product
Brand nameDAYTON
Product typeClosed Base

Questions about this item

Does the Dayton 30PT81 ship with a capacitor or must I purchase one separately?

The motor is a capacitor-start/run design, meaning the start and run capacitors are integral to the unit and no separate capacitor purchase is required for standard operation.

How do I choose between the 115V and 230V wiring on the Dayton 30PT81?

The motor is dual-voltage rated at 115/230V; select the lower voltage for 13.4 A full-load current or the higher voltage for 6.7 A by following the internal connection diagram on the nameplate.

What does the 1 1/2 hp rating deliver on a real 56-frame machine?

At 1 1/2 hp the motor produces 1,725 RPM under continuous duty with a 1.15 service factor, drawing 13.4 A at 115 V or 6.7 A at 230 V in an open drip-proof 56-frame enclosure.

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