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Dayton 1/4 HP open drip-proof motor cradle base

Dayton

Dayton 30PT46 1/4HP 1725 48Z ODP Motor

SKU CH-DWTE-JWQBT

Single-phase capacitor-start motor delivers 1/4 hp at 1,725 rpm on 115/230 V AC with 1.35 service factor

  • weight18.3
  • typeClosed Base
  • 1/4 hp capacitor-start motor delivers reliable single-phase power
  • 1725 RPM at 60 Hz suits continuous-duty fan applications
  • Dual-voltage 115/230 V wiring simplifies installation
  • 48Z frame with cradle-base mount fits standard brackets
  • Open drip-proof enclosure rated for 40 °C ambient operation

Dayton 30PT46 1/4 HP General Purpose Motor

The Dayton 30PT46 is a single-phase capacitor-start/run motor rated at 1/4 hp and 1725 RPM. It operates on 115/230V AC at 60 Hz with a 48Z frame and cradle base mounting. The motor is designed for continuous duty in horizontal orientation with automatic thermal protection and Class B insulation.

Thermals Noise And Power Draw

Open drip-proof enclosure allows airflow for cooling while the 1.35 service factor provides margin above nameplate load. Full-load current measures 3.1 amps at 115V or 1.5 amps at 230V with a maximum ambient temperature of 40 degrees C. The design targets 68.5 percent efficiency during normal operation.

Replaces Worn Single Phase Motors

This unit serves as a direct replacement for failed capacitor-start/run motors in fans, blowers and similar equipment requiring a 48Z frame and cradle base. The upgrade is worth it when the original motor shows reduced starting torque, overheating or bearing noise after extended continuous service. Not suited for variable-speed drives or inverter-fed applications.

Highlights

  • 1/4 hp capacitor-start motor delivers reliable single-phase power
  • 1725 RPM at 60 Hz suits continuous-duty fan applications
  • Dual-voltage 115/230 V wiring simplifies installation
  • 48Z frame with cradle-base mount fits standard brackets
  • Open drip-proof enclosure rated for 40 °C ambient operation

Specifications

BrandDAYTON
weight18.3
typeClosed Base

Questions about this item

How is the cradle-base motor mounted and what alignment step is often missed?

Bolt the 48Z frame cradle base horizontally, then align the shaft to the driven load before tightening — misalignment causes vibration and bearing wear.

What maintenance will the capacitor-start/run motor need over time?

The sealed bearings are lubricated for life; plan to replace the start capacitor and run capacitor when the motor struggles to start or hums without turning.

At what ambient temperature does the 1.35 service factor stop protecting the motor?

The 1.35 service factor applies up to 40 °C; above that temperature the winding insulation class B reaches its limit and the motor must be derated.

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