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Dayton 1/4 HP open drip proof motor cradle base horizontal mount

Dayton

Dayton 30PT50 Motor 1/4 HP 1140 RPM 115V Fan Accessory

SKU CH-9QVS-MD10S

A 1/4 hp capacitor-start/run motor runs at 1,140 RPM on 115/230 V AC with a 56 frame and cradle base

  • Product weight25.2
  • Product typeClosed Base
  • 1/4 hp continuous duty for steady airflow
  • Capacitor-start/run design delivers reliable starting torque
  • 115/230 V dual-voltage suits common supplies
  • Auto thermal protection guards against overload
  • 56 frame cradle base fits standard mounts

Motor Purpose and Fit

This Dayton general-purpose motor delivers 1/4 horsepower at 1,140 RPM for fan accessory applications. It operates on 115/230V AC single-phase power with a 56 frame and cradle base mounting. The unit suits horizontal installations requiring continuous duty in ambient temperatures up to 40°C.

Voltage and Speed Constraints

The motor runs at a fixed 1,140 RPM on 60 Hz supply with no multi-speed option. Full-load current draws 3.7A at 115V or 1.9A at 230V, and the design is not inverter rated for variable-frequency drives. Auto thermal protection and a 1.35 service factor support sustained operation within these electrical limits.

Critical Selection Specification

The capacitor-start/run design produces 62.2% efficiency at nameplate load, which determines whether this motor matches the energy profile of the fan system. Shaft rotation is reversible between CW and CCW, and the open drip-proof enclosure suits dry, ventilated locations.

How it compares

Measured against everything we stock in Fan Motors, Parts & Clip-On Fans, at today’s prices. Recalculated every night.

Price $303.99
Pricier than about 86% of the 473 comparable items (median $38.99).

Specifications

Product
Brand nameDAYTON
Product typeClosed Base

Questions about this item

Should I choose the 115 V or 230 V connection for my installation?

The motor is dual-voltage; use 115 V for standard household circuits drawing 3.7 A full load, or 230 V where available to halve the current to 1.9 A.

What does the 1/4 hp rating deliver on a fan load?

At 1,140 RPM the motor provides 1/4 hp continuous output with a 1.35 service factor for short overloads on fan blades.

How does the 56 frame and cradle base affect mounting?

The NEMA 56 frame and cradle base give standard bolt spacing for horizontal mounting on fan housings or brackets.

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