Dayton
Dayton 4YFG8 Unit Bearing Motor 1/185 hp 115V AC 0.34 A 1550 RPM
Compact shaded-pole motor delivers 1/185 hp at 1,550 RPM on 115 V AC for HVAC fan and blower duty
- ColorTransparent
- Reliable HVAC operation with shaded-pole single-phase design
- Consistent airflow from 1/185 hp motor at 1550 RPM
- Safe low-voltage performance on 115V AC at 0.34 A
- Durable cast-iron frame with totally enclosed air-over enclosure
- Flexible mounting in horizontal or vertical shaft-up positions
Dayton 4YFG8 Unit Bearing Motor
The Dayton 4YFG8 is a shaded-pole unit bearing motor rated at 1/185 horsepower. It delivers 4 watts of output at 1,550 RPM for HVAC air-mover applications. The motor operates on 115V AC single-phase power and draws 0.34 amps at full load. It is suited for technicians replacing a direct-drive blower or fan motor in compatible equipment.
Voltage frequency and mounting checks
Confirm the supply voltage is 115V AC and that the source can provide 60 or 50 Hz operation. Verify the existing mounting uses a rear-foot pattern on a non-standard frame with a clockwise lead-end shaft rotation. Ensure the ambient temperature at the install location will not exceed 40 degrees Celsius and that the motor can be mounted with the shaft horizontal or vertical shaft up.
Totally enclosed air-over enclosure
The totally enclosed air-over design requires airflow from the driven fan or blower wheel for proper cooling. The cast-iron frame provides rigid mounting on the rear foot pattern in either horizontal or vertical shaft-up orientation. Impedance thermal protection and Class A insulation protect the windings during normal operation. The motor frees the installer from separate bearing assemblies by integrating the unit bearing directly.
Highlights
- Reliable HVAC operation with shaded-pole single-phase design
- Consistent airflow from 1/185 hp motor at 1550 RPM
- Safe low-voltage performance on 115V AC at 0.34 A
- Durable cast-iron frame with totally enclosed air-over enclosure
- Flexible mounting in horizontal or vertical shaft-up positions
Specifications
| Brand | DAYTON |
|---|---|
| Color | Transparent |
Questions about this item
What comes with the Dayton 4YFG8 motor and do I need to buy a capacitor separately?
The motor is supplied as a single unit; shaded-pole design means no external capacitor is required for operation.
How do I decide between the 1/185 hp and 4 W ratings when selecting this motor?
Both figures describe the same output — 1/185 hp equals approximately 4 W — so choose based on the rating your equipment specifies.
What does the 1550 RPM nameplate speed mean once the motor is installed in my HVAC unit?
It indicates the shaft turns at 1550 revolutions per minute under full load at 115 V AC, 60/50 Hz, delivering 4 W output.
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