U.S. Motors 1789 Motor 1/3 HP 1725/1425 RPM 48 230V - 1789
The U.S. Motors 1789 is a robust belt drive motor designed for single-phase applications. This motor supports 1/3 HP and operates at speeds of 1725 and 1425 RPM. It is constructed with a 48 frame and operates at 230V AC, making it ideal for various HVAC and blower operations.
Product Highlights
The U.S. Motors 1789 belt drive motor is designed for continuous duty and features a robust steel frame. It includes auto thermal protection and operates within a 104-degree Fahrenheit max ambient temperature. Ideal for horizontal mounting positions.
Features
- Suitable for HVAC and blower applications
- Continuous duty cycle
- Includes auto thermal protection
Specifications
| Item |
Belt Drive Motor |
| Horsepower |
1/3 HP |
| RPM Range |
1,701-1,800 RPM |
| Voltage |
230V AC |
| Phase |
Single Phase |
| Motor Design |
Split-Phase |
| Nameplate RPM |
1,725/1,425 RPM |
| Body Diameter |
5 3/5 inches |
| Shaft Diameter |
1/2 inch |
| Shaft Length |
1 281/500 inches |
| Motor Frame Material |
Steel |
| Insulation Class |
A |
| Full Load Amps |
2.9 amps |
| Number of Speeds |
2 |
| Max. Ambient Temperature |
104°F |
| Motor Shaft Rotation |
CCWLE |
| Motor Enclosure Design |
Open Dripproof |
| Motor Mounting Type |
Cradle Base |
| Motor Mounting Position |
Horizontal |
| Duty Cycle |
Continuous |
| Nominal Efficiency |
64.6% |
| Extended Thru-Bolts |
Yes |
| Usable @ 200V |
No |
| Usable @ 208V |
No |
| Motor Bearings |
Ball Bearings |
| Overall Length |
10 43/100 inches |
| Length Less Shaft |
8 7/8 inches |
| Resilient Ring Diameter |
2 1/2 inches |
| Ring to Ring Center |
4 3/16 inches |
| Motor Service Factor |
1.35 |
| Motor Shaft Design |
Flat |
| Motor Sub Application |
Belt Drive Fans/Blowers |
| Motor Application |
HVAC/R |
| Voltage Compatibility |
Multiple options (e.g., 115V, 200V, 230V, 460V, etc.) |
| Includes Shaft Bushing |
No |
| Manufacturers Warranty Length |
1 year |
| Country of Origin |
Mexico (subject to change) |
| Brand |
U.S. Motors |
| MPN |
1789 |
What our Experts Think
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Compact Power: 1/3 HP motor delivers steady performance for light-duty applications in commercial and industrial settings.
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Dual Speed Operation: Runs at 1725/1425 RPM, offering flexibility for equipment requiring variable speeds.
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Standard 48 Frame: Easily integrates with compatible systems—ideal for fans, blowers, and small machinery.
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Single Voltage Design: Operates on 230V, suitable for dedicated single-phase power setups.
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Reliable and Efficient: Designed for consistent, low-maintenance operation.
Q&A
Q: What is the U.S. Motors 1789?
A: The 1789 is a 1/3 HP, single-phase motor designed for general-purpose use, operating at dual speeds of 1725/1425 RPM with a 48 frame and 230V power supply.
Q: What are the key features?
A: 1/3 horsepower, 1725/1425 RPM dual speed, 48 frame size, single voltage (230V), and dependable single-phase performance.
Q: Where is this motor typically used?
A: Suitable for light-duty machinery, fans, blowers, small pumps, and other general-purpose equipment.
Q: Why choose the 1789 model?
A: It offers reliable, quiet operation with flexible speed options—ideal for equipment needing moderate, consistent power.
Q: Is this motor easy to install?
A: Yes, the compact 48 frame allows for flexible mounting in tight or space-limited setups.
Maintenance Tips
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Clean motor exterior regularly to prevent dust buildup and ensure proper cooling.
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Inspect and lubricate bearings per manufacturer guidelines for smooth performance.
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Verify voltage supply (230V) aligns with nameplate rating for efficient operation.
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Check mounting and alignment to minimize vibration and mechanical stress.
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Monitor temperature and noise during operation to detect early wear or faults.
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Test insulation resistance annually to maintain electrical safety and motor lifespan.
