3.7 HP Air Compressor Motor Single Phase 3450 RPM 56 Frame 5/8" Shaft Diameter
This page is affiliate-supported. Prices and availability can change after the last marketplace refresh.
About this product
The BFO 3.7 HP air compressor motor is a single-phase unit operating at 3450 RPM. Designed for continuous compressor duty, it features a 56-frame, base-mounted design with a 5/8 inch keyed shaft that is 1.88 inches long. It has an Open Drip Proof (ODP) enclosure, an F insulation class, and a 1.0 service factor. Manufactured in China, this non-reversible motor comes with a 1-year manufacturer warranty and is intended as a direct replacement.
Our take
This 3.7 HP BFO motor is a strong contender for replacing an existing air compressor motor, particularly if you're comfortable with a 3450 RPM single-phase setup. The 'Cont. Compressor' duty rating is reassuring for longevity in tough applications. The 56 frame and 5/8-inch shaft are common dimensions, making it a good direct replacement candidate. However, it's worth noting the ODP enclosure means it's not fully sealed against moisture or dust, limiting its suitable environments. The lack of included instructions suggests this is best for experienced installers.
Pros & Cons
Pros
- 3.7 HP for continuous duty
- Standard 56 frame size
- 5/8" keyed shaft for compatibility
- 1-year manufacturer warranty
Cons
- Open Drip Proof (ODP) enclosure
- Non-reversible rotation
- No instructions included
Specifications
- AC Frequency Rating 60HZ
- Base RPM 3450 RPM
- Brand BFO
- California Prop 65 Warning California Prop 65 Warning
- Country of Origin China
- Current Type AC
Show all 33 specifications
- Duty
- Cont. Compressor
- Enclosure Type
- Open Drip Proof (ODP)
- Fitment Type
- Direct Replacement
- Frame Size
- 56
- Full Load Amps
- 17.2
- IEC Frame Size
- 56
- Insulation Class
- F
- Manufacturer Part Number
- LIAVNE
- Manufacturer Warranty
- 1 Year
- Model
- 3.7 HP Electric Motor
- Mounting Type
- Base-Mounted
- NEMA Frame Suffix
- 56
- Note
- No Instruction Included
- Notice
- This is aftermarket replcement part., California Prop 65 Warning.
- Phase
- Single Phase
- Quantity
- 1 x Compressor Electric Motor
- Rated Load (HP)
- 3.7 HP
- Reversible/Non-Reversible
- Non-Reversible
- Service Factor
- 1.0
- Shaft Diameter
- 5/8"
- Shaft Length
- 1.88"
- Shaft Type
- Keyed
- Standard Size Keyway
- 3/16"
- Surface Finish
- Brand New
- Unit Quantity
- 1
- Unit Type
- Electric Motor
- Voltage
- 230 Volts
