When you need an industrial motor for an air compressor, pump, or general-duty machine, the first question isn't horsepower-it's whether your shop runs single-phase or three-phase power. The next questions are frame size, shaft style, and enclosure. The four motors below cover those angles, with listed prices from USD 141.88 to USD 455.00.
Quick Take
- For a 5 HP single-phase compressor motor with a 184T frame: the 1 Piece 5 HP Single Phase Industrial Air Compressor Electric Motor 184T Frame at USD 455.00.
- For a lower-priced single-phase 5 HP SPL motor with a 5/8\" keyed shaft: the Single Phase 5HP SPL Air Compressor Electric Motor at USD 141.88.
- For light single-phase duty on a 56C frame: the 115V/230V 3/4 HP Electric Motor at USD 144.06.
- For a three-phase 56C-frame motor: the 2 HP General Electric Motor at USD 176.80.
Listed Price Comparison
| Motor | Listed Price | Price Bar |
|---|---|---|
| 3/4 HP 56C Single-Phase Motor | USD 144.06 | |
| 5 HP 184T Air Compressor Motor | USD 455.00 | |
| 5HP SPL 56-Frame Air Compressor Motor | USD 141.88 | |
| 2 HP 3-Phase 56C TEFC Motor | USD 176.80 |
How to Decide
Match the motor to the equipment's phase, frame, and shaft. Single-phase motors fit standard household-style power; three-phase motors require a three-phase supply. The listings include frame numbers such as 56C and 184T and shaft sizes such as 5/8\" keyed, so those are the dimensions to check against your existing equipment. The two 5 HP motors here are aimed at air compressors, while the 3/4 HP and 2 HP motors cover smaller or three-phase machines.
Decision Matrix
- Need a 5 HP single-phase air compressor motor with a 184T frame? Choose the 1 Piece 5 HP Single Phase Industrial Air Compressor Electric Motor 184T Frame.
- Need a 5 HP single-phase motor at 3450 RPM with a 5/8\" keyed shaft? Choose the Single Phase 5HP SPL Air Compressor Electric Motor.
- Need a small single-phase motor for a 56C frame? Choose the 115V/230V 3/4 HP Electric Motor.
- Need a three-phase motor for a 56C frame? Choose the 2 HP General Electric Motor.
Product Notes
#### 115V/230V 3/4 HP Electric Motor Single Phase 1725 rpm 5/8'' shaft 56C Frame
This is the lightest-duty motor in the set. It's a single-phase 3/4 HP motor with a 5/8'' keyed shaft, 1725 rpm, and a 56C frame, listed at USD 144.06. The 115/230V input makes it useful for a small general-purpose setup that can run on either common single-phase voltage. The clear limitation is the 3/4 HP output: it won't move an air compressor that's built around a 5 HP motor.
#### 1 Piece 5 HP Single Phase Industrial Air Compressor Electric Motor 184T Frame
This 5 HP single-phase motor is the industrial air compressor option in this comparison. It uses a 184T frame, an ODTF enclosure, and is rated at 208-230V with 28.5-27.0 amps, and the listed details include a 2-year manufacturer warranty. It's listed at USD 455.00, the highest price in this guide, so it makes sense when your compressor is designed for a 184T frame. If you only need a smaller 56-frame motor, this is more motor than the application calls for.
#### Single Phase 5HP SPL Air Compressor Electric Motor 5/8\" Keyed Shaft 230V 3450RPM
The lowest-priced motor here, at USD 141.88, is this 5 HP single-phase SPL air compressor motor. It runs on 230V, draws 17.6 amps, spins at 3450 RPM, and uses a 56 frame with a 5/8\" keyed shaft. The enclosure is ODP. If your compressor takes a 56-frame motor and you have 230V single-phase power, this is a practical way to get 5 HP without spending more. The limitation is that it's a 230V-only, 56-frame design, so it won't cover a 115V application or an 184T-frame mount.
#### 2 HP General Electric Motor 3 Phase 56C Frame 1800 RPM TEFC 230 / 460 Volt New
This is the only three-phase motor in the group. It's a 2 HP, 56C-frame TEFC motor with 230/460V capability, listed at USD 176.80. As a three-phase motor, it belongs on equipment wired for three-phase power. The main limitation is the power requirement: it will not run from a single-phase panel. If your shop already has three-phase service and needs 2 HP in a 56C frame, this listing fits that niche.
Final Recommendation by Use Case
- For an industrial 5 HP air compressor with a 184T frame: choose the 1 Piece 5 HP Single Phase Industrial Air Compressor Electric Motor 184T Frame.
- For a lower-priced single-phase 5 HP SPL replacement: choose the Single Phase 5HP SPL Air Compressor Electric Motor if your compressor takes a 56 frame and a 5/8\" keyed shaft.
- For light single-phase duty on a 56C frame: choose the 115V/230V 3/4 HP Electric Motor.
- For three-phase equipment with a 56C frame: choose the 2 HP General Electric Motor.
No single motor fits every machine. Match the phase, frame, and shaft to the equipment you're replacing, and the right pick becomes clear.
