Choosing an industrial motor comes down to three decisions: what phase and voltage your shop supplies, what speed and horsepower the machine needs, and how much enclosure protection the environment demands. This guide compares four new motors: a 3/4 HP unit plus three 5 HP motors. If you're replacing a motor on a pump, compressor, conveyor, or machine tool, the right pick depends on matching the electrical supply and workload.
Quick Take
The 3/4 HP motor is the only fractional-horsepower choice in this group. It runs on single-phase power and spins at 1725 RPM. The three 5 HP motors split into two single-phase air compressor options and one three-phase severe-duty option. The single-phase compressor motors sit at the upper end of the price range, while the three-phase severe-duty motor is the lower-priced 5 HP motor.
Listed Price Comparison
| Motor | Listed Price | Price Bar | Phase | Voltage | Enclosure |
|---|---|---|---|---|---|
| 3/4 HP 56C Frame | $144.06 | Single phase | 115/230V | TEFC, IP55 | |
| 5 HP 184T Air Compressor | $449.99 | Single phase | 208-230V | TEFC, IP54 | |
| 5 HP 184T Severe Duty | $330.95 | Three phase | 230/460V | TEFC, IP55 | |
| 5 HP 184T Compressor | $455.00 | Single phase | 208-230V | ODTF |
Decision Matrix
- Need fractional horsepower on 115/230V single phase? The 3/4 HP motor is the match if your machine specifies 3/4 HP or less and uses a 5/8-inch keyed shaft.
- Need 5 HP on single phase with TEFC protection? The 5HP 1750RPM motor gives you IP54-rated protection, a rolled-steel shell, and 1750 RPM.
- Need three-phase power and heavy-duty construction? The 1800 RPM 5 HP motor offers dual voltage, Class F insulation, and a 1.15 service factor.
- Need a single-phase 5 HP compressor motor with a 2-year warranty? The 1 Piece 5 HP Single Phase motor carries a 2-year warranty.
Product Notes
115V/230V 3/4 HP Electric Motor Single Phase 1725 rpm 5/8'' shaft 56C Frame
The smallest motor here is the least expensive in this group. It is a single-phase induction motor rated 3/4 HP with a 1725 RPM base speed and a 5/8-inch keyed shaft. Reversible rotation makes it easy to match to light-duty tools, small pumps, conveyors, or fans. The limitation is output: at 3/4 HP, it won't drive the 5 HP compressor heads or heavy industrial loads the other motors in this group are designed for. If your machine needs only a fractional-horsepower motor, this compact unit saves you money.
5HP 1750RPM Air Compressor Electric Motor 184T Single Phase TEFC 208-230V
This 5 HP motor is built for single-phase air compressor duty. It spins at 1750 RPM and uses a rolled-steel shell with a protector included. The single-phase connection fits shops that don't have three-phase power, and the 28.5-27A current draw gives you a concrete electrical specification to match against your starter and wiring. The trade-off is price: it costs more than the severe-duty three-phase motor. Choose this one if you need 5 HP, single-phase supply, and a compressor-focused motor.
1800 RPM 5 HP Electric Motor 184T Frame TEFC 230/460V Severe Duty 3 Phase
This 5 HP severe-duty motor is the only three-phase option in the group, and it is the lower-priced 5 HP motor. It delivers 1800 RPM with a 1.15 service factor for 25% overload and Class F insulation. The dual-voltage connection makes it flexible for industrial setups, and the 1-1/8-inch keyed shaft suits pumps, conveyors, and compressors in demanding environments. The catch is the supply: it requires three-phase power, so it won't run from a standard single-phase panel. If you have three-phase available, this gives you severe-duty construction and dual voltage at a lower price than the single-phase 5 HP motors.
1 Piece 5 HP Single Phase Industrial Air Compressor Electric Motor 184T Frame
The most expensive motor in this group, this 5 HP single-phase unit is positioned as a direct replacement for air compressor duty. It draws 28.5-27.0A and carries a 2-year manufacturer warranty. The open dripproof (ODTF) enclosure offers less protection against dust and dirt than a totally enclosed motor, so it's better suited to a clean, dry indoor location. Choose it when you want a single-phase, 5 HP motor with a direct-replacement fit, and when your installation is dry and clean enough for an open enclosure. The higher price and ODTF enclosure are the main trade-offs.
Final Recommendation
Match the motor to your electrical service and workload. If your shop has three-phase power, the severe-duty three-phase 5 HP motor is the lowest-priced 5 HP option and adds severe-duty construction. If your shop is single-phase only and you need 5 HP air compressor duty, the TEFC compressor motor costs a bit less than the direct-replacement motor and uses an enclosed fan-cooled housing; choose the direct-replacement motor when the fit matters more. For light-duty fractional-horsepower tasks, the 3/4 HP motor costs less than the 5 HP options and still gives you a reversible motor on single-phase power.
