Quick take
Choosing an industrial motor means matching the motor to the machine it has to drive, the power supply available, and the physical space it has to fit into. These four motors show how wide that decision can stretch: one vintage single-phase unit on the small end, two 1800 RPM three-phase TEFC motors in the middle, and a large 15 HP three-phase motor at the top. The listed prices range from $70 to $1,500, so the final pick should be driven by the workload first and the price tag second.
Listed price comparison
| Motor | Listed Price | Price Bar |
|---|---|---|
| 3 HP 3 Phase Electric Motor, 182T Frame TEFC, 1800 RPM | USD 363.99 | |
| 5 HP 3 Phase Electric Motor, 184T Frame TEFC, 1800 RPM | USD 332.63 | |
| Dayton 15 HP Industrial Electric Motor, 254T Frame TEFC, 1770 RPM | USD 1,500.00 | |
| Vintage 1/100 HP Electric Motor, 115V, 1550 RPM | USD 70.00 |
Decision matrix
| Decision Factor | 3 HP 182T TEFC | 5 HP 184T TEFC | Dayton 15 HP 254T TEFC | Vintage 1/100 HP |
|---|---|---|---|---|
| Horsepower | 3 HP | 5 HP | 15 HP | 1/100 HP |
| Phase | Three | Three | Three | Single |
| Input Voltage | 230/460V | 230/460V | 230/460V | 115V |
| Rated Speed | 1800 RPM | 1800 RPM | 1770 RPM | 1550 RPM |
| Condition | New | New | New - Open box | Used |
Product notes
#### 3 HP 3 Phase Electric Motor 1800 RPM 182T Frame 230/460V TEFC Premium Efficiency
This is a direct-replacement-style motor for three-phase equipment built around an 182T frame. It runs at 1800 RPM on 60 Hz, accepts 230/460V input, and uses a TEFC enclosure, with a 1.25 service factor and Class F insulation supporting continuous operation. The premium-efficiency spec and keyed, base-mounted design make it a solid fit for machinery that already runs on three-phase power. The catch: it needs a three-phase supply, and the keyed shaft must line up with the driven component's bore. It is also the higher-priced of the two 1800 RPM motors here.
#### 5 HP 3 Phase Electric Motor 1800 RPM 184T Frame TEFC 230/460 Volt Severe Duty AC
The 184T frame gives this motor more load capacity than the 3 HP unit while keeping the same three-phase, TEFC setup, and it carries the lowest listed price among the three-phase options in this group. The severe-duty construction and 50/60 Hz rating add flexibility for industrial settings that run on different supply frequencies. The full-load speed is listed at 1755 RPM rather than the nominal 1800 RPM. It is also a heavy unit at 104 pounds, so mounting takes planning, and it still requires three-phase power rather than a residential single-phase circuit.
#### Dayton 15 HP Industrial Electric Motor 230/460V 3-Phase TEFC 1770 RPM Frame 254T
This Dayton is the only 15 HP motor in the lineup and the clear pick when the driven equipment demands 15 HP. The specs include a 254T frame, 230/460V three-phase input, 60 Hz operation, 1770 RPM, and full-load amps of 37.5/18.8 A, with continuous-duty service. It is positioned for pumps, compressors, conveyors, fans, and blowers. It is listed as new open-box, so it has never been installed or used but arrives without the original manufacturer's packaging and may have minor cosmetic marks from storage and handling. Buyers should also weigh the top listed price in this group.
#### Vintage 1/100 HP Electric Motor 115V 1550 RPM Industrial USA Tested Works
This vintage unit takes a different approach: 1/100 HP at 115V, spinning 1550 RPM, with the title noting it has been tested and works. It runs on a 115V single-phase supply and is small enough for light-duty automation or general-purpose tasks around a shop. The limits are clear: 1/100 HP is far too little for pumps, compressors, or conveyors, and this is a used unit rather than new. If the application is a small motion task and the vintage form factor suits the project, the low listed price makes it an easy pick.
Final recommendation by use case
- Maximum horsepower: The Dayton 15 HP motor is the only motor here that covers 15 HP continuous-duty jobs, with a 254T frame and TEFC enclosure.
- Three-phase duty around 5 HP: The 5 HP 184T severe-duty motor pairs more load capacity with an 184T frame and TEFC enclosure.
- Three-phase duty around 3 HP: The 3 HP 182T motor matches equipment built for a 3 HP, 1800 RPM, 230/460V drive and adds a 1.25 service factor.
- Small single-phase projects: The vintage 1/100 HP motor suits light-duty, 115V applications where a full three-phase unit would be overkill.
