About Electric Motors
When replacing a motor, use the information on your motor’s nameplate to guide your selection.
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U.S.-Made Base-Mount AC Motors
Wound, wired, and assembled in the U.S. These base-mount motors are manufactured for durability and include high-quality bearings, so they hold up to occasional overload conditions and spikes in torque. Rated for continuous duty, they’re often used with equipment that requires constant power, such as fans, pumps, and conveyors. Bolt the base of these motors to any flat surface and connect the shaft to your load.
When pairing with a variable frequency drive (AC motor speed control), choose a three-phase motor that’s inverter rated.
Motors with a vibration-damping base have rubber rings between the base and enclosure to minimize vibration.
Open drip proof (ODP) enclosures have vents that let air flow over the motor, which keeps it cool and helps it run efficiently. Use them in clean, dry environments—the enclosure blocks drips and debris that fall from above, but dust and moisture can pass through the vents.
Motors with overload protection turn off in overload conditions to prevent motor damage. Manual overload protection must be reset manually to start the motor after it cools. Automatic overload protection starts the motor automatically after it cools.
For technical drawings and 3-D models, click on a part number.
Overall | Shaft | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Power, hp | Max. Speed, rpm | Full Load Current, A | Inverter Rated | Motor Enclosure Type | Lg. | Wd. | Ht. | Dia. | Lg. | Center to Base | Overload Protection Type | Insulation Max. Temp., °F | Each | |
115/208/230 Volts AC, Single Phase | ||||||||||||||
NEMA 145T—Welded Base | ||||||||||||||
| 1 1/2 | 1,725 | 21.0/9.6/10.5 | No | Open Dripproof (ODP) | 13" | 10 1/4" | 9" | 7/8" | 2 1/4" | 3 1/2" | Manual | 266° | 00000000 | 000000000 |
115/230 Volts AC, Single Phase | ||||||||||||||
NEMA 56—Welded Base | ||||||||||||||
| 1/3 | 1,740 | 3.4/1.7 | No | Open Dripproof (ODP) | 10 1/8" | 9" | 8 5/8" | 5/8" | 1 7/8" | 3 1/2" | __ | 311° | 00000000 | 000000 |
| 1/2 | 1,725 | 4.7/2.4 | No | Open Dripproof (ODP) | 11" | 8 1/2" | 8 3/4" | 5/8" | 1 7/8" | 3 1/2" | __ | 311° | 00000000 | 000000 |
| 3/4 | 1,750 | 6.5/3.3 | No | Open Dripproof (ODP) | 12 1/4" | 9" | 9 1/4" | 5/8" | 1 7/8" | 3 1/2" | __ | 311° | 00000000 | 000000 |
| 3/4 | 3,450 | 6.3/3.3 | No | Open Dripproof (ODP) | 11" | 8 1/2" | 8 3/4" | 5/8" | 1 7/8" | 3 1/2" | __ | 311° | 00000000 | 000000 |
| 1 | 1,750 | 8.4/4.2 | No | Open Dripproof (ODP) | 12 1/4" | 9" | 9 1/4" | 5/8" | 1 7/8" | 3 1/2" | __ | 311° | 00000000 | 000000 |
| 1 | 3,480 | 7.8/3.9 | No | Open Dripproof (ODP) | 12 1/4" | 9" | 9 1/4" | 5/8" | 1 7/8" | 3 1/2" | __ | 311° | 00000000 | 000000 |
NEMA 48—Welded Base | ||||||||||||||
| 1/4 | 1,725 | 2.6/1.3 | No | Open Dripproof (ODP) | 10" | 8" | 8 1/4" | 1/2" | 1 1/2" | 3" | __ | 311° | 00000000 | 000000 |
| 1/3 | 1,740 | 3.4/1.7 | No | Open Dripproof (ODP) | 9 3/4" | 9" | 8 1/8" | 1/2" | 1 1/2" | 3" | __ | 311° | 00000000 | 000000 |
| 1/2 | 1,725 | 4.7/2.4 | No | Open Dripproof (ODP) | 10 3/4" | 8" | 8 1/4" | 1/2" | 1 1/2" | 3" | __ | 266° | 00000000 | 000000 |
| 1/2 | 3,450 | 4.9/2.5 | No | Open Dripproof (ODP) | 10" | 8" | 8 1/4" | 1/2" | 1 1/2" | 3" | __ | 311° | 00000000 | 000000 |
NEMA 56—Vibration-Damping Base | ||||||||||||||
| 1/3 | 1,725 | 6.0/3.0 | No | Open Dripproof (ODP) | 11" | 6 3/4" | 8" | 5/8" | 1 7/8" | 3 1/2" | Automatic | 266° | 00000000 | 000000 |
| 1/2 | 1,725 | 8.4/4.2 | No | Open Dripproof (ODP) | 11 3/4" | 7" | 8" | 5/8" | 1 7/8" | 3 1/2" | Automatic | 266° | 0000000 | 000000 |
| 3/4 | 1,725 | 10.0/5.0 | No | Open Dripproof (ODP) | 12 1/2" | 7" | 8" | 5/8" | 1 7/8" | 3 1/2" | Automatic | 266° | 0000000 | 000000 |
NEMA 56H—Welded Base | ||||||||||||||
| 1 1/2 | 1,725 | 12.4/6.2 | No | Open Dripproof (ODP) | 14" | 9 3/4" | 9" | 5/8" | 1 7/8" | 3 1/2" | __ | 311° | 00000000 | 00000000 |
| 1 1/2 | 3,480 | 11.8/5.9 | No | Open Dripproof (ODP) | 12 3/4" | 9" | 9" | 5/8" | 1 7/8" | 3 1/2" | __ | 311° | 00000000 | 000000 |
NEMA 56/NEMA 56H—Welded Base | ||||||||||||||
| 2 | 3,470 | 15.6/7.8 | No | Open Dripproof (ODP) | 14" | 9" | 9" | 5/8" | 1 7/8" | 3 1/2" | __ | 311° | 00000000 | 000000 |
NEMA 56/NEMA 56H—Vibration-Damping Base | ||||||||||||||
| 1 | 1,725 | 13.0/6.5 | No | Open Dripproof (ODP) | 11 1/2" | 6 3/4" | 9 1/4" | 5/8" | 1 7/8" | 3 1/2" | Automatic | 266° | 0000000 | 000000 |
208/230 Volts AC, Single Phase | ||||||||||||||
NEMA 184T—Welded Base | ||||||||||||||
| 5 | 1,725 | 22.7/20.6 | No | Open Dripproof (ODP) | 16 3/4" | 11 1/4" | 11 1/4" | 1 1/8" | 2 3/4" | 4 1/2" | __ | 311° | 00000000 | 00000000 |
208/230/460 Volts AC, Three Phase | ||||||||||||||
NEMA 56—Welded Base | ||||||||||||||
| 1/2 | 1,725 | 2.1/1.6/0.8 | No | Open Dripproof (ODP) | 11 3/4" | 8 1/2" | 6 1/2" | 5/8" | 1 7/8" | 3 1/2" | __ | 311° | 00000000 | 000000 |
| 3/4 | 1,730 | 2.1/2.0/1.0 | Yes | Open Dripproof (ODP) | 11 1/4" | 9" | 7" | 5/8" | 1 7/8" | 3 1/2" | __ | 311° | 00000000 | 000000 |
| 1 | 1,750 | 3.0/2.9/1.5 | Yes | Open Dripproof (ODP) | 11 1/4" | 9" | 7" | 5/8" | 1 7/8" | 3 1/2" | __ | 311° | 00000000 | 000000 |
| 1 | 3,450 | 4.2/3.2/1.6 | No | Open Dripproof (ODP) | 11" | 8 1/2" | 6 1/2" | 5/8" | 1 7/8" | 3 1/2" | __ | 311° | 00000000 | 000000 |
230 Volts AC, Single Phase | ||||||||||||||
NEMA 184T—Welded Base | ||||||||||||||
| 3 | 1,750 | 11.2 | No | Open Dripproof (ODP) | 16 1/2" | 11 1/4" | 11 1/4" | 1 1/8" | 2 3/4" | 4 1/2" | __ | 311° | 00000000 | 00000000 |
230/460 Volts AC, Three Phase | ||||||||||||||
NEMA 143T—Welded Base | ||||||||||||||
| 1 | 1,760 | 3.0/1.5 | Yes | Open Dripproof (ODP) | 11 1/4" | 9" | 7" | 7/8" | 2 1/4" | 3 1/2" | __ | 311° | 00000000 | 000000 |
NEMA 145T—Welded Base | ||||||||||||||
| 1 1/2 | 1,755 | 4.4/2.2 | Yes | Open Dripproof (ODP) | 11 3/4" | 9" | 7" | 7/8" | 2 1/4" | 3 1/2" | __ | 311° | 00000000 | 000000 |
| 2 | 1,750 | 5.8/2.9 | Yes | Open Dripproof (ODP) | 12 1/4" | 9" | 7" | 7/8" | 2 1/4" | 3 1/2" | __ | 311° | 00000000 | 000000 |
| 3 | 3,450 | 7.6/3.8 | Yes | Open Dripproof (ODP) | 13" | 9" | 7" | 7/8" | 2 1/4" | 3 1/2" | __ | 311° | 00000000 | 000000 |
NEMA 182T—Welded Base | ||||||||||||||
| 3 | 1,760 | 8.8/4.4 | Yes | Open Dripproof (ODP) | 15" | 11 1/4" | 8 1/2" | 1 1/8" | 2 3/4" | 4 1/2" | Automatic | 311° | 00000000 | 00000000 |
NEMA 184T—Welded Base | ||||||||||||||
| 5 | 1,750 | 13.2/6.6 | Yes | Open Dripproof (ODP) | 16 1/2" | 11 1/4" | 9" | 1 1/8" | 2 3/4" | 4 1/2" | Automatic | 311° | 00000000 | 00000000 |
U.S.-Made Face-Mount AC Motors
Wound, wired, and assembled in the U.S. These motors are manufactured for durability and include high-quality bearings, so they hold up to occasional overload conditions and spikes in torque. Also known as C-face motors, they bolt directly to gearboxes, pumps, and other machinery. They’re more compact than base-mount motors and the direct, rigid connection to your equipment helps keep them aligned. Rated for continuous duty, they’re often used with equipment that requires constant power, like fans, pumps, and conveyors.
When pairing with a variable frequency drive (AC motor speed control), choose a three-phase motor that’s inverter rated.
Open drip proof (ODP) enclosures have vents that let air flow over the motor, which keeps it cool and helps it run efficiently. Use them in clean, dry environments—the enclosure blocks drips and debris that fall from above, but dust and moisture can pass through the vents.
For technical drawings and 3-D models, click on a part number.
Overall | Shaft | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Power, hp | Max. Speed, rpm | Full Load Current, A | Inverter Rated | Motor Enclosure Type | Lg. | Wd. | Ht. | Dia. | Lg. | Center to Base | Insulation Max. Temp., °F | Each | |
115/230 Volts AC, Single Phase | |||||||||||||
NEMA 56C | |||||||||||||
| 1/4 | 1,725 | 2.6/1.3 | No | Open Dripproof (ODP) | 12" | 8 1/4" | 8 1/4" | 5/8" | 1 7/8" | 3" | 266° | 00000000 | 0000000 |
| 1/3 | 1,740 | 3.4/1.7 | No | Open Dripproof (ODP) | 12" | 8 1/4" | 8 1/4" | 5/8" | 1 7/8" | 3" | 266° | 00000000 | 000000 |
| 1/2 | 1,725 | 4.7/2.3 | No | Open Dripproof (ODP) | 12 3/4" | 8 1/4" | 8 1/4" | 5/8" | 1 7/8" | 3" | 266° | 00000000 | 000000 |
| 1/2 | 3,450 | 4.9/2.5 | No | Open Dripproof (ODP) | 12" | 8 1/4" | 8 1/4" | 5/8" | 1 7/8" | 3" | 266° | 00000000 | 000000 |
| 1 | 1,750 | 8.8/4.4 | No | Open Dripproof (ODP) | 13 1/4" | 9 1/4" | 9" | 5/8" | 1 7/8" | 3 3/8" | 311° | 00000000 | 00000000 |
208/230/460 Volts AC, Three Phase | |||||||||||||
NEMA 56C | |||||||||||||
| 1/2 | 1,725 | 1.7/1.6/0.8 | No | Open Dripproof (ODP) | 12 3/4" | 8 1/4" | 6 1/4" | 5/8" | 1 7/8" | 3" | 266° | 00000000 | 000000 |
230/460 Volts AC, Three Phase | |||||||||||||
NEMA 56C | |||||||||||||
| 1/3 | 1,725 | 1.4/0.7 | No | Open Dripproof (ODP) | 11 1/4" | 8 1/4" | 6 1/4" | 5/8" | 1 7/8" | 3" | 266° | 00000000 | 000000 |
| 1/2 | 3,450 | 1.6/0.8 | No | Open Dripproof (ODP) | 11 1/4" | 8 1/4" | 6 1/4" | 5/8" | 1 7/8" | 3" | 266° | 00000000 | 000000 |
| 3/4 | 1,730 | 2.2/1.1 | No | Open Dripproof (ODP) | 12 1/4" | 9 1/4" | 7" | 5/8" | 1 7/8" | 3 3/8" | 311° | 00000000 | 000000 |
| 1 | 1,750 | 3.2/1.6 | No | Open Dripproof (ODP) | 12 1/4" | 9 1/4" | 7" | 5/8" | 1 7/8" | 3 3/8" | 311° | 00000000 | 000000 |