About Electric Motors
When replacing a motor, use the information on your motor’s nameplate to guide your selection.
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Base-Mount AC Motors
To get equipment moving, bolt the base of these motors to any flat surface and connect the shaft to your load. They’re rated for continuous duty, so 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.
Motors with a NEMA frame size have an oversized shaft and high-quality bearings to stand up to heavy and side loads better than even our domestic motors. Densely packed windings and thin laminations ensure the motor stays cool and runs efficiently.
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 automatic overload protection turn off in overload conditions to prevent damage. Once they cool down, they start again automatically.
Overall | Shaft | Insulation | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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 | Class | Max. Temp., °F | Each | |
115/230 Volts AC, Single Phase | |||||||||||||||
NEMA 56 | |||||||||||||||
| 1/4 | 1,740 | 2.8/1.4 | No | Open Dripproof (ODP) | 11 1/8" | 8" | 7 7/8" | 5/8" | 1 7/8" | 3 1/2" | Automatic | F | 311° | 00000000 | 0000000 |
| 1/3 | 1,740 | 3.7/1.9 | No | Open Dripproof (ODP) | 11 3/4" | 8" | 7 7/8" | 5/8" | 1 7/8" | 3 1/2" | Automatic | F | 311° | 0000000 | 000000 |
| 1/2 | 1,740 | 5.1/2.5 | No | Open Dripproof (ODP) | 12 3/8" | 8" | 7 7/8" | 5/8" | 1 7/8" | 3 1/2" | Automatic | F | 311° | 0000000 | 000000 |
| 1/2 | 3,510 | 4.9/2.5 | No | Open Dripproof (ODP) | 11 3/4" | 8" | 7 7/8" | 5/8" | 1 7/8" | 3 1/2" | Automatic | F | 311° | 00000000 | 000000 |
| 3/4 | 3,510 | 6.8/3.4 | No | Open Dripproof (ODP) | 12 3/8" | 8" | 7 7/8" | 5/8" | 1 7/8" | 3 1/2" | Automatic | F | 311° | 0000000 | 000000 |
NEMA 56H | |||||||||||||||
| 3/4 | 1,750 | 6.5/3.3 | No | Open Dripproof (ODP) | 12 3/8" | 8" | 7 7/8" | 5/8" | 1 7/8" | 3 1/2" | Automatic | F | 311° | 0000000 | 000000 |
| 1 1/2 | 3,500 | 12.2/6.1 | No | Open Dripproof (ODP) | 13 3/4" | 8 1/2" | 8 1/4" | 5/8" | 1 7/8" | 3 1/2" | Automatic | F | 311° | 0000000 | 000000 |
NEMA 56/NEMA 56H | |||||||||||||||
| 1 | 1,750 | 8.8/4.4 | No | Open Dripproof (ODP) | 13 3/4" | 8 1/2" | 8 1/4" | 5/8" | 1 7/8" | 3 1/2" | Automatic | F | 311° | 0000000 | 000000 |
| 2 | 1,740 | 16.1/8.0 | No | Open Dripproof (ODP) | 15 3/4" | 8 1/2" | 8 1/4" | 5/8" | 1 7/8" | 3 1/2" | Automatic | F | 311° | 0000000 | 000000 |
NEMA 143T/NEMA 145T | |||||||||||||||
| 1 1/2 | 1,740 | 11.9/5.9 | No | Open Dripproof (ODP) | 15 1/4" | 8 1/2" | 8 1/4" | 7/8" | 2 1/4" | 3 1/2" | Automatic | F | 311° | 0000000 | 000000 |
230/460 Volts AC, Three Phase | |||||||||||||||
NEMA 56 | |||||||||||||||
| 1/3 | 1,735 | 1.1/0.5 | Yes | Open Dripproof (ODP) | 8 7/8" | 9" | 6 3/8" | 5/8" | 1 7/8" | 3 1/2" | __ | F | 311° | 00000000 | 000000 |
| 1/2 | 1,735 | 1.7/0.8 | Yes | Open Dripproof (ODP) | 10 3/8" | 9" | 6 3/8" | 5/8" | 1 7/8" | 3 1/2" | __ | F | 311° | 0000000 | 000000 |
| 1/2 | 3,445 | 1.5/0.7 | Yes | Open Dripproof (ODP) | 8 7/8" | 9" | 6 3/8" | 5/8" | 1 7/8" | 3 1/2" | __ | F | 311° | 00000000 | 000000 |
| 3/4 | 1,730 | 2.4/1.2 | Yes | Open Dripproof (ODP) | 10 3/8" | 9" | 6 3/8" | 5/8" | 1 7/8" | 3 1/2" | __ | F | 311° | 0000000 | 000000 |
| 1 | 1,750 | 2.9/1.5 | Yes | Open Dripproof (ODP) | 11" | 9" | 6 3/8" | 5/8" | 1 7/8" | 3 1/2" | __ | F | 311° | 0000000 | 000000 |
| 1 | 3,470 | 2.7/1.4 | Yes | Open Dripproof (ODP) | 11" | 9" | 6 3/8" | 5/8" | 1 7/8" | 3 1/2" | __ | F | 311° | 0000000 | 000000 |
NEMA 143T | |||||||||||||||
| 1 | 1,750 | 2.9/1.4 | Yes | Open Dripproof (ODP) | 11 1/4" | 9 1/2" | 6 3/4" | 7/8" | 2 1/4" | 3 1/2" | __ | F | 311° | 0000000 | 000000 |
NEMA 143T/NEMA 145T | |||||||||||||||
| 1 1/2 | 1,750 | 4.0/2.0 | Yes | Open Dripproof (ODP) | 12 1/4" | 9 1/2" | 6 3/4" | 7/8" | 2 1/4" | 3 1/2" | __ | F | 311° | 0000000 | 000000 |
| 2 | 1,740 | 5.4/2.7 | Yes | Open Dripproof (ODP) | 12 1/4" | 9 1/2" | 6 3/4" | 7/8" | 2 1/4" | 3 1/2" | __ | F | 311° | 0000000 | 000000 |
| 3 | 3,505 | 7.6/3.8 | Yes | Open Dripproof (ODP) | 12 1/4" | 9 1/2" | 6 3/4" | 7/8" | 2 1/4" | 3 1/2" | __ | F | 311° | 0000000 | 000000 |
NEMA 182T | |||||||||||||||
| 3 | 1,755 | 8.6/4.3 | Yes | Open Dripproof (ODP) | 14 3/8" | 11 1/4" | 10 3/8" | 1 1/8" | 2 3/4" | 4 1/2" | __ | F | 311° | 0000000 | 000000 |
| 5 | 1,740 | 12.4/6.1 | Yes | Open Dripproof (ODP) | 13 3/4" | 12 1/8" | 10 1/2" | 1 1/8" | 2 3/4" | 4 1/2" | __ | F | 311° | 00000000 | 000000 |
| 5 | 3,465 | 11.8/5.9 | Yes | Open Dripproof (ODP) | 12 3/4" | 12 1/8" | 10 1/2" | 1 1/8" | 2 3/4" | 4 1/2" | __ | F | 311° | 0000000 | 000000 |
NEMA 184T | |||||||||||||||
| 7 1/2 | 3,465 | 17.3/8.6 | Yes | Open Dripproof (ODP) | 13 3/4" | 12 1/8" | 10 1/2" | 1 1/8" | 2 3/4" | 4 1/2" | __ | F | 311° | 0000000 | 000000 |
NEMA 182T/NEMA 184T | |||||||||||||||
| 5 | 1,750 | 13.6/6.8 | Yes | Open Dripproof (ODP) | 14 3/8" | 11 1/4" | 10 3/8" | 1 1/8" | 2 3/4" | 4 1/2" | __ | F | 311° | 0000000 | 000000 |
NEMA 213T | |||||||||||||||
| 7 1/2 | 1,750 | 17.9/9.0 | Yes | Open Dripproof (ODP) | 15 3/4" | 14 1/4" | 12 3/8" | 1 3/8" | 3 3/8" | 5 1/4" | __ | F | 311° | 0000000 | 000000 |
| 10 | 3,510 | 23.6/11.8 | Yes | Open Dripproof (ODP) | 15 3/4" | 14 1/4" | 12 3/8" | 1 3/8" | 3 3/8" | 5 1/4" | __ | F | 311° | 0000000 | 000000 |
NEMA 215T | |||||||||||||||
| 10 | 1,750 | 23.5/11.7 | Yes | Open Dripproof (ODP) | 17 1/4" | 14 1/4" | 12 3/8" | 1 3/8" | 3 3/8" | 5 1/4" | __ | F | 311° | 0000000 | 00000000 |
NEMA 254T | |||||||||||||||
| 15 | 1,770 | 35.7/17.9 | Yes | Open Dripproof (ODP) | 20 1/2" | 16 5/8" | 14 3/4" | 1 5/8" | 4" | 6 1/4" | __ | F | 311° | 0000000 | 00000000 |
NEMA 256T | |||||||||||||||
| 20 | 1,770 | 46.6/24.0 | Yes | Open Dripproof (ODP) | 22 1/4" | 16 5/8" | 14 3/4" | 1 5/8" | 4" | 6 1/4" | __ | F | 311° | 0000000 | 00000000 |
NEMA 284T | |||||||||||||||
| 15 | 1,175 | 36.9/18.5 | Yes | Open Dripproof (ODP) | 22 7/8" | 19 3/8" | 16 1/4" | 1 7/8" | 4 5/8" | 7" | __ | F | 311° | 0000000 | 00000000 |
| 25 | 1,765 | 57.5/28.7 | Yes | Open Dripproof (ODP) | 22 7/8" | 19 3/8" | 16 1/4" | 1 7/8" | 4 5/8" | 7" | __ | F | 311° | 0000000 | 00000000 |
NEMA 286T | |||||||||||||||
| 20 | 1,175 | 48.5/24.3 | Yes | Open Dripproof (ODP) | 24 3/8" | 19 3/8" | 16 1/4" | 1 7/8" | 4 5/8" | 7" | __ | F | 311° | 0000000 | 00000000 |
NEMA 324T | |||||||||||||||
| 25 | 1,180 | 60.6/30.3 | Yes | Open Dripproof (ODP) | 26 1/2" | 21 1/2" | 18 3/8" | 2 1/8" | 5 1/4" | 8" | __ | F | 311° | 0000000 | 00000000 |
US-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.
Enclosures that are open 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. Open drip proof (ODP) and open slotted band (OPSB) enclosures only have 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.
Optional drip covers are recommended when your motor will be mounted with the shaft facing down. They attach to the back side of the motor to prevent moisture from pooling on top.
Motors | ||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Overall | Shaft | Drip Covers | ||||||||||||||
| 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 | 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) | 14 1/4" | 10 1/4" | 9" | 7/8" | 2 1/4" | 3 1/2" | Manual | 266° | 00000000 | 000000000 | 00000000 | 0000000 |
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" | 8" | 8 5/8" | 5/8" | 1 7/8" | 3 1/2" | __ | 311° | 00000000 | 000000 | 00000000 | 000000 |
| 1/2 | 1,725 | 4.7/2.4 | No | Open Dripproof (ODP) | 11" | 8" | 8 3/4" | 5/8" | 1 7/8" | 3 1/2" | __ | 311° | 00000000 | 000000 | 00000000 | 000000 |
| 3/4 | 1,750 | 6.5/3.3 | No | Open Dripproof (ODP) | 12 1/4" | 9" | 9" | 5/8" | 1 7/8" | 3 1/2" | __ | 311° | 00000000 | 000000 | 00000000 | 000000 |
| 3/4 | 3,450 | 6.3/3.3 | No | Open Dripproof (ODP) | 11" | 8" | 8 3/4" | 5/8" | 1 7/8" | 3 1/2" | __ | 311° | 00000000 | 000000 | 00000000 | 000000 |
| 1 | 1,750 | 8.4/4.2 | No | Open Dripproof (ODP) | 12 1/4" | 9" | 9" | 5/8" | 1 7/8" | 3 1/2" | __ | 311° | 00000000 | 000000 | 00000000 | 000000 |
| 1 | 3,480 | 7.8/3.9 | No | Open Dripproof (ODP) | 12 1/4" | 9" | 9" | 5/8" | 1 7/8" | 3 1/2" | __ | 311° | 00000000 | 000000 | 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 | 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 | 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 | 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 | 00000000 | 000000 |
NEMA 56—Vibration-Damping Base | ||||||||||||||||
| 1/3 | 1,725 | 6.0/3.0 | No | Open Dripproof (ODP) | 11" | 7" | 8" | 5/8" | 1 7/8" | 3 1/2" | Automatic | 266° | 00000000 | 000000 | 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 | 00000000 | 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 | 00000000 | 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 | 00000000 | 000000 |
| 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 | 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 | 00000000 | 000000 |
NEMA 56/NEMA 56H—Vibration-Damping Base | ||||||||||||||||
| 1 | 1,725 | 13.0/6.5 | No | Open Dripproof (ODP) | 11 1/2" | 7" | 9" | 5/8" | 1 7/8" | 3 1/2" | Automatic | 266° | 0000000 | 000000 | 00000000 | 000000 |
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 | 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 | 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 | 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 | 00000000 | 000000 |
US-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. They bolt directly to gearboxes, pumps, and other machinery. These motors are more compact than base-mount motors and the direct, rigid connection to your equipment keeps 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.
Enclosures that are open 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. Open drip proof (ODP) enclosures have vents. Optional drip covers are recommended when your motor will be mounted with the shaft facing down. They attach to the back side of the motor to prevent moisture from pooling on top.
Motors | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Overall | Shaft | Drip Covers | |||||||||||||
| 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 | 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 | 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 | 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 | 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 | 00000000 | 000000 |
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 | 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 | 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 | 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 | 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 | 00000000 | 000000 |