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
Replace old base-mount motors to keep your equipment moving. Motors are rated for continuous duty and mount at any angle. You can wire for clockwise or counterclockwise rotation; instructions are included.
To use a motor with a variable frequency drive (AC motor speed control), choose a three-phase motor that’s inverter rated.
Motors with a welded base have a base that's welded to the enclosure. Motors with a vibration-damping base have rubber rings between the base and enclosure to minimize vibration.
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.
O'all | 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 | |
115/208-230 Volts AC, Single Phase | |||||||||||||||
NEMA 145T—Welded Base (Keyed Shaft) | |||||||||||||||
| 1 1/2 | 1,725 | 21/9.6-10.5 | No | Open Dripproof (ODP) | 13" | 10 1/4" | 9" | 7/8" | 2 1/4" | 3 1/2" | Manual | B | 266° | 00000000 | 000000000 |
115/230 Volts AC, Single Phase | |||||||||||||||
NEMA 48—Welded Base (D-Profile Shaft) | |||||||||||||||
| 1/4 | 1,725 | 2.6/1.3 | No | Open Dripproof (ODP) | 10" | 8" | 8 1/4" | 1/2" | 1 1/2" | 3" | __ | F | 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" | __ | F | 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" | __ | B | 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" | __ | F | 311° | 00000000 | 000000 |
NEMA 56—Welded Base (Keyed Shaft) | |||||||||||||||
| 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" | __ | F | 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" | __ | F | 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" | __ | F | 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" | __ | F | 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" | __ | F | 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" | __ | F | 311° | 00000000 | 000000 |
NEMA 56H—Welded Base (Keyed Shaft) | |||||||||||||||
| 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" | __ | F | 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" | __ | F | 311° | 00000000 | 000000 |
NEMA 56—Vibration-Damping Base (Keyed Shaft) | |||||||||||||||
| 1/3 | 1,725 | 6/3 | No | Open Dripproof (ODP) | 11" | 6 3/4" | 8" | 5/8" | 1 7/8" | 3 1/2" | Automatic | B | 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 | B | 266° | 0000000 | 000000 |
| 3/4 | 1,725 | 10/5 | No | Open Dripproof (ODP) | 12 1/2" | 7" | 8" | 5/8" | 1 7/8" | 3 1/2" | Automatic | B | 266° | 0000000 | 000000 |
NEMA 56/NEMA 56H—Welded Base (Keyed Shaft) | |||||||||||||||
| 2 | 3,470 | 15.6/7.8 | No | Open Dripproof (ODP) | 14" | 9" | 9" | 5/8" | 1 7/8" | 3 1/2" | __ | F | 311° | 00000000 | 000000 |
NEMA 56/NEMA 56H—Vibration-Damping Base (Keyed Shaft) | |||||||||||||||
| 1 | 1,725 | 13/6.5 | No | Open Dripproof (ODP) | 11 1/2" | 6 3/4" | 9 1/4" | 5/8" | 1 7/8" | 3 1/2" | Automatic | B | 266° | 0000000 | 000000 |
208-230 Volts AC, Single Phase | |||||||||||||||
NEMA 184T—Welded Base (Keyed Shaft) | |||||||||||||||
| 3 | 1,750 | 12.5-11.2 | No | Open Dripproof (ODP) | 16 1/2" | 11 1/4" | 11 1/4" | 1 1/8" | 2 3/4" | 4 1/2" | __ | F | 311° | 00000000 | 00000000 |
| 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" | __ | F | 311° | 00000000 | 00000000 |
208-230/460 Volts AC, Three Phase | |||||||||||||||
NEMA 56—Welded Base (Keyed Shaft) | |||||||||||||||
| 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" | __ | F | 311° | 00000000 | 000000 |
| 3/4 | 1,730 | 2.1-2/1 | No | Open Dripproof (ODP) | 11 1/4" | 9" | 7" | 5/8" | 1 7/8" | 3 1/2" | __ | F | 311° | 00000000 | 000000 |
| 1 | 1,750 | 3-2.9/1.5 | No | Open Dripproof (ODP) | 11 1/4" | 9" | 7" | 5/8" | 1 7/8" | 3 1/2" | __ | F | 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" | __ | F | 311° | 00000000 | 000000 |
NEMA 143T—Welded Base (Keyed Shaft) | |||||||||||||||
| 1 | 1,760 | 3.1-3/1.5 | Yes | Open Dripproof (ODP) | 11 1/4" | 9" | 7" | 7/8" | 2 1/4" | 3 1/2" | __ | F | 311° | 00000000 | 000000 |
NEMA 145T—Welded Base (Keyed Shaft) | |||||||||||||||
| 1 1/2 | 1,755 | 4.5-4.4/2.2 | Yes | Open Dripproof (ODP) | 11 3/4" | 9" | 7" | 7/8" | 2 1/4" | 3 1/2" | __ | F | 311° | 00000000 | 000000 |
| 2 | 1,750 | 5.8-5.8/2.9 | Yes | Open Dripproof (ODP) | 12 1/4" | 9" | 7" | 7/8" | 2 1/4" | 3 1/2" | __ | F | 311° | 00000000 | 000000 |
NEMA 182T—Welded Base (Keyed Shaft) | |||||||||||||||
| 3 | 1,760 | 8.9-8.8/4.4 | Yes | Open Dripproof (ODP) | 15" | 11 1/4" | 8 1/2" | 1 1/8" | 2 3/4" | 4 1/2" | Automatic | F | 311° | 00000000 | 00000000 |
NEMA 184T—Welded Base (Keyed Shaft) | |||||||||||||||
| 5 | 1,750 | 14-13.2/6.6 | Yes | Open Dripproof (ODP) | 16 1/2" | 11 1/4" | 9" | 1 1/8" | 2 3/4" | 4 1/2" | Automatic | F | 311° | 00000000 | 00000000 |
230/460 Volts AC, Three Phase | |||||||||||||||
NEMA 145T—Welded Base (Keyed Shaft) | |||||||||||||||
| 3 | 3,450 | 7.6/3.8 | Yes | Open Dripproof (ODP) | 13" | 9" | 7" | 7/8" | 2 1/4" | 3 1/2" | __ | F | 311° | 00000000 | 000000 |
Face-Mount AC Motors
Also known as C-face motors, these bolt directly to your equipment at any angle. They're rated for continuous duty and have a keyed shaft that comes with key stock. You can wire for clockwise or counterclockwise rotation; instructions are included.
To use a motor with a variable frequency drive (AC motor speed control), choose a three-phase motor that’s inverter rated.
For technical drawings and 3-D models, click on a part number.
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 | Class | 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" | B | 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" | B | 266° | 00000000 | 000000 |
| 1/2 | 1,725 | 4.7/2.35 | No | Open Dripproof (ODP) | 12 3/4" | 8 1/4" | 8 1/4" | 5/8" | 1 7/8" | 3" | B | 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" | B | 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" | F | 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" | B | 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" | B | 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" | B | 266° | 00000000 | 000000 |
| 3/4 | 1,730 | 2.28/1.14 | No | Open Dripproof (ODP) | 12 1/4" | 9 1/4" | 7" | 5/8" | 1 7/8" | 3 3/8" | F | 311° | 00000000 | 000000 |
| 1 | 1,750 | 3.26/1.63 | No | Open Dripproof (ODP) | 12 1/4" | 9 1/4" | 7" | 5/8" | 1 7/8" | 3 3/8" | F | 311° | 00000000 | 000000 |