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New Surplus and Reconditioned Electric Motors and Equipment

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AC motors are the most common type of electric motor. 1 Phase motors are used in residential and light commercial applications. 3 Phase motors are used in commercial and industrial applications.


AC motors are used to convert electrical power to mechanical power. Most machinery has an electric motor directly powering it or an electric motor running a hydraulic pump to create hydraulic pressure, or an electric motor running an air compressor to create compressed air.


Common applications for electric motors include Pumps, Fans, Compressors, Conveyors, Machine Tools, Steel Making Lines, Plastic Extruders, Rubber Mixers, Mixers, Paper Making Machinery, etc.

Squirrel Cage Motors are a subdivision of induction motors. Squirrel cage motors channel electromagnetism to produce motion. The reason they are referred to as squirrel cage motors is the shape of their rotor.


Brake Motors are electric motors with a brake attached to the motor. When the brake is energized, the brake is not engaged. As soon as power to the motor is off, the brake causes the motor to come to an instant stop. 


Design D Motors have high starting torque and higher than typical slip characteristics. Slip is the difference between the synchronous speed of the motor and the actual running speed. Design D motors are rated 5-8% Slip or 8-13% Slip. Design D motors are commonly used in punch press and oil pump jack applications. 


Gear Motors are gear reducers with an electric motor mounted directly to them. They reduce the speed of the motor, through the gearbox, to the rate the application requires. Gear motors come in parallel and right-angle configurations.


Multi-Speed Motors are AC motors that utilize one winding that can be connected for two different speeds. Multi-Speed motors can also have two separate windings making it possible to have 3 or 4 rates. Multi-Speed motors are commonly used in a mixer, crane, and cooling tower pump applications. 


Slip Ring Motors are motors that have a winding in the motor's stator, like regular motors, and a winding on the rotor, the rotating part of the motor. Slip Ring motors were used in applications where the application required varying the speed of the motor. Slip Ring motors are used on conveyors, cranes, and mixers. 


Synchronous Motors are designed to run exactly at their Synchronous speed with no slip. Synchronous motors have AC windings in the stator and DC windings in the rotor, the rotating part of the motor. Synchronous motors typical are 500 HP and above.


Variable Speed Motors are AC motors that can operate within a range of different speeds. The most common type of Variable Speed Motors has a combination of an AC motor and an Eddy Current (DC) Clutch. Variable Speed motors are used on punch presses, air handling equipment, mixers, etc.


Vertical Motors are motors that are vertically oriented and are used in all types of pump applications. There are two primary types of vertical motors: Vertical Hollowshaft and Vertical Solid Shaft. Vertical motors are often configured with non-reversing ratchets, allowing the motor to be operated in one direction.

Squirrel Cage Motors

HP:

RPM:

Frame:

Enclosure:

Make:

Volts:

Condition:

900
3600
3510SPCL
WPIISB
Teco Westinghouse
2300/4000
SURPLUS

Brake Motors

HP:

RPM:

Frame:

Enclosure:

Make:

Volts:

Condition:

7.5
1800
213T
TEFCBB EXP
Westinghouse
230/460
SURPLUS

Design D Motors

HP:

RPM:

Frame:

Enclosure:

Make:

Volts:

Condition:

75
1800
L505
TEFCBB
Delco
230/460
USED

Gear Motors

HP:

RPM:

Frame:

Enclosure:

Make:

Volts:

Condition:

10
72
97
TENVBB
General Electric
230
USED

Multi-Speed Motors

HP:

RPM:

Frame:

Enclosure:

Make:

Volts:

Condition:

75
1800
365T
TEFCBB
Toshiba
575
USED

Slip Ring Motors

HP:

RPM:

Frame:

Enclosure:

Make:

Volts:

Condition:

800
900
WR8040
WPIBB
Reliance
4000
USED

Synchronous Motors

HP:

RPM:

Frame:

Enclosure:

Make:

Volts:

Condition:

900
900
8309Z
DPSB
General Electric
2300
USED

Variable Speed Motors

HP:

RPM:

Frame:

Enclosure:

Make:

Volts:

Condition:

75
1800
365TDZ-360
TEFCBB
Eaton
230/460
FRAME

Vertical Motors

HP:

RPM:

Frame:

Enclosure:

Make:

Volts:

Condition:

900
1200
589UP
WPIIBB
Siemens-Allis
2300

Romanoff Industries sells AC Electric Motors from all major manufacturers:


ABB Electric Motors, Allis Chalmers Electric Motors, AO Smith Electric Motors, Asea Electric Motors, Baldor Electric Motors, Baldor/Reliance Electric Motors, Brook Electric Motors, Brook Crompton Electric Motors, Brook Hansen Electric Motors, BBC Electric Motors, Century Electric Motors, Elektrim Electric Motors, General Electric Motors, Hico Electric Motors, Howell Electric Motors, Hyundai Electric Motors, Leeson Electric Motors, Louis-Allis Electric Motors, Magnetek Electric Motors, Marathon Electric Motors, North American Electric Motors, Reliance Electric Motors, Siemens Electric Motors, Siemens-Allis Electric Motors, Tatung Electric Motors, Teco Electric Motors, Teco/Westinghouse Electric Motors, Toshiba Electric Motors, US Electric Motors, Weg Electric Motors, Westinghouse Electric Motors, Worldwide Electric Motors


Common Voltage for AC Motors include 200 Volt, 208 Volt, 220 Volt, 230 Volt, 240 Volt, 440 Volt, 460 Volt, 480 Volt, 575 Volt, 2300 Volt, 4000 Volt, 4160 Volt, 6600 Volt, and 13,200 Volt.


When Voltage is applied to and electric motor, at the rated Hertz or Cycles, the motor runs at a fixed RPM or Revolutions per Minute. At 3 Phase, 60 Cycles, the common RPMs are: 3600 RPM (2 Pole), 1800 RPM (4 Pole), 1200 RPM (6 Pole), 900 RPM (8 Pole), 720 RPM (10 Pole), 600 RPM (12 Pole), 514 RPM (14 Pole), 450 RPM (16 Pole), 400 RPM (18 Pole), 360 RPM (20 Pole), 300 RPM (24 Pole), 257 RPM (28 Pole), 200 (36 Pole) RPM, and 180 RPM (40 Pole).


With the introduction of variable frequency drives, now the RPM of AC motors can be changed by altering the Cycles and Voltage applied to the motor.


AC Electric motors for sale come in a variety of Enclosure Types. The enclosure of the motor determines how well the windings of the motor are protected from the environment the motor operates.


Romanoff Industries sells AC motors in the following enclosure types: Drip Proof (Open), TEFC (Totally Enclosed Fan Cooled), WPI (Weather Protected Type I), WPII (Weather Protected Type II), TEAO (Totally Enclosed Air Over), TEAAC (Totally Enclosed Air to Air Cooled or Tube Cooled), TEBC (Totally Enclosed Blower Cooled).


AC electric motors come with two different types of bearings. Ball Bearings (Anti-Friction) are usually lubricated with grease but in some cases they are lubricated with oil. Sleeve Bearings (Friction) are lubricated with Oil. Some motors in high thrust applications have a sleeve bearing in the drive end and a ball bearing in the opposite drive end.


AC electric motors have leads(wires) that power(voltage) is applied to. AC motors for sale typically have 3, 6, 9, or 12 leads. 3 lead motors are only suitable for one voltage. 6 leads motors are either suitable for two different voltages or can be utilized with specific types of starters. A dual voltage motor has 6 leads numbered 1-6. A single voltage motor with leads numbered 1-6 can be started across the line or with a Wye - Delta Starter. A single voltage motor with leads numbered 1,2,3,7,8,9 can be started across the line or with a Part Winding Starter. A 12 lead motor with leads numbered 1-12 is either a dual voltage motor or a single voltage motor that can be used with a variety of starters. Motors that have leads with the same numbers Example: 1,1 2,2 3,3 are set up that way to reduce the size of the lead wire when the motor is being wound.