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About Leeson Electric Motors

Company Name: Leeson

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Forum: Leeson Forum


Leeson Electric Company was developed by Lee Doerr's two sons. Over the years, in the electric motor industry, Leeson has become a well known name. Leeson manufactures motors of all sizes; some are as small as to be sub fractional and others are hundreds of horsepower strong.

Founded in 1972, Leeson began manufacturing electric motors in 1974. They acquired Unison Dynamics and Motronics Corporation in 1985 and 1988. In 2000, Leeson was acquired by Regal-Beloit who had bought Lincoln Electric Corp.'s motor division in 1999. By 2006 Regal had transferred Lincoln to Leeson.

Leeson's products are used in many industries and applications in many and varied marketplaces. Motors that Leeson manufactures are found all around the world. They can be found in the paper and bulk material handling industry as well as in the textile and food industries. Headquartered in Grafton, Wisconsin, Leeson has two manufacturing plants in the United States; it is from here that Leeson services its customers all around the country to meet their ever-growing electric motor demands.

Leeson offers both alternating current (AC) and direct current (DC) motors and there is always stock available for immediate shipment. Their standards are high and they are well known for their excellent customer service.

AC Single Phase Motors

General Purpose Single Phase Motor – these include both ODP and TEFC enclosures. Features include: durable rolled steel frame, class B insulation, high quality ball bearings, some 56 frame motors have a 56, 56H, 143T and 145T combination base with 12 mounting holes for flexible installation, WL recognized Component Listing and CSA approval.

The ODP  models are used where water and dust exposure is moderate. Ideally suited for pumps, blowers, fans, compressors, and other belt-driven applications.

The TEFC models are used where water, dust and corrosives are present. These motors are suited for pumps, conveyors, machine tools, fans, blowers and other belt-driven applications.

Farm AG Motors - These motors are designed for use in the agricultural industry and are made for tough applications found here. These types of motors are used for crop drying, grain stirring, auger drive, milk transfer, catfish ponds and more.

AC Three-Phase Electric Motors

General Purpose Three-Phase Motor – These motors are designed to both EPACT and Premium energy-efficiency mandates. These motors meet the energy-efficiency requirements of the United States and Canada for general purpose industrial motors which deliver new levels of starting torque, reliability and overload capability. Both ODP and Enclosed designs in frame construction are available. These can be rolled steel, aluminum or cast iron.

Other AC three-phase electric motors include:

  • Explosion Proof

  • Compressor Duty

  • Brake Motors

  • IEC Metri

  • Fan and Blower

  • Washdown Duty 

  • IEEE 841 TEFC Cast Iron

  • Inverter Rated

  • Premium Efficient Wattsaver

  • and more. 

DC Electric Motors

SCR Rated / General Purpose high voltage permanent magnet DC motors are used with an SCR controller where applications require adjustable speed and constant torque. Applications requiring dynamic braking and adjustable speed are where you find general purpose DC motors.

Low Voltage Motors suitable for applications having battery or solar powered operations. These motors are high torque, with continous duty designs.

Explosion Proof Motors ideally suited for hazardous environments. Anyplace where there are explosive gases or materials is where you will find these motors. 

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