Regal Grafton Office

We offer thousands of variable-speed control solutions from stock including AC and DC motors and gearmotors. These products are built for rugged commercial and industrial applications where extreme environments, custom designs, and unique solutions are required! Whether you need thousands of motors for OEM applications or a single replacement motor, count on one of our twenty-three stocking warehouses in the USA to get your product there right when you need it.

AC & DC Motors of All Types

  • Adjustable Speed Drives
  • AC & DC Gearmotors
  • Agricultural Duty
  • Brake Motors
  • Custom Motors
  • Definite Purpose Motors
  • Explosion Proof
  • General Purpose Single & Three Phase
  • HVAC – Fan Motors
  • IEC Metric Motors
  • Inverter Duty
  • Permanent Magnet AC & DC
  • Severe Duty and IEEE841
  • Special Voltage
  • Subfractional to 5,000 HP

Leeson Motors

LEESON Brand History

The Beginnings

The LEESON brand originated over 80 years ago with Emil Doerr at St. Louis Electrical Works, later renamed Baldor Electric, with Emil as co-founder. In 1939, Emil's son Lee and two of his brothers founded Doerr Electric. Finally, in 1972, Lee's sons formed LEESON Electric Corporation. Few American companies can trace their roots so deeply, and fewer still can draw upon such a wealth of electric motor manufacturing experience.

A Fast Start

Less than a year after LEESON was organized, in a 5,000 square foot rented facility, the first 48 frame motor was tested. In January 1974, pilot runs of the first 48 frame production began in a slightly larger rented facility. About a year and a half later, in June 1975, production was moved to a Grafton manufacturing plant.

Acquisitions and Alliances

In 1985, LEESON acquired Unison Dynamics, a manufacturer of direct current permanent magnet 48 and 56 frame motors. The advantages of the DC permanent magnet motor, such as adjustable speed using an SCR control or operation from low voltage DC power sources, have further enhanced the LEESON line.

In 1988, LEESON purchased Motronics Corporation, a manufacturer of sub-fractional horsepower AC and DC motors and gearmotors. These industrial-duty sub-fractional products have expanded LEESON's reach into markets such as business machines, data processing peripherals, packaging machinery and medical equipment, among others.

In 1995, LEESON further expanded its ability to say "yes" to customer needs through the acquisition of Gear Systems, Inc., now integrated within LEESON. With the 1997 acquisition of Sandor Corporation, LEESON added the capability for high-volume manufacture of commercial-duty DC sub-fractional motors.


On September 29, 2000, LEESON was acquired by Regal. This merger expanded Regal’s commercial and industrial motor catalog, creating a more expansive portfolio for customers.

Original equipment manufacturers and distributors represent LEESON's primary market segments. Equipment manufacturers build a diverse range of products using LEESON standard and special motors as their prime power. LEESON motors can be found on material handling equipment, pumps, fans and blowers, machine tools, power transmission products, agricultural applications, treadmills, food processing equipment, data processing, medical, textile, packaging, graphic arts, woodworking, and a host of other industrial and commercial products.

Our distributor business, which primarily involves stock motors, gearmotors and drives, provides a valuable marketing link to reach the end-user, small OEM and replacement markets. Our distributors include motor service centers, power transmission and bearing houses, and industrial supply houses. A growing distributor network is vital to our continued success, and we are continually searching for new business partners in this area.

Continuing Investments

Product diversification is an important ongoing activity within Regal and the LEESON brand. Equally important is manufacturing innovation. To maintain our leadership position as a quality, cost-effective manufacturer, we have made many changes in our plants over the past years. These include highly automated computer aided machine tools and winding equipment, revisions to the manufacturing process to minimize material handling, and deployment of manufacturing space to achieve higher efficiencies and productivity for our increasingly diverse product line.

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Commercial Systems|Industrial Systems