Mon - Fri: 8AM - 4:30PM (CST)
Emergency Service 24/7

We Know Electric Motors Inside & Out
At Lewis Motor Repair we have been setting the standard for electric motor repair since 1973.

Our repair services at Lewis Motor Repair are all encompassing and include testing, repair, and rewinds for small, large and extra-large AC and DC electric motors and mechanical systems. From shop repairs to on-site apparatus servicing, we are capable of executing your repair needs in a professional and cost-efficient manner 24 hours a day, seven days a week (24/7).

Shop Capabilities
Fully Equipped Electric Motor Rewind and Repair Facilities.

  • Up to 2500 HP AC & DC
  • DC Motor Repair
  • DC Armature Rewinding
  • Field Rewind
  • Hermetic Rewinding
  • Welder Repair
  • Pump & Gear Box Repair
  • DC Brush Holder Refurbishing
  • Slip Ring Rebuilding
  • Electronic PC Board Repair
  • AC & DC Testing to 5000 Volts
  • Surge Comparison Testing
  • MEG-OHM Testing
  • AC & DC Hi-Pot Testing
  • Armature Bar to Bar Testing
  • Rotor-Bar Testing & Repair
  • Dynamic Balancing
  • Motor Core Loss Testing & Repair
  • Generator Load Testing
  • Vibration/Alignment Analyzing
  • Electro-Magnet Coil Testing
  • AC/DC Coil Testing & Winding
  • Tachometer Testing & Repair
  • Medium Voltage Form Coil Rewinding
  • Spray Welding Metalizing Service
  • Spindle & Machine Tool Repair
  • CNC Coil Winding Machine
  • AC Induction Motors - Squirrel Cage & Wound Rotor
  • AC Synchronous Motors - Brushless & Slip Ring
  • AC Generators - Hdyro, Wind Turbine, Steam Turbine, Diesel Driven, Single, & 2 Bearing
  • DC Motors - Permanent Magnet, Series, Shunt, Compound
  • Specialty Motors - Vertical, Hermetic, Nuclear, Explosion-Proof, Servo
  • Voltage Ratings from Low Voltage to 4,160 VAC / 1,000 VDC
  • HP Ratings from Fractional to 5,000+ HP

Dedicated Small Motor Repair
Fully Equipped Electric Motor Rewind and Repair Facilities.

  • NEMA Motors
  • IEC Motors
  • Gear Motors
  • Servo Motors
  • Spindle Motors
  • Low-Voltage DC Motors
  • Small Definitive Purpose, Non-Stock Motors
  • Industrial & Commercial Power Tool Repair
  • Portable Generator Repair

Pump Repair

Markets served include municipal, industrial, commercial, and residential.

  • Axial Flow Pump Repair
  • Circulation Pump Repair
  • Cutter / Chopper Pumps
  • Fire Pump Repair
  • HVAC Pump Repair
  • Submersible Mixer Pumps
  • Booster Pump Repair
  • Grinder Pump Repair
  • Multi-Stage Pump Repair
  • Split Case Pump Repair
  • Submersible Pump Repair
  • Water Feature Pumps
  • Aeration Units

Gearbox Repair

All Industries utilize gearboxes in a variety of applications. Some industries, such as Plastics, power generation, distillation, cement and aggregate, paper mills, and the petrochemical industry, require high-torque gearboxes, which can provide continuous as well as noise-free performance. Grain, food process, beverage, as well as other industries all utilize similar type gearboxes. The durability and tolerance levels have to be specifically designed by keeping in mind the performance desired.

Types of Gearboxes:

  • Bevel
  • Helical
  • Offset
  • Planetary
  • Cyclo
  • Worm

Specialized Services

  • In House Dynamic Balancing - 4.5 ton capability
  • Custom Control Panel Fabrication
  • Electronic, Custom Fan & Custom Roller Balancing
  • Electro-Magnet Reconditioning & Rewinding
  • Custom DC Brush Ring & Brush Holder Parts Manufacturing
  • Medium Voltage Formed Coil Rewinding
  • Frequency Generator/Converter Rebuilding & MG Set Repair
  • Custom-Built Electric Motor Capabilities

Motor Modifications

Our in-shop MOD Center Program allows us to MOD Stock motors to meet your modified motor needs in a few days or less. With extensive stock motor offerings and 20+ unique motor modification programs available, we can "customize" a motor to meet your application needs.

Shaft Grounding Systems

Variable frequency drives on AC and DC motors can induce harmful electrical voltages on the motor shaft. Once these voltages exceed the resistance of the bearing lubricant, they discharge through the motor's bearings causing severe pitting, fluting damage, bearing etching, and excessive bearing noise that will eventually cause bearing failure. Lewis Motor Repair can install shaft grounding systems to eliminate this issue.

Bearing Modifications

  • Change standard Shielded bearings to Sealed bearings
  • Change bearing type to low temperature bearing
  • Install insulated bearings to protect against stray voltage currents

Brake & Brake Motor Modifications

  • Change brake coil voltage

Cords, Plugs & Grounding Provision Modifications

  • Install grounded line cord on single-phase motors — without plug
  • Install 6-foot to 9-foot grounded type cord, with plug on single-phase motors
  • Add an additional grounding screw to NEMA 48 and 56 Frame motors

Switches – Power Plug or Electronic Starting

  • Install on-off switch to 2 HP and smaller single-phase motors. Includes double-pole, single-throw switch in conduit box with switch guard and 6-foot, S.O. type cord

Condensate Drains

  • Install one or two condensation drains on 215T and smaller rolled Steel motors
  • Install an additional one-way, stainless steel, condensation drain on 182T and larger cast iron motors

Add Drip Covers

  • Install a drip cover on steel frame or cast iron, ODP type, motors

Leads – Reconnect, Remark & Extend

  • Re-connect leads in the motor's conduit box
  • Re-mark motor leads using custom labels
  • Add Crimp-type terminal lugs to any frame motors
  • Add Polaris or other type insulated lead terminations

Shaft Seals

  • Install and oil seal on 215T and smaller steel frame motors


  • Install a C-Face Kit on a non-C-Face 48 through 449T frame motor
  • Install a D-Flange on a 182T through 445T cast iron motor
  • Convert standard F1 motors to F2, sidewall or ceiling mount
  • Re-locate conduit box on NEMA 56-145T frame motors
  • Install B5 or B14 Flanges on IEC motors


  • Replace existing motor's nameplate with new nameplate having customer's part number, re-rate volt or frequency
  • Replace standard motor's aluminum or plastic label type plate with custom aluminum plate


  • Repaint motor to another specified color paint

Space Heaters

  • Add anti-condensation space heaters to totally enclosed or open motors

Motor Protection

  • Add a thermostat or thermistor to an AC or DC motor

Fungus Proofing, Rubberizing & Tropicalization

  • Special treatment to the motor's windings and mechanical parts to resist tropical environments

Shaft Modifications

Tachometer Mounting Provisions – DC Motors

Terminal Blocks – NEMA Motors

Encoder Kits

Blower Fan Kits

Conduit Box Kits – Larger Size

Field Services

At Lewis Motor Repair we provide a comprehensive set of in-field services, allowing for quicker repairs. Our turnkey in-field services provide your operation with greater up-time and steady productivity. Provided on a local level — throughout central and greater Minnesota — and a regional platform — South Dakota, North Dakota, Iowa, and Wisconsin — our field service specialists perform high caliber electric motor repairs and support on all OEM brands. Learn More.

Our On-Site Apparatus Services

All Repairs Performed Meet the Standards Put Forth by

EASA | The Electro-Mechanical Authority - logo NEMA | National Electrical Manufacturers Assocaition - logo IEC - logo