ISO 9001:2015 Certified Repair Facility

Large Industrial Motor & Generator Repair Services

Engineering-grade overhaul, high-voltage rewinding, precision machining, and full-load IEEE testing for rotating electrical equipment up to 20,000 HP.

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OEM-Grade Engineering Capabilities

Turnkey Electric Motor & Generator Remanufacturing Services

Operating from our ISO 9001:2015 certified 160,000+ sq. ft. headquarters in Warrior, Alabama, Louis Allis provides world-class overhaul, rewinding, and mechanical repair services for critical rotating electrical apparatus. Backed by over 120 years of legacy expertise, our engineering facility processes medium and high-voltage AC/DC electric motors, synchronous generators, and specialty drives for global heavy industries.

100,000 lbs. Crane & Rigging Capacity: Heavy-lift overhead cranes capable of handling massive industrial stators, rotors, and fully assembled frame units.
5,000 HP Water-Cooled Dynamometer: Full-load dynamic testing station capable of operating up to 3,600 RPM under load conditions per IEEE 115 and NEMA MG1 standards.
9-Foot VPI System & 7-Foot Dip Tanks: Vacuum Pressure Impregnation (VPI) with Class H epoxy resins ensures void-free dielectric insulation integrity for high-voltage stators.
100,000 lbs. Dynamic Balancing Machine: Precision hard-bearing balancing rig achieving ISO 1940 Grade G1.0/G2.5 operational balance tolerances.
Large 12' x 12' x 14' Burnout & Curing Ovens: Temperature-controlled heat processing units equipped with chart recorders to maintain core iron insulation integrity.
High-Current DC Power Supply (700V): Dedicated high-capacity power arrays for thorough testing of large DC armature, field coil, and traction motor assemblies.
Service Specializations

Comprehensive Overhaul & Repair Specializations

Louis Allis combines legacy engineering drawings with advanced predictive diagnostics to restore industrial motors and generators to original OEM specification or superior performance.

AC & DC Motor Rewinding

Expert precision rewinding for Low Voltage (LV), Medium Voltage (MV), and High Voltage (HV) equipment up to 13.8 kV.

  • Form-wound & random-wound stator coils
  • MIL-STD-2037 Navy sealed winding systems
  • Armature, equalizer, and field coil rewinds
  • Surge testing & core loss analysis

Mechanical Machining & Repair

Complete in-house machine shop capable of fabricating, shaft turning, and restoring precise mechanical tolerances.

  • Journal & shaft sleeve remanufacturing
  • End-bell bore sleeving & housing repair
  • Commutator turning, undercutting & seasoning
  • Laser shaft alignment & frame re-boring

IEEE & MIL-SPEC Quality Testing

Comprehensive electrical, mechanical, and thermal performance validation in our certified testing laboratory.

  • 5,000 HP full-load dynamometer testing
  • High-potential (Hi-Pot) & Megger insulation testing
  • CSI spectral vibration analysis
  • Partial discharge & tan delta diagnostic reporting
Quality Assurance & Compliance

Adherence to International Engineering Standards

Every industrial motor or generator serviced at Louis Allis undergoes rigorous quality gates compliant with recognized international marine, military, and power-generation standards.

Standard / Certification Technical Scope Quality Assurance Outcome
ISO 9001:2015 Quality Management System across all repair and manufacturing workflows Audited traceability of materials, procedures, and final testing parameters.
IEEE 43 / IEEE 115 Insulation resistance, polarization index (PI), and generator load parameters Guarantees dielectric strength and electrical safety under continuous full load.
NEMA MG1 / EASA AR100 Recommended practice for repair of electrical apparatus Ensures repaired units equal or exceed original manufacturer operational efficiency.
MIL-STD-2037 / MIL-SPEC Submersible, Navy-sealed, and severe-duty environmental insulation specs Maximum moisture, salt, and thermal shock resistance for marine and defense applications.
API 541 / API 547 Form-wound squirrel cage induction motors for petroleum and chemical industries Enhanced structural rigidity, bearing life, and low-vibration performance.
Why Choose Louis Allis

Minimizing Industrial Downtime with Proven Reliability

When critical operational equipment fails, global procurement directors and plant engineers require fast turnaround without compromising quality. Beyond our core repair facility, Louis Allis maintains an extensive stock of Factory Recertified Motors for immediate exchange, alongside nationwide mobile field engineering teams available for emergency emergency and planned outage support.

Request Technical Consultation or Repair Quote

Connect directly with our engineering specialist team to discuss motor specifications, repair lead times, or emergency field service assistance.