Precision repair, rewinding, machining, and dynamic testing for large AC & DC electric motors and generators up to 20,000 HP.
Louis Allis delivers comprehensive industrial electric motor repair and generator maintenance services for heavy industrial applications worldwide. With over 120 years of continuous manufacturing and engineering history, our technicians bring decades of specialized expertise to every project—regardless of the original motor manufacturer or technical complexity.
Operating out of our ISO 9001:2015 certified facility in Warrior, Alabama, USA, we handle everything from standard overhauls to complex high-voltage rewinding and custom mechanical modifications. We are certified for MIL-STD-2037 Navy Sealed System Windings, guaranteeing that our marine and naval motor repairs meet the highest quality standards demanded by government and industrial defense buyers.
Our state-of-the-art facility is fully equipped to restore, re-engineer, and test electrical rotating equipment to peak operating efficiency.
High-voltage, medium-voltage, and low-voltage stator and rotor rewinding services. Utilizing VPI (Vacuum Pressure Impregnation) and MIL-STD-2037 sealed insulation systems for maximum dielectric strength and thermal endurance.
Precision CNC machining, shaft manufacturing, journal sleeving, end-bell reconstruction, and housing restoration. Complete mechanical rehabilitation to original factory tolerances or custom engineering specifications.
Advanced diagnostic testing including core-loss testing, surge testing, partial discharge analysis, and full-load power testing to ensure flawless performance prior to field installation.
Proper rotor dynamic balancing is essential to prevent vibration, minimize bearing stress, and eliminate catastrophic mechanical failure. At Louis Allis, we utilize high-precision hard-bearing balance machinery capable of balancing rotating components weighing up to 15,000 lbs.
Our dynamic balancing procedures consistently achieve ISO G2.5 precision standards, with specialized capability to meet ultra-precise G1 specifications for critical industrial and military applications. All measuring equipment undergoes annual NIST-traceable calibration to maintain absolute quality control.
When a primary coal extraction operation experienced an unexpected failure on a critical 1,000 HP electric motor, downtime costs mounted rapidly. The customer needed an immediate, reliable repair solution without waiting months for OEM manufacturing.
The Louis Allis engineering and repair crew executed an expedited tear-down, failure analysis, coil rewinding, dynamic rotor rebalancing, and load testing—completing full reconditioning and returning the 1,000 HP unit to active production in under two weeks.
Contact our engineering specialists today to discuss your repair requirements, schedule an on-site field inspection, or request emergency outage support.
