Electric motor armatures are critical components in industrial and commercial systems, and journal wear is one of the most common failure points. Traditional repair methods like TIG/MIG welding (overlay welding), sleeving, or stubbing often introduce excessive heat, distortion, and machining complexity, especially on small-diameter shafts.
Laser cladding (also known as laser weld overlay / overlay welding) offers a fundamentally different approach: precision material deposition with minimal heat input, enabling reliable restoration of even the most delicate armature journals.
Titanova’s Advantage in Laser Cladding
Titanova, Inc utilizes laser cladding technology (laser cladding services) to create thin, controlled weld overlays that significantly reduce heat-affected zones (HAZ) and distortion. This makes it possible to remanufacture electric armature journals ranging from very small diameters to large industrial shafts—without relying on sleeving or stubbing techniques.
One of the key advantages is the ability to apply low-dilution surface modification, allowing engineers to restore or enhance surfaces with corrosion- or wear-resistant alloys. Depending on application requirements, Titanova can apply laser cladding services using:
- Stainless steels for corrosion resistance
- Nickel- and chromium-based alloys for high-temperature and chemical resistance
- Cobalt-based alloys (such as Stellite™) for extreme wear environments
Why Precision Laser Cladding Matters
Compared to conventional welding methods (overlay welding), laser cladding introduces a controlled and highly efficient repair process:
Thin Clads
- Minimal pre-machining required (typically ~0.025” per side)
- Reduced material build-up lowers heat input and post-processing requirements
Low Heat Input
- Extremely small heat-affected zones
- Minimal distortion, preserving shaft geometry
- Low dilution ensures material integrity and performance
High Deposition Efficiency
- Deposition rates approximately 3–5× faster than TIG or MIG welding (overlay welding)
- Faster turnaround for laser cladding services and refurbishment projects
Superior Surface Quality
- Smoother as-clad surfaces reduce machining time and cost
- Improved dimensional consistency compared to conventional weld overlays
Enhanced Material Performance
- Enables tailored surface properties for corrosion and erosion resistance
- Alloy selection optimized per application requirements
Demonstration: Super Low-Heat Journal Restoration
To highlight the capability of laser cladding in extremely small-scale applications, Titanova conducted a demonstration using a dishwasher motor armature.
- Starting journal diameter: 0.43 in (11 mm)
- Length: 1 in (25.4 mm)
- Target finished diameter: 0.50 in
- Material build-up: ~0.030 in per side using 316 stainless steel via laser cladding services
Such a small-diameter shaft is typically considered impractical or impossible to repair using TIG or MIG welding (overlay welding) due to excessive heat distortion and lack of control.
The process successfully:
- Built the required material layer by layer
- Maintained dimensional stability
- Allowed precision machining to final specification
The result was a fully restored journal at 0.5” diameter with a smooth, machinable surface finish.
Industrial-Scale Application
Laser cladding is not limited to small components. Titanova has demonstrated large-scale refurbishment capability using laser cladding services on heavy industrial armatures, including:
- 6,000 lb capacity systems (13’7” length, 72” swing)
- 20,000 lb capacity systems (32’ length, 100” swing)
For example, a 4,750 lb GE DC armature (Model 824) with an 88” overall length was successfully repaired using localized laser cladding services on only the damaged journal areas.
Repair Scope Included:
- Journal surface restoration (pre-machined ~0.025” undersize)
- Application of 410 stainless steel overlay
- Hardness achieved: ~35 HRC
- Additional build-ups possible for thrust faces, keyways, and tapered surfaces
Speed and Turnaround Advantage
One of the major operational benefits of laser cladding services is speed. Typical laser cladding repairs require:
- ~1 hour of processing time (including setup for journal repair)
- Potential same-day or next-day turnaround
This significantly reduces downtime compared to conventional overlay welding methods.
Key Takeaways and Impact
Laser cladding represents a major advancement in the repair and remanufacturing of electric motor armatures. By combining low heat input, precise material deposition, and high-quality surface finishes, it enables the restoration of components that were previously considered unrepairable or economically impractical.
For the electrical motor repair industry, laser cladding services translate into lower repair costs, faster turnaround times, improved component performance and lifespan, and expanded repair capability across a wider range of armature sizes.
Titanova, Inc continues to apply laser cladding and overlay welding technologies to industrial-scale refurbishment challenges, opening new possibilities for sustainable and cost-effective motor restoration.
Ready to Discuss Your Project?
Contact Information
John M. Haake
President, Titanova, Inc
198 Hughes Lane, St. Charles, MO 63301
Phone: 636-487-0060
Fax: 636-487-0061
ISO 9001:2015 Certified