- Advanced waveform TIG at low-hour demo pricing. The Aspect 230 is Lincoln's advanced-capability compact TIG — PowerConnect voltage flexibility (120–460 V), IntelliStart technology, and 9-program memory storage. Factory demo pricing reduces acquisition cost 15–25% below MAP while preserving full specifications and 3-year warranty coverage.
- PowerConnect runs on 120 V, 208 V, 230 V, or 460 V — automatically. No manual rewiring, no external auto-transformer. The Aspect 230 detects input voltage and optimizes output accordingly. It's the only TIG in its class that can operate on a standard 120 V household circuit AND a 460 V industrial drop from the same unit.
- Low-hour unit — trade show and evaluation use only. This U4340-1 unit has minimal arc-on time from Lincoln Electric's authorized demonstration program. Not a production shop machine. Ships from WeldingMart in 1–3 business days — no 8-week new-machine lead time.
| SKU / Model | U4340-1 (Low-Hour Factory Demo) |
| Output Range (120 V) | 2–150 A TIG AC/DC; 10–100 A Stick |
| Output Range (208–460 V) | 2–230 A TIG AC/DC; 10–200 A Stick |
| Polarity | AC/DC |
| Input Voltage | 120–460 V, 1 or 3-Phase, 50/60 Hz (PowerConnect) |
| Input Current | 120 V: 21 A; 208/230/460 V: 11/10/5 A |
| Duty Cycle | 60% TIG & Stick (all voltage configurations) |
| IntelliStart Technology | Yes — automatic start optimization by material thickness |
| Memory Locations | 9 user-programmable weld setups |
| Net Weight | 50.5 lbs / 22.9 kg |
| Dimensions (H×W×D) | 16.5 in × 9.7 in × 19.9 in (419 × 246 × 506 mm) |
| Warranty | 3 Years — full factory warranty |
| Condition | Low-Hour Factory Demo — Lincoln Electric certified |
- Aspect 230 Power Source
- TIG Torch & Cable Assembly
- Foot Amptrol with cable
- Gas Regulator / Flowmeter
- Gas Hose
- Work Cable & Clamp
- Electrode Holder & Cable
- Factory documentation and warranty card
The Aspect 230's 50.5 lb frame and PowerConnect input make it ideal for mobile and multi-location use. Compatible accessories from WeldingMart:
- Flexible-Neck TIG Torches — 12.5 ft and 25 ft PTA-17 and PTA-26 air-cooled torches; flex-neck bodies for tube and pipe orbital applications
- TIG Filler Rod — ER4043 & ER5356 aluminum; ER308L, ER316L stainless; ERTi-2 titanium; ER70S-2 carbon steel in 1 lb and 10 lb packs
- Compact Argon Regulators — single-stage and dual-stage CGA-580 flowmeters for field and shop use; lightweight units for portable setups
- TIG Consumable Kits — 1/16 in, 3/32 in, and 1/8 in ceriated and lanthanated tungsten; gas lens kits; ceramic and glass cup assortments
The Aspect 230's PowerConnect flexibility and advanced controls serve mobile professionals and precision fabricators equally well:
- Automotive fabrication & restoration. DC TIG at 2–230 A welds thin 4130 chromoly tubing, stainless exhaust systems, and aluminum engine components with IntelliStart providing controlled arc initiation on every material transition. Store up to 9 programs for different alloys and thicknesses — switch jobs without re-dialing parameters.
- Aerospace maintenance. 2 A minimum output and IntelliStart make the Aspect 230 suitable for thin titanium and aluminum aerospace repairs where standard arc starts cause burn-through. The machine's waveform sequencer enables pre-set gas purge, upslope, peak current, downslope, and post-flow — reducing operator error on critical repairs.
- Fine sheet metal & stainless steel fabrication. DC TIG on 18–22 gauge 304/316L stainless with pulse mode and the sequencer produces consistent, low-distortion beads on food equipment, pharmaceutical tubing, and architectural stainless without per-weld setup reconfiguration.
- Field service & mobile TIG. At 50.5 lbs and PowerConnect 120–460 V input, the Aspect 230 goes where other TIG machines can't: service vans, generator-powered field repairs, international facilities with non-U.S. power standards, and rental equipment environments with unknown panel configurations.
- Aluminum welding — bikes, marine, architectural. AC TIG up to 230 A handles aluminum from 1/16 in bicycle frames to 1/4 in marine fittings and architectural handrails. PowerConnect auto-adapts output to available voltage — useful for portable field fabrication where 240 V shore power may not be available.
PowerConnect is Lincoln Electric's automatic input voltage detection and adaptation system. The Aspect 230 accepts 120 V, 208 V, 230 V, or 460 V single or three-phase input without any manual reconfiguration. Plug into any outlet, and the machine automatically adjusts its internal rectification and output to maximize performance on that voltage. No external auto-transformer required.
Lincoln Electric designates the U4340-1 low-hour because it was used exclusively for authorized trade show demonstrations and dealer evaluations — not production welding. Minimal arc-on time. It has been refurbished at Lincoln's certified service center, tested to factory tolerances, and issued a full 3-year manufacturer warranty identical to a new Aspect 230.
Yes. On 120 V, the Aspect 230 delivers up to 150 A TIG output and 100 A Stick output — sufficient for aluminum up to 3/16 in and steel up to 1/4 in. For heavier work, connect to 208–460 V for the full 230 A TIG and 200 A Stick rating.
Nine (9) user-programmable memory locations store complete weld setups — including process, amperage, pulse parameters, sequencer settings, and gas timing. Recall any setup instantly with a single button press. Useful for shops running multiple material types (aluminum, stainless, titanium) with different setups throughout the day.
Electrically and mechanically identical to the new K4340-1. The U-prefix unit has the same PowerConnect input range, same IntelliStart technology, same 9-program memory, same duty cycle, and the same 3-year factory warranty. Factory demo units may show minor cosmetic marks from trade-show handling. Price difference is typically 15–25% below MAP.
Looking for the brand-new version? See brand-new Aspect 230 or browse all Lincoln TIG Welders and our full used TIG welders collection.
The Lincoln Aspect 230 AC/DC Factory Demo represents an exceptional opportunity to acquire Lincoln's premium TIG welding technology with minimal previous use at enhanced value. This sophisticated inverter-based arc welding power source has been specifically optimized for professional AC/DC TIG and Stick welding applications demanding the highest levels of precision and control. As a true professional's choice, the Aspect 230 delivers advanced waveform capabilities, comprehensive sequencer functionality, and precise pulse controls that allow expert welders to achieve exceptional results across diverse materials and applications.
What truly distinguishes the Aspect 230 is its remarkable combination of power, versatility, and user-focused design. With up to 230 amps of maximum output, this system confidently handles aluminum materials up to 1/4 inch thick while maintaining the precision necessary for delicate work. Lincoln's innovative PowerConnect Technology enables unparalleled input power flexibility, accommodating voltage ranges from 120V to 460V without manual reconfiguration, making this system ideal for mobile applications across varying power infrastructures. The intuitive interface allows welders to easily customize all parameters to their specific application requirements and save these configurations in up to 9 memory locations for instant recall of critical settings.
The Aspect 230 incorporates Lincoln's advanced IntelliStart technology, which automatically optimizes start parameters based on material thickness, providing softer starts with minimal distortion on thinner materials while delivering the higher heat input required for thicker workpieces. The optional AC Auto Balance technology further enhances aluminum welding performance by automatically determining the optimal balance between cleaning action and penetration. Despite its comprehensive capabilities, the Aspect 230 maintains exceptional portability at just 50.5 pounds, making it ideal for applications requiring mobility between job sites. This low-hour factory demo unit has been thoroughly inspected and certified by Lincoln Electric, offering professional welders an outstanding value on premium TIG welding technology.
- Exceptional arc response and stability across all welding applications
- Highly customizable TIG machine with advanced waveform and sequencer controls
- PowerConnect Technology enabling seamless operation with 120-460V input power
- Powerful 230 Amp maximum output capacity for TIG welding aluminum up to 1/4 inch
- IntelliStart technology automatically optimizing start parameters based on material thickness
- Optional AC Auto Balance technology for simplified aluminum welding with optimal cleaning and penetration
- Comprehensive memory system with 9 storage locations for critical weld setup information
- Portable, lightweight design at just 50.5 pounds for easy transportation between job sites
- Low-hour factory demo unit offering premium technology with minimal previous use
| Dimensions (H x W x D) | 16.5 in x 9.7 in x 19.9 in (419 mm x 246 mm x 506 mm) |
| Net Weight | 50.5 lbs (22.907 kg) |
| Input Voltage | 120-460 |
| Input Current | 120V: 21A 208/230/460V: 11A/10A/5A |
| Input Hertz | 50/60 |
| Input Phase | 1/3 |
| Input Power | 120/1/50/60-460/1/3/50/60 |
| Mode Icon | CC |
| Output Range | 120V: 2-150A TIG 208/230/460V: 2-230A |
| Polarity | AC/DC |
| Typical Application | Automotive Brewery Distillery Maintenance & Repair Marine Applications Marine Fabrication & Repair Repair Welding Shipbuilding |
| Warranty | 3 Years |