- Professional 275 A AC/DC TIG at demo pricing. The Precision TIG 275 sits between the 225 and 375 in Lincoln's lineup — 340 A max output covers aluminum up to 1/2 in and steel up to 3/8 in. Factory demo pricing delivers 15–25% savings over MAP while preserving every specification, feature, and warranty term of the new machine.
- Full 3-year Lincoln Electric warranty, no exclusions. This is not a grey-market or third-party refurb. Lincoln Electric certifies the U2618-1 directly. Warranty claims go through Lincoln's authorized service network — the same process and same SLA as any new K-series machine.
- Multi-voltage flexibility — 208 V, 230 V, or 460 V. Fabrication shops and maintenance facilities with varying panel configurations can install the Precision TIG 275 on any of three standard industrial voltages without external transformers or rewiring.
| SKU / Model | U2618-1 (Factory Demo Ready-Pak) |
| Output Range | 2–340 A (TIG AC/DC); 2–275 A (Stick) |
| Polarity | AC/DC |
| Input Voltage | 208 / 230 / 460 V, 1-Phase, 60 Hz |
| Input Current | 40% DC: 104/94/47 A (208/230/460 V); 60% DC: 86/78/39 A |
| Duty Cycle | 60% @ 340 A (230 V, 1-ph) |
| Open Circuit Voltage | 75 V max |
| AC Frequency Range | 20–150 Hz (adjustable) |
| Net Weight | 683 lbs / 309.8 kg (with cart) |
| Dimensions (H×W×D) | 49.7 in × 28 in × 41 in (1262 × 711 × 1041 mm) |
| Warranty | 3 Years — full factory warranty |
| Condition | Factory Demo / Reconditioned — Lincoln Electric certified |
- Precision TIG 275 Power Source
- TIG Torch & Cable Assembly
- Foot Amptrol with cable
- Gas Regulator / Flowmeter
- Gas Hose
- Work Cable & Clamp
- Electrode Holder & Cable
- Accessory Kit (collets, collet bodies, back caps, cups)
- Mobile Undercarriage Cart
The Precision TIG 275 is compatible with 17, 18, and 26-series torch bodies. Recommended accessories from WeldingMart:
- TIG Torches — PTA-17 (12.5 ft), PTA-26 (25 ft), and flexible-neck models for positional work
- TIG Filler Rod — ER4043 & ER5356 aluminum; ER308L, ER316L stainless; ER70S-2 & ER80S-D2 steel; ERTi-2 titanium
- Argon & Argon/Helium Regulators — dual-stage flowmeters for stable high-flow delivery at 275 A
- TIG Consumable Kits — 3/32 in and 1/8 in ceriated and lanthanated tungsten electrodes; argon lens kits
The Precision TIG 275's 2–340 A range and highest-in-class duty cycle serve a broad range of professional applications:
- Aerospace structural repair & fabrication. Micro-Start II Technology enables arc starts at 2 A — essential for precision titanium, Inconel, and thin-gauge aluminum aerospace repairs where heat control is critical and rework is expensive.
- Automotive racing fabrication. AC aluminum welding with adjustable AC balance covers cast-aluminum intake manifolds, billet suspension components, and tube-chassis nodes. DC TIG handles chromoly roll cages and stainless exhaust systems in the same session.
- Fine sheet metal & stainless fabrication. Advanced Pulse Control option (optional upgrade panel) reduces heat input on 16–20 gauge 316L stainless pharmaceutical and food-grade equipment, minimizing distortion and discoloration.
- Shipbuilding & marine fabrication. AC aluminum at 340 A handles thick hull-plate sections while DC TIG covers stainless and carbon steel structural members. Multi-voltage input means the machine installs easily in shipyard environments with mixed power infrastructure.
- Construction & heavy maintenance. 340 A output with 60% duty cycle sustains production-pace welding on structural steel, pipe joints, and crane components without thermal-protection interruptions during extended repair sequences.
Factory demo units are manufactured to Lincoln Electric's standard production tolerances, used for authorized trade show demonstrations or distributor evaluations, then refurbished at Lincoln's certified service center. Each unit is inspected, adjusted to factory spec, tested, and assigned a U-prefix serial number. They carry a full 3-year Lincoln Electric manufacturer warranty.
Electrically and mechanically identical to the new K2618-1. The U-prefix unit has the same output range, same AC frequency control, same Micro-Start II technology, same duty cycle, and same warranty. Factory demo units may show minor cosmetic marks from trade show handling. The price difference (typically 15–25% below MAP) is the primary distinction.
208 V, 230 V, and 460 V single-phase, 60 Hz. No external transformer or manual rewiring required when switching between voltage sources — the machine automatically adapts. This makes it compatible with standard 240 V residential drops, commercial 230 V service, and industrial 460 V panels.
Yes. This Ready-Pak listing includes the understorage cart, TIG torch and cable assembly, foot amptrol, gas regulator, work lead, and electrode holder — a complete welding station out of the box.
The Stick (SMAW) output handles 5/32 in (4.0 mm) electrodes including demanding E6010, E6011, E7018, and E308L-16 stainless rods. The 340 A ceiling provides adequate heat for heavy low-hydrogen passes on structural steel and pressure vessel applications.
Looking for the brand-new version? See brand-new Precision TIG 275 or browse all Lincoln TIG Welders and our full used TIG welders collection.
The Lincoln Factory Demo Precision TIG 275 TIG Welder Ready-Pak delivers exceptional welding performance with unmatched versatility, offering the widest operating range in its class with an extraordinary 2 to 340 amp output capability. This comprehensive welding solution incorporates Lincoln Electric's patented Micro-Start II technology, a revolutionary advancement that significantly enhances arc initiation and stability throughout the welding process, enabling operators to achieve remarkably precise welds and superior crater fills across diverse material types and thicknesses. The Ready-Pak configuration provides a complete welding solution with all essential components assembled and ready for immediate implementation, allowing fabricators to quickly deploy this versatile technology across diverse applications. This factory demonstration unit showcases the Precision TIG 275's exceptional capabilities in a ready-to-use package, making it the ideal solution for maintenance applications, fabrication operations, and industrial facilities requiring professional-grade TIG and Stick welding performance with simplified setup and operation.
The Precision TIG 275 excels through its intuitive operator interface that dramatically simplifies the welding process while maintaining advanced capabilities for experienced welders. The straightforward control panel allows operators to quickly select welding mode and polarity before beginning production, reducing setup time and enhancing productivity. For aluminum welding applications, the system's innovative AC Auto-Balance technology automatically optimizes the critical cleaning-to-penetration ratio, ensuring consistent, high-quality welds without requiring constant operator intervention. When applications demand precise control, the system enables complete manual adjustment of the AC balance, allowing skilled operators to increase penetration for thicker materials or enhance cleaning action when working with heavily oxidized surfaces. The optional Advanced Pulse Control panel upgrade integrates sophisticated pulsing capabilities, enabling precise regulation of heat input to minimize material distortion on thin sections while also moderating filler metal deposition for consistent, aesthetically superior bead appearance.
The Lincoln Precision TIG 275 Ready-Pak delivers exceptional operational versatility through its comprehensive feature set designed for professional welding environments. The system's remarkable output range spans from an exceptionally low 2 amps for delicate thin materials up to a robust 340 amps for heavy-duty applications, enabling fabricators to address virtually any TIG or Stick welding challenge with a single machine. Beyond its advanced TIG capabilities, the system provides outstanding Stick welding performance with the capacity to handle electrodes up to 5/32 inch (4.0 mm) in diameter, making it a truly multi-process solution for diverse fabrication requirements. The thoughtful design includes convenient side-mounted torch holder and connection panel that provides organized cable management while protecting critical components from damage during transport or when not in use. The multi-voltage input capability accommodates 208V, 230V, and 460V power sources, providing exceptional installation flexibility across diverse workshop environments. This comprehensive approach to TIG and Stick welding makes the Precision TIG 275 Ready-Pak an exceptionally versatile solution for applications ranging from construction and automotive repair to food and beverage equipment manufacturing, marine fabrication, and pharmaceutical equipment production—delivering professional-grade capabilities with simplified operation for welders of all skill levels.
- Industry-leading operating range spanning from 2 to 340 amps for exceptional application versatility.
- Patented Micro-Start II technology delivering superior arc initiation, stability, and precision.
- Innovative AC Auto-Balance automatically optimizing aluminum welding performance.
- Manual AC Balance control enabling precise adjustment of cleaning action and penetration.
- Optional Advanced Pulse Control panel for minimizing distortion and controlling bead appearance.
- Outstanding Stick welding capabilities supporting electrodes up to 5/32 inch (4.0 mm).
- Practical side-mounted torch holder and connections for enhanced cable management.
- Multi-voltage input compatibility supporting 208V, 230V, and 460V power sources.
- Complete Ready-Pak configuration providing all essential components for immediate implementation.
| Dimensions (H x W x D) | 49.7 in x 28 in x 41 in (1262 mm x 711 mm x 1041 mm) |
| Net Weight | 683 lbs (309.809 kg) |
| Input Voltage | 208/230/460 |
| Input Current | 40% Duty Cycle: 104/94/47A, 60% Duty Cycle: 86/78/39 |
| Input Hertz | 60 |
| Input Phase | 1 |
| Input Power | 208/230/460/1/60 |
| Mode Icon | CC |
| Output Range | 2-340A Max OCV: 75V |
| Polarity | AC/DC |
| Included Components | Precision TIG 275 Power Source TIG Torch and Cable Assembly Work Clamp and Cable Gas Regulator/Flowmeter Gas Hose Electrode Holder and Cable Accessory Kit |
| Typical Application | Construction Automotive Brewery Distillery General Fabrication Maintenance & Repair Marine Applications Marine Fabrication & Repair Pharmaceutical Equipment Repair Welding Shipbuilding |
| Warranty | 3 Years |