The Lincoln Electric Precision TIG® 275 and 375 welders deliver a powerful combination of precision, control, and versatility for professional fabrication, production, and maintenance applications. Designed for both thin materials and heavy-duty welding, these AC/DC TIG machines provide exceptional arc stability and performance across a wide range of projects.
Whether you choose the Precision TIG® 275 for general shop use or the higher-output Precision TIG® 375 for thicker materials and demanding jobs, both machines feature advanced technologies like Micro-Start™ II and AC Auto Balance® to ensure consistent, high-quality welds. :contentReference[oaicite:0]{index=0}
- AC welding for aluminum and DC welding for steel and stainless
- Ideal for fabrication, aerospace, motorsports, and production
- Handles both thin materials and heavy-duty applications
- Delivers smooth, stable arc starts at low amperages
- Improves arc stability throughout the weld
- Provides precise crater fill for cleaner finishes
- Automatically adjusts cleaning vs. penetration
- Produces consistent aluminum welds with minimal setup
- Manual override allows full control when needed
- Precision TIG® 275: 2–340 amps
- Precision TIG® 375: 2–420 amps
- Weld everything from thin sheet metal to thicker materials
- Standard on Precision TIG® 375, optional on 275
- Reduces heat input to minimize warping and burn-through
- Improves bead appearance and consistency
- Supports Stick (SMAW) welding for added versatility
- Handles electrodes up to 5/32 in. (4.0 mm)
- Great for maintenance and repair work
- Side-mounted torch holder for organized cable management
- Simple, intuitive controls for quick setup
- Durable design for long-term reliability
- Up to 275 amps output
- Ideal for general fabrication and shop use
- Optional pulse control
- Up to 375 amps output with higher duty cycle
- Better suited for thicker materials and heavy-duty applications
- Built-in TIG pulse control standard
- Include water cooler, TIG torch, and Foot Amptrol™
- Regulator/flowmeter and work cable included
- Shipped fully assembled for fast setup
- Fabrication and production welding
- Aerospace and precision TIG work
- Motorsports and custom fabrication
- Maintenance and repair operations
The Precision TIG® 275 and 375 offer a perfect balance of control, power, and flexibility. With advanced arc technology, wide output ranges, and optional or built-in pulse control, these machines are built to handle everything from delicate TIG work to heavy-duty fabrication with confidence.
This depends on the specific model. Lincoln Electric TIG welders labeled "AC/DC" support both AC output (for aluminum and magnesium welding) and DC output (for steel, stainless, titanium, and other metals). DC-only TIG machines are used for steel and stainless welding. Refer to the spec sheet or product label to confirm AC/DC capability for your unit.
Most Lincoln Electric inverter-based TIG welders in this class include high-frequency arc start for non-contact electrode ignition, which helps protect tungsten and produce clean welds. Some models also support lift-arc start. Refer to the owner's manual for arc start options and settings for your specific unit.
Foot pedal and hand amperage controls are typically optional accessories for Lincoln Electric TIG welders, sold separately. The remote control receptacle is built into the machine. Contact WeldingMart if you would like to add a compatible foot pedal or torch-mounted amptrol to your order.
Output range and duty cycle vary by model. Lincoln TIG welders in this class typically offer 5–200A (smaller units) up to 5–375A (advanced units) with duty cycles ranging from 40% to 100% at rated amperage. See the spec sheet for exact ratings for your model.
For DC TIG welding (steel, stainless), 2% ceriated (gray) or 2% lanthanated (gold) tungsten is commonly recommended. For AC TIG welding (aluminum) on inverter machines, a balled pure tungsten or zirconiated tungsten is typically used. Refer to the owner's manual for Lincoln Electric's specific recommendations for your unit.
Yes — this is a factory demo or low-hour unit sourced directly from Lincoln Electric. Units are mechanically sound and may show light cosmetic wear from display use. Contact WeldingMart for information on any remaining manufacturer warranty associated with your specific unit number.