Lincoln Electric Precision TIG 275/375 Welder Professional AC/DC TIG Welding Machine
The Lincoln Electric Precision TIG 275/375 is a professional AC/DC TIG welding machine designed for precision fabrication, production welding, maintenance, motorsports, aerospace, and other demanding metalworking applications. Combining controlled TIG performance with Stick welding capability, the Precision TIG platform is built for welders who need dependable arc control across a broad range of materials and applications.
The Precision TIG 275 provides an output range of 2–340 amps, while the Precision TIG 375 extends the range to 2–420 amps, giving professional welders flexibility for both precision low-amperage work and heavier welding applications.
Professional Lincoln TIG Welding Performance
The Precision TIG 275 and Precision TIG 375 are designed around the requirements of professional TIG welding. Both machines provide AC/DC output and support TIG and Stick welding, making them useful for fabrication shops, production environments, repair facilities, and experienced welders who need more than a basic welding machine.
For TIG applications involving aluminum, the Precision TIG platform features AC Auto-Balance®, which automatically adjusts the balance between cleaning action and penetration. Welders can also manually adjust the AC balance when a specific combination of cleaning and penetration is required.
This level of control is particularly useful when welding aluminum and other applications where arc characteristics and heat management can affect the finished weld.
Precision TIG 275 – Versatile Shop Welding Machine
The Lincoln Precision TIG 275 is designed as a versatile TIG and Stick welding power source for professional shop applications.
It offers an output range of 2–340 amps, allowing it to handle low-amperage precision work as well as higher-output welding applications. Lincoln identifies the Precision TIG 275 for applications including fabrication, aerospace, production, motorsports, and vocational education.
The Precision TIG 275 also incorporates Micro-Start™ II technology, which is designed to improve low-amperage starting and arc stability for more controlled TIG welding and crater fills.
Precision TIG 275 Highlights
- AC/DC TIG welding
- Stick welding capability
- 2–340A output range
- AC Auto-Balance® for aluminum welding
- Micro-Start™ II technology
- Optional Advanced Pulse Control on applicable configurations
- Designed for fabrication and production welding
- Suitable for professional and educational welding environments
Precision TIG 375 – Higher-Output TIG Welding
For applications requiring additional welding output, the Lincoln Precision TIG 375 provides a broader 2–420 amp operating range. Lincoln describes the 375 as a full-featured TIG welding machine with standard pulse functions designed to provide greater control over heat input and help reduce distortion when welding thinner materials.
The Precision TIG 375 also incorporates AC Auto-Balance®, allowing the welder to automatically optimize the balance between cleaning action and penetration when TIG welding aluminum, while still providing manual adjustment when greater control is required.
Precision TIG 375 Highlights
- AC/DC TIG welding
- Stick welding capability
- 2–420A output range
- Standard pulse functions
- AC Auto-Balance®
- Micro-Start™ technology
- Designed for demanding TIG applications
- Suitable for professional fabrication and production welding
AC/DC TIG Welding for Aluminum and Steel
One of the major advantages of the Lincoln Precision TIG welding machine is its AC/DC capability.
AC TIG welding is commonly used for aluminum and other applications where oxide removal and controlled penetration are important. The Precision TIG’s AC Auto-Balance® technology helps manage the relationship between cleaning action and penetration during aluminum welding.
DC TIG welding can be used for materials such as steel and stainless steel when the appropriate welding setup and consumables are selected.
This combination gives the Precision TIG 275/375 the flexibility expected from a professional Lincoln welding machine.
Advanced TIG Pulse Control
Pulse welding can be useful when managing heat input, controlling the weld puddle, and limiting distortion on thinner materials.
The Precision TIG 375 includes standard pulse functions, while the Advanced Pulse Control panel is available as an option on applicable Precision TIG 275 configurations. Lincoln states that the pulse system can help minimize distortion caused by excessive heat input and can help moderate filler-metal deposition for a more consistent bead appearance.
For welders performing detailed fabrication or working with thinner materials, this additional control can be valuable when setting up the welding process.
Built for Professional Welders and Fabrication Shops
The Lincoln Precision TIG 275/375 is intended for applications where welding accuracy and control matter. Lincoln lists the product family for fabrication, aerospace, production, motorsports, and vocational education applications.
Typical applications may include:
- TIG welding
- Aluminum TIG welding
- Stainless steel welding
- Steel fabrication
- Precision metal fabrication
- Production welding
- Aerospace-related fabrication
- Motorsports fabrication
- Equipment repair
- Maintenance welding
- Professional welding training
Actual material compatibility, thickness capability, accessories, and welding parameters should always be determined according to the specific machine configuration and welding procedure.
Lincoln Precision TIG 275/375 Specifications
The Precision TIG 275 and Precision TIG 375 are separate models, so their specifications are listed separately below.
Precision TIG 275
| Specification | Details |
|---|---|
| Model | Precision TIG 275 |
| Processes | TIG, Stick |
| Output Type | AC/DC |
| Output Range | DC: 2–340A / AC: 5–340A |
| Rated Output | 275A / 31V / 40% Duty Cycle |
| Input | 208/230/460V, 1 Phase, 60 Hz* |
| Dimensions | 31 × 22 × 26 in. |
| Dimensions (Metric) | 787 × 559 × 660 mm |
| Net Weight | Approximately 397 lbs. / 180 kg |
*Input configuration varies by model number. Lincoln also lists configurations for other input voltages and frequencies. Verify the exact model number before purchase.
Precision TIG 375
| Specification | Details |
|---|---|
| Model | Precision TIG 375 |
| Processes | TIG, Stick |
| Output Type | AC/DC |
| Output Range | 2–420A |
| Rated Output | 375A / 35V / 40% Duty Cycle |
| Input | 208/230/460V, 1 Phase, 60 Hz* |
| Dimensions | 31 × 22 × 26 in. |
| Dimensions (Metric) | 787 × 559 × 660 mm |
| Net Weight | Approximately 507 lbs. / 230 kg |
*Input configuration varies by model number. Lincoln lists additional configurations, including 230/460/575V models. Verify the exact configuration being sold.
What’s Included?
Included equipment depends on the exact Precision TIG configuration and package being sold.
Lincoln offered both base-machine configurations and Ready-Pak® packages. Certain Ready-Pak configurations included components such as a cart, water cooler, foot control, TIG torch, regulator/flowmeter, work cable and other accessories.
Before purchasing, confirm the exact model number and included accessories listed with the product.
Who Is the Precision TIG 275/375 For?
The Lincoln Precision TIG series is suited to customers who need a professional TIG welding machine rather than a basic entry-level welder.
It can be a practical choice for:
Professional Welders
For welders who regularly perform precision TIG and Stick welding.
Fabrication Shops
For shops working with aluminum, steel, stainless steel, and other compatible materials.
Production Environments
For applications where repeatable welding parameters and controlled heat input are important.
Motorsports and Custom Fabrication
For detailed welding and fabrication work where control and weld appearance are important.
Welding Schools and Training Facilities
Lincoln identifies vocational education among the applications for the Precision TIG platform.
Why Choose Lincoln Electric Precision TIG?
The Lincoln Electric Precision TIG 275/375 combines AC/DC TIG welding, Stick welding capability, broad amperage ranges, AC balance control, and TIG-specific features designed around arc control.
The 275 provides up to 340 amps, while the 375 extends the range to 420 amps. Both models are designed for professional applications where weld control, reliability, and versatility are important.
For a professional welding supply inventory, fabrication shop, or experienced welder looking for Lincoln welding equipment, the Precision TIG series offers a dedicated solution for demanding TIG applications.
Lincoln Precision TIG 275 / 375 FAQs
What is the difference between the Precision TIG 275 and 375?
The Precision TIG 275 is rated at 275A at 40% duty cycle (DC 2–340A, AC 5–340A) and weighs about 397 lb. The Precision TIG 375 is rated at 375A at 40% duty cycle (2–420A) and weighs about 507 lb, for heavier-section work.
Can the Lincoln Precision TIG weld aluminum?
Yes. Both models provide AC TIG output for aluminum as well as DC TIG for steel and stainless steel.
Can the Precision TIG 275 / 375 stick weld?
Yes. Both models support TIG and Stick welding.
What input power does the Precision TIG need?
Common configurations use 208/230/460V single-phase, 60 Hz input. Input varies by model number, so confirm the exact configuration before ordering.
What is included with the Precision TIG?
Included equipment depends on the configuration. Some Ready-Pak versions included a cart, water cooler, foot control and TIG torch. Contact us to confirm what comes with the unit you select.
Shop Lincoln Electric TIG Welding Equipment
Whether you need a Lincoln TIG welder, professional welding machine, AC/DC TIG equipment, or a high-capacity welding power source for fabrication, the Precision TIG 275/375 is designed for serious welding applications.
Choose the correct Precision TIG configuration for your application and verify the model number, input voltage, condition, included accessories, and package contents before ordering.
Shop the Lincoln Electric Precision TIG 275/375 and equip your welding operation with professional AC/DC TIG welding equipment.
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