TIG 225 TIG - Welding machine LINCOLN ELECTRIC - Free user manual and instructions
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| Product Type | TIG Welding Machine (AC/DC) |
| Brand | Lincoln Electric |
| Model | TIG 225 TIG |
| Input Voltage | 230V, 1-Phase, 50/60 Hz |
| Output Current Range (DC TIG) | 5 - 225 A |
| Output Current Range (AC TIG) | 5 - 200 A |
| Duty Cycle (at 40°C) | 40% @ 225A, 60% @ 175A, 100% @ 135A |
| Welding Processes | TIG (GTAW) DC / AC, Stick (SMAW) |
| Weight | Approx. 85 kg |
| Dimensions (L x W x H) | 800 x 400 x 600 mm |
| Pulse TIG | Adjustable pulse frequency and background current |
| AC Balance Control | Adjustable for optimal cleaning action |
| Pre- and Post-Flow Gas Settings | Adjustable from 0.1 to 10 seconds |
| Slope Up / Down | Adjustable slope times (0–10 s) |
| Included Torch | Water-cooled TIG torch (approx 4 m) |
| Included Gas Regulator | Argon regulator with flow meter |
| Protection Features | Overheating, overvoltage, and short-circuit protection |
| Insulation Class | H |
| Standards Compliance | CE, IEC 60974-1 |
| Maintenance | Regular dust removal, check cable condition, replace torch consumables |
| Safety Precautions | Mandatory use of welding helmet, gloves, and protective clothing; secure gas cylinders |
| Spare Parts & Service | Contact Lincoln Electric authorized service for genuine parts |
Frequently Asked Questions - TIG 225 TIG LINCOLN ELECTRIC
What is the difference between AC and DC TIG welding?
DC TIG is used for steel, stainless steel, and copper; it provides a stable arc. AC TIG is used for aluminum and magnesium because it breaks the oxide layer through alternating polarity.
What gas is recommended for TIG welding?
Pure argon is most common. For thicker materials, argon-helium mixtures can be used. Gas selection depends on the base metal.
How do I set the correct amperage for TIG welding?
A general rule is 1 amp per 0.001 inch (0.025 mm) of material thickness. For example, 1/8 inch (3.2 mm) steel needs about 125 A. Adjust based on joint type and position.
What is the duty cycle and why does it matter?
Duty cycle is the percentage of time you can weld at a given current within a 10-minute period without overheating. For example, 40% @ 225A means you can weld for 4 minutes at 225A, then must rest for 6 minutes.
Can I weld aluminum with this machine?
Yes, the TIG 225 TIG can weld aluminum using AC TIG mode with proper settings and gas (pure argon). Use the AC balance control to adjust cleaning.
What safety equipment is required?
A welding helmet with appropriate shade (auto-darkening recommended), flame-resistant gloves, long-sleeved cotton or leather jacket, and safety glasses. Ensure good ventilation.
How do I set the pre-flow and post-flow times?
Pre-flow typically 0.3-0.5 seconds to purge air. Post-flow should be about 1 second per 10 A of weld current to protect the torch and cool the tungsten.
What electrode (tungsten) type should I use?
For DC TIG on steel, use thoriated (red) or ceriated (gray) tungsten. For AC TIG on aluminum, use pure (green) or lanthanated (gold) tungsten. Sharpen to a fine point.
Why does my TIG arc wander?
Common causes: contaminated tungsten (resharpen), incorrect gas flow (check for leaks, adjust flow), dirty base metal, or magnetic arc blow. Use AC on magnetic steels to reduce blow.
Where can I find a manual or spare parts?
The user manual can be downloaded from the Lincoln Electric website. For spare parts, contact an authorized Lincoln Electric service center or dealer. Keep the serial number ready.
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