Welding is an essential skill for many trades and hobbies. For those looking to get into TIG welding, having the right welder makes all the difference. This article will explore the best AC TIG welders currently available.
Best AC TIG Welders
Miller Dynasty 210 DX
The Miller Dynasty 210 DX is a popular AC/DC TIG welder for professional use. It provides excellent arc stability and control for welding aluminum and steel. Key features include:
| Power | 120V/240V |
| Amperage Range | 5-210 Amps |
| AC Frequency Control | 20-250 Hz |
The Dynasty 210 DX allows you to fine tune the AC frequency for optimized aluminum welding. The unit is backed by Miller’s excellent reputation and provides pro-level performance.
Lincoln Electric Square Wave TIG 200
Lincoln Electric’s Square Wave TIG 200 is another excellent AC/DC TIG welder with advanced inverter technology. Key specifications:
| Input Power | 120V/230V 1-Phase |
| Output Range | 3-200 Amps |
| AC Balance Control | Full Range |
The Square Wave 200 TIG provides a very stable arc and easy starts. The AC balance control gives you precision when welding aluminum. It’s a bit more affordable than the Miller Dynasty.
Everlast PowerTIG 255EXT
For an even more budget-friendly AC/DC TIG welder, consider the Everlast PowerTIG 255EXT. It offers tremendous value without sacrificing key features.
| Input Voltage | 120V/240V 1-Phase |
| Output Range | 5-250 Amps |
| AC Frequency | 20-250 Hz |
The Everlast 255EXT includes advanced IGBT inverter technology and a full-function foot pedal. It’s an excellent choice for hobbyists or home workshops.
Comparing the Options
When choosing the best AC TIG welder, consider your budget and any special features you may need. The Miller Dynasty offers the best performance and arc stability. The Lincoln Electric and Everlast models offer more affordable options with great value.
Technical Specifications
Miller Dynasty 210 DX
| Max Output Current | 210 Amps |
| Output Voltage Range | 10-18 Volts |
| AC Frequency Control | 20-250 Hz |
| AC Balance | 60% EN, 40% EP |
| Dimensions | 17 x 8.5 x 19.5 in |
| Weight | 38 lbs |
Lincoln Electric Square Wave TIG 200
| Max Amps | 200 Amps |
| Voltage Input | 120/240V 1-Phase |
| AC Balance Control | Full Range |
| HF Arc Starting | Yes |
| Dimensions | 16 x 8 x 17 in |
| Weight | 38 lbs |
Everlast PowerTIG 255EXT
| Max Amperage | 250 Amps |
| Voltage | 120/240V 1-Phase |
| AC Frequency | 20-250 Hz |
| AC Balance Control | Full Range |
| Dimensions | 18 x 10 x 17 in |
| Weight | 50 lbs |
Features
Miller Dynasty 210 DX
- Fan-On-DemandTM Cooling System
- Auto-LineTM Voltage Compensation
- Advanced Squarewave AC
- 120V/240V Dual Voltage
- Full Color Display Screen
- Program Memory
- Pulse Capabilities
- Foot AmptrolTM Capability
Lincoln Electric Square Wave TIG 200
- Next Generation Squarewave
- Full Range AC Balance Control
- Superior Arc Starts with HF
- 120V/240V Single Phase Input
- Full Function Foot Amptrol
- Portable Size and Weight
- 5 Year Warranty
Everlast PowerTIG 255EXT
- IGBT Inverter Technology
- Lift TIG Arc Starting
- Full Function Foot Pedal
- Pre-Flow/Post-Flow Gas Control
- 120V/240V Dual Voltage
- Digital Display Screens
- Pulse Capabilities
- Portable Size
Advantages and Disadvantages
Miller Dynasty 210 DX
Advantages:
- Very stable and consistent arc
- Excellent aluminum welding capabilities
- Advanced AC frequency controls
- Auto-line voltage compensation
- Fan-on-demand cooling system
Disadvantages:
- Expensive initial investment
- Heavy weight reduces portability
- Complex controls have learning curve
Lincoln Electric Square Wave TIG 200
Advantages:
- Affordable price point
- Lightweight and portable
- Next generation square wave AC
- Full range AC balance control
- 5 year warranty
Disadvantages:
- Maximum amperage limited to 200A
- No auto-line voltage compensation
- Foot pedal could be more responsive
Everlast PowerTIG 255EXT
Advantages:
- Most affordable price range
- Full function foot pedal included
- IGBT inverter technology
- Lift TIG starting
- Portable size
Disadvantages:
- Everlast brand not as well proven
- Maximum amperage limited to 250A
- No high frequency arc starting
- Less precise AC balance control
Comparing the Recommended AC TIG Welders
When comparing the Miller Dynasty 210 DX, Lincoln Electric Square Wave TIG 200, and Everlast PowerTIG 255EXT, there are some key factors to consider.
Performance
The Miller Dynasty offers the most advanced performance, with excellent arc stability, precise AC frequency control, and auto-line voltage compensation. It’s the clear leader for demanding welding jobs. The Lincoln Electric model also provides good arc quality with the next generation square wave inverter. The Everlast is a bit more basic but still offers decent functionality.
Price
The Miller carries a premium price tag while the Everlast model is the most budget-friendly option. The Lincoln Electric hits a nice middle-ground for value.
Portability
The small size and light weight of the Lincoln Electric Square Wave TIG 200 makes it the most portable model. The Everlast is also fairly compact. The Miller Dynasty is the heaviest unit.
Ease of Use
For beginners, the Everlast may be the easiest to learn on. The Lincoln Electric provides a good balance of capability without overly complex controls. The Miller Dynasty is feature-packed but has more advanced controls and settings to master.
For professional welders or anyone welding aluminum on a regular basis, the Miller Dynasty 210 DX is worth the investment. For more casual use, the Lincoln Electric and Everlast models both offer quality performance at lower price points.
Frequently Asked Questions
What thickness of aluminum can an AC TIG welder handle?
A 200 amp AC TIG welder can generally weld up to 1/4 inch thick aluminum. For material 3/8 inch and thicker, you would need a more powerful 300+ amp welder.
What size argon tank do I need?
A 125 cubic foot argon tank is a good standard size for most TIG welding applications. This will provide enough gas for hours of welding time before needing a refill.
Is AC or DC better for steel TIG welding?
For steel, DC is the preferred polarity as it provides good penetration and a stable arc. AC is primarily used for aluminum welding.
Can I plug a TIG welder into a regular 120v outlet?
Lower amperage TIG welders under 200 amps can typically run on a standard 120v household outlet. Higher power welders usually require 240v input.
What torch size is best for aluminum TIG welding?
For welding aluminum, a 17 or 18 series TIG torch typically works well. The larger torch sizes help provide the gas coverage needed for aluminum.
Conclusion
AC TIG welders allow welding of aluminum through the use of an alternating current. When choosing the best AC TIG welder, key factors include amperage range, AC controls, price, portability, and ease of use. The Miller Dynasty 210 DX is a top professional model while the Lincoln Electric Square Wave TIG 200 and Everlast PowerTIG 255EXT offer more affordable options. Understanding your needs and budget will help determine the right AC TIG welder for any project.
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