GZ GUOZHI 145A MIG Soldering Iron review

? Are you trying to decide whether the GZ GUOZHI 145A MIG Soldering Iron, 3 in 1 MIG FLUX Welder/Lift TIG/ARC Multi-Process MIG Welder, 110V Flux Core Welder Machine with Large LCD Display fits your workshop and welding needs?

Quick take on the GZ GUOZHI 145A 3-in-1 Soldering Machine

You’ll appreciate that this is a true multi-process unit that promises MIG, Flux-Core, Lift TIG (TIG gun not included), and ARC/MMA capability in one compact package. It’s marketed with a 145A rating, large LCD screen, and a synergetic control system to simplify parameter adjustments, which makes it approachable for hobbyists and useful for more experienced users.

Who this is aimed at

You’ll find this model attractive if you want a portable, multi-process machine for light to medium welding tasks, occasional repairs, or mobile work that requires flexibility across processes. It’s particularly useful when you want to carry a single machine that can handle flux-core welding for rusted metal, MIG for quicker shop work, and MMA/Stick for outdoor or windy conditions.

Technical specifications at a glance

You’ll get the main specs summarized here so you can quickly compare this machine with what you already own or are considering buying. Where the manufacturer didn’t specify a detail, you’ll see a clear note so you know what to verify with the seller.

Specification	Detail
Product name	GZ GUOZHI 145A MIG Soldering Iron, 3 in 1 MIG FLUX Welder/Lift TIG/ARC Multi-Process MIG Welder
Maximum current	145 A (model label)
Input voltage	110V (wide design 90V–140V)
Processes	MIG, Flux-Core, Lift TIG (TIG gun not included), ARC/MMA
Wire capacity	Holds 2 pounds of flux-core wire
Wire diameter	0.04 inch (listed)
MMA/Stick rods	Less than 1/8 inch
Display	Large LCD screen
Synergetic control	Yes (automatic feed/voltage changes by adjusting amperage)
Protections	Overheat, over-current, over-voltage, overload
Operating temperature	Can operate normally at -15°C (listed)
Included accessories	1 x 145 Amp Soldering Iron, Electrode Holder (500A), Earth Clamp (500A), MIG Gun (pre-installed), Soldering Cable, 2 x Gun Accessories
TIG gun	Not included
Weight	Not specified (described as small/light)
Duty cycle	Not specified
Warranty	Not specified

Key features and why they matter

You’ll want to focus on certain features that make this machine versatile: its multi-process capability, synergetic control, large LCD, and safety protections. Those features affect how easy it is to use, what jobs you can tackle, and how reliably it performs in different environments.

3-in-1 capability

You’ll be able to switch between MIG, Flux-Core, and ARC/MMA modes, and use Lift TIG if you supply a TIG torch separately. That means you don’t need separate machines for tack welding, repairs, and stick welding in windy or outdoor conditions.

Synergetic control and large LCD

You’ll find the synergetic control helps by automatically adjusting wire feed speed and voltage relative to the amperage setting, which reduces guesswork for beginners. The large LCD makes settings visible and adjustments easier, so you can fine-tune for cleaner welds without squinting at tiny dials.

Wide voltage range

You’ll benefit from the wide input voltage tolerance (90V–140V) if your power supply is unstable or if you work in locations with fluctuating voltage. This improves reliability and prevents frequent tripping or inconsistent weld performance due to input swings.

Safety features

You’ll appreciate built-in protections like overheating, over-current, over-voltage, and overload protection that reduce the chance of machine failure or damage during heavy use. These protections also increase safety for you and extend the machine’s service life.

What’s in the box and first impressions

You’ll find the package contains the core essentials to get started quickly with MIG/flux-core and stick welding, while the TIG function requires an additional torch. The included MIG gun is pre-installed and the kit lists a 500A electrode holder and earth clamp, which are robust for the machine’s rated output.

Items included

You’ll get the 145 Amp welding unit, a MIG gun pre-installed, an electrode holder (500A), an earth clamp (500A), a soldering cable, and a small number of gun accessories. This coverage means you can start flux-core or stick welding right away and later add a TIG torch if you want to use the Lift TIG feature.

Packaging and build quality impression

You’ll notice that the machine is described as compact and light, which makes it easy to move, though the manufacturer doesn’t list an exact weight. The presence of a large LCD and clear labeling helps you feel confident that the controls will be straightforward to use once you set it up.

Design, controls, and usability

You’ll find the layout is designed for accessibility, with a large LCD and user-friendly synergy features that lower the learning curve. The build is compact for portability but appears sufficient for light workshop or field use.

Control panel and display

You’ll use the large LCD to view and adjust key parameters, and the synergetic mode will automatically adjust feed and voltage to match your chosen amperage. If you prefer full control, you can switch to manual mode and fine-tune parameters yourself, which experienced welders often prefer for tricky joints.

Switching modes and settings

You’ll be able to change welding processes via the front panel, though you’ll need to handle a separate TIG torch if you plan to use the Lift TIG option. The synergy feature is great for quick setup, while the manual mode gives you freedom to experiment and optimize for different sheet thicknesses and materials.

Setup and first weld — what to expect

You’ll set up the machine quickly for flux-core or MIG welding since the MIG gun comes pre-installed and the wire spool capacity supports a 2 lb coil. Getting your first weld will likely involve basic steps: loading wire, setting polarity/gas (if using MIG with shielding gas), and choosing amperage or letting synergetic mode recommend settings.

Step-by-step start

You’ll mount the 2 lb flux-core coil on the spindle, thread the wire through the drive system, set the wire diameter to the listed 0.04 inch, and connect the earth clamp. For flux-core you won’t need external gas, but for true MIG with shielding gas you’ll need an external cylinder and plan for gas hose connections (not included).

First weld tips

You’ll want to begin with lower amperage and increase gradually until you achieve a stable arc and minimal spatter, especially if you’re using flux-core. Watch your wire feed and distance from the workpiece to avoid burnbacks and poor penetration; the LCD and synergy mode will make this easier.

MIG and Flux-Core performance

You’ll use flux-core for quick outdoor or rusty metal work without shielding gas and MIG for cleaner indoor welds when you add a gas bottle. The machine’s synergetic control is helpful in achieving a readable arc and consistent feed speed, reducing splatter.

Flux-Core specifics

You’ll be able to use flux-core wire in 2 lb coils and the specified 0.04 inch diameter, which suits thinner-to-medium panels and general repair work. Flux-core performs well with the included equipment for auto-body touch-ups, farm equipment repairs, and fabrication where shielding gas is inconvenient.

MIG (with gas) specifics

You’ll need to source a gas bottle and regulator to run true gas-shielded MIG, and the machine’s wide voltage tolerance helps maintain arc stability. The synergetic control will adjust feed rates as you change amperage, making gas-MIG easier to dial in—just remember the MIG gun included is pre-installed but the machine might lack a gas hose/regulator in the box.

Lift TIG and ARC/MMA performance

You’ll be able to use Lift TIG if you buy a TIG torch and set the unit accordingly, though the torch itself is not included in the package. For Stick/ARC welding, the unit claims compatibility with rods under 1/8 inch, which makes it suitable for general stick welding tasks.

Lift TIG

You’ll initiate TIG arc by touching and lifting the electrode with a TIG torch (sold separately); it’s a useful addition when you need cleaner stainless or thin metal work. Note that you’ll have to invest in a TIG torch and possibly filler rods if your work demands TIG-level finish quality.

ARC/MMA/Stick

You’ll find the MMA/Stick mode useful for welding outdoors or in windy settings where shielding gas would blow away. Because the machine supports rods under 1/8 inch, you can handle common stick rods for light structural repairs and farm equipment maintenance.

Materials and thickness you can weld

You’ll be able to weld mild steel, and with a TIG torch you can handle stainless steel; aluminum TIG requires AC TIG capability, which this machine does not advertise. The listed amperage suggests light-to-medium thickness capability, but precise thickness limits aren’t specified by the manufacturer.

Typical thickness expectations

You’ll likely see good results on thin gauge steel up to moderate thicknesses for tack and bead work given the 145A rating, but heavy structural welding will demand higher continuous amperage and better duty cycle numbers. For consistent penetration on thicker sections, you’ll need multiple passes or a machine with higher duty cycles.

Materials compatibility

You’ll weld mild steel and, with the right TIG torch and consumables, stainless steel; aluminum welding is not covered without a suitable AC TIG setup. If you plan to weld galvanized or rusted surfaces, flux-core is forgiving, while MIG with gas gives cleaner beads on prepared surfaces.

Wire, consumables, and accessories

You’ll want to confirm the wire sizes and stock adequate consumables because the product lists a single wire diameter and a 2 lb spool capacity. Sourcing good-quality consumables will directly affect arc stability, feed reliability, and overall weld appearance.

Wire choices

You’ll use the 0.04 inch flux-core wire supplied or sourced to match the feed mechanism, and the machine supports spool capacity for 2 lb coils. If you later switch to MIG with shielding gas, choose wire rated for gas-shielded welding and match the liner and drive rolls accordingly.

Consumable wear items

You’ll need replacement contact tips, nozzles, drive rolls, and possibly liners over time, especially if you run abrasive flux-core wire frequently. Keep spare tips and a replacement drive roll set to avoid downtime in the middle of a job.

Power, duty cycle, and practical limitations

You’ll appreciate the wide voltage input that helps when you work in areas with unstable power, yet the manufacturer does not publish a duty cycle which limits ability to plan long continuous welding tasks. For workshop or occasional field use, the portable nature of the unit may outweigh the lack of a stated duty cycle.

Voltage and current behavior

You’ll enjoy stable operation between 90V and 140V, which reduces interruptions from minor voltage drops. The synergy control helps with adjusting feed speed and voltage but you should still expect the machine to have thermal limits like any compact inverter unit.

Duty cycle and continuous work

You’ll want to ask the seller for a duty cycle figure if you plan to run extended welding sessions, since the absence of that spec means you should assume limited continuous-on time. For hobby projects and intermittent professional tasks, this unit will likely be suitable, but heavy industrial use requires a machine with a specified high duty cycle.

Safety features and best practices

You’ll value the built-in safety protections that include overheat, over-current, over-voltage, and overload protection, which all help reduce machine failure risk. Still, always use proper PPE, ventilation, and grounding practices to protect yourself beyond the machine’s internal safeguards.

Built-in protections

You’ll benefit from automatic protections that shut or limit operation under fault conditions, helping prevent catastrophic failures or fires. These protections are particularly useful if you’re using the machine in remote environments or on mobile jobs where conditions can be unpredictable.

Personal safety practices

You’ll want to wear eye protection, gloves, and appropriate clothing, and set up ventilation when welding flux-core or stick to avoid fumes. Always secure a proper ground and inspect cables for damage before starting work to avoid electric shock or poor arc performance.

Portability and use cases

You’ll find the unit described as compact and light, making it convenient for mobile repair work, farm jobs, small fabrication shops, and hobbyist garages. Its ability to operate down to -15°C makes it suitable for outdoor winter use, assuming you follow cold-weather welding precautions.

Mobile repair and field service

You’ll carry this machine in a truck or van for emergency automotive repairs, farm equipment fixes, or quick site work where bringing a heavy rig is impractical. The included clamps and electrode holder let you handle typical on-site tasks without additional purchases.

Shop and garage use

You’ll appreciate the multi-process capability for a home garage where space is limited and you want flexibility without several machines. It’s a practical choice for metal art, bike frame adjustments, and small fabrication projects.

Advantages (pros)

You’ll value the following benefits when choosing this model for your mix of hobby or light professional tasks. These points reflect what the manufacturer highlights and the pragmatic advantages you can expect.

• Multi-process functionality in one compact unit saves space and cost.
• Synergetic control reduces setup time and helps beginners get usable welds faster.
• Wide input voltage tolerance improves reliability in unstable power conditions.
• Large LCD makes setting parameters easier and more precise.
• Multiple protections (overheat, over-current, over-voltage, overload) enhance safety.

Drawbacks (cons)

You’ll want to keep these limitations in mind before purchasing so you can plan for necessary accessories or accept trade-offs. Being aware of these cons will help you avoid surprises.

• TIG torch not included, so Lift TIG capability requires an additional purchase.
• Duty cycle and machine weight are not specified, which complicates planning for heavy or continuous work.
• Only 2 lb spool capacity may require frequent wire changes for longer jobs compared to full-size units.
• Some specifications (exact wire diameters supported other than 0.04 in, detailed duty cycle) are missing from the listing.

How it compares to typical single-process welders

You’ll see that multi-process units like this cost less than buying three separate machines and offer convenience, but they don’t always match the sustained performance of dedicated single-function welders. If you need consistent high-duty MIG production or professional TIG finishes daily, a specialized machine may outperform this hybrid.

Pros vs single-process machines

You’ll get versatility and portability that single-process machines can’t offer without buying multiple devices, which is ideal for mixed workflows. You’ll save storage space and initial capital.

Cons vs single-process machines

You’ll lose out on specialized performance, duty cycle endurance, and possibly finer control in dedicated operations—especially for high-precision TIG or industrial MIG productivity. If you primarily TIG weld stainless or aluminum, dedicated TIG equipment will generally produce better aesthetics and control.

Who should buy this and who should consider alternatives

You’ll likely be satisfied if you’re a hobbyist, home mechanic, or mobile repair technician who needs flexibility in a compact package. You should consider alternatives if you are a professional welder needing high duty cycles, industrial throughput, or advanced TIG AC capability for aluminum.

Ideal buyers

You’ll want this if you need a portable, all-in-one unit for occasional shop work, repairs, and mobile service calls. It’s a great fit for someone who likes to tinker and wants a single machine for varied tasks.

Who should look elsewhere

You’ll want a different machine if your work requires long continuous welds, heavy plate production, or AC TIG aluminum work, since those needs often outstrip what compact multi-process machines provide.

Tips for getting the best results

You’ll get better welds faster if you follow practical setup and technique tips that match the machine’s strengths. Small adjustments in wire feed, travel speed, and electrode angle can dramatically improve bead appearance and penetration.

• You’ll start with the synergetic mode to get close to a workable setting and then refine manually for your joint specifics.
• You’ll troubleshoot spatter or burnback by checking liner length, drive roll pressure, and contact tip condition.
• You’ll use short runs with cooling pauses to protect the inverter if duty cycle is unknown, avoiding thermal shutdown.
• You’ll practice arc starts and travel techniques on scrap metal to dial in travel speed and stick-out before tackling a project part.

Maintenance and troubleshooting

You’ll want to inspect consumables and wiring regularly to maintain consistent performance because feed systems for flux-core wires can be sensitive to dirt and wear. Proper cleaning, replacement of tips/nozzles, and attention to drive roll alignment will keep the machine reliable.

Routine maintenance

You’ll check contact tips, nozzles, and drive rolls for wear, replace liners as needed, and ensure ventilation ports are free of dust and debris. You’ll keep a maintenance kit handy with spare tips, nozzles, and a basic set of tools.

Common issues and fixes

You’ll fix poor feed or burnbacks by checking spool tension, drive roll settings, and liner cleanliness; inconsistent arc or weak welds may be voltage-related or caused by poor ground connection. You’ll contact seller support for persistent electrical faults or if the built-in protections repeatedly trip.

Frequently asked questions (FAQ)

You’ll find answers to common concerns here so you can make a clearer purchase decision without chasing down every detail.

Q: Is a TIG torch included? A: No, the TIG gun is not included; you’ll need to buy one separately to use Lift TIG.

Q: Can I weld aluminum? A: Not without a dedicated AC TIG capability and a suitable torch; this unit is designed for MIG/flux-core and DC Lift TIG for some stainless with the right accessories.

Q: What wire sizes can it accept? A: The listing specifies 0.04 inch flux-core wire and supports 2 lb spools. Confirm with the seller if you need alternative wire diameters.

Q: Do I need shielding gas for MIG? A: Yes, for true MIG welding with gas you’ll need an external shielding gas cylinder and regulator; flux-core welding doesn’t require gas.

Q: Is the duty cycle specified? A: No, the manufacturer doesn’t list a duty cycle; assume limited continuous-use capability until you get a confirmed spec.

Q: What protections are included? A: Overheat, over-current, over-voltage, and overload protections are stated.

Q: Can it handle outdoor, windy conditions? A: You’ll prefer flux-core or MMA/Stick for windy conditions as shielding gas will be blown away for MIG. Stick welding works well in the field.

Q: How portable is it? A: The machine is described as small and lightweight, suitable for mobile work, but exact weight is not listed.

Q: Can I weld thick steel plates? A: You’ll handle light-to-moderate thickness with multiple passes; for heavy plate welding, a higher-amperage or more industrial machine is recommended.

Q: Is there a warranty? A: Warranty details are not specified in the listing—confirm with the seller prior to purchase.

Final verdict and buying advice

You’ll find the GZ GUOZHI 145A 3-in-1 Soldering Machine a compelling value if you want a portable, multi-process machine for general repairs, hobby projects, and light workshop work. If you need a compact unit that can perform MIG/flux-core, basic MMA/Stick, and occasional Lift TIG (with a separate torch), this model checks a lot of boxes—but make sure you’re comfortable with the missing specs like duty cycle and exact weight.

Buying checklist

You’ll verify duty cycle and weight with the seller if continuous heavy work or transport logistics are important. You’ll also factor in the cost of a TIG torch (if you need TIG), shielding gas/regulator (if you’ll MIG), and extra consumables.

If you want help comparing this unit to specific alternatives or building a shopping list of accessories based on the jobs you plan to do, tell me what kind of projects you weld most often and I’ll put a tailored recommendation together.

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