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How to Convert Mig Welder to Tig?

Welding is a crucial process in metal fabrication, and there are various techniques available to accomplish this task. Two popular methods are MIG (Metal Inert Gas) and TIG (Tungsten Inert Gas) welding. While MIG welding is known for its efficiency and ease of use, TIG welding offers superior control and precision. However, purchasing a separate TIG welder can be costly. In this article, we will explore the process of converting a MIG welder to a TIG welder, allowing you to expand your welding capabilities and save on equipment costs.

Understanding the Differences Between MIG and TIG Welding

MIG welding involves using a consumable wire electrode and a shielding gas to create an arc that melts the workpiece and the filler material, forming a weld. It is commonly used for thicker materials and provides fast and efficient results. On the other hand, TIG welding utilizes a non-consumable tungsten electrode to create an arc, and a separate filler material is manually fed into the weld. TIG welding offers precise control over the heat and allows for welding thinner materials with superior aesthetics and quality.

Benefits of Converting a MIG Welder to a TIG Welder

Cost savings: By converting your existing MIG welder to a TIG welder, you can save money compared to purchasing a separate TIG welding machine. This is particularly beneficial if you already have a MIG welder and need occasional TIG welding capabilities.

Enhanced versatility: Converting your MIG welder to a TIG welder expands your welding capabilities, allowing you to work with a broader range of materials, including aluminum, stainless steel, and other exotic metals. TIG welding also enables you to achieve finer welds and perform intricate welding tasks.

Fine control and precision: TIG welding provides superior control over the welding process. The foot pedal control allows you to adjust the amperage and heat input precisely, resulting in high-quality welds with minimal distortion.

Necessary Components and Equipment for the Conversion

To convert a MIG welder to a TIG welder, you will need the following components:

TIG torch: The TIG torch is specifically designed for TIG welding and features a non-consumable tungsten electrode, gas nozzle, and a collet to hold the tungsten electrode securely.

Gas regulator: TIG welding requires a flow of shielding gas, such as argon or a mixture of argon and helium. A gas regulator ensures a consistent and controlled flow of gas during the welding process.

Gas solenoid valve: This valve controls the flow of shielding gas to the TIG torch. It is activated when the welding circuit is established.

Remote amperage control: A foot pedal or hand-controlled amperage control allows you to adjust the welding current while welding, providing precise control over the heat input.

Step-by-Step Guide to Converting a MIG Welder to a TIG Welder

Preparation and safety measures: Ensure that you have a clear workspace, proper ventilation, and necessary safety equipment, including gloves and eye protection. Disconnect the power source and let the welder cool down before proceeding.

Disassembling the MIG welding gun: Remove the MIG welding gun and any unnecessary components, such as the wire feed assembly and the gas nozzle.

Installing the TIG torch: Mount the TIG torch in the welding machine, ensuring a secure connection. Connect the gas hose to the gas solenoid valve and the torch.

Adjusting the welder settings: Adjust the welder settings according to the manufacturer’s recommendations for TIG welding. Set the welding current range and switch the polarity to DC for most TIG welding applications.

Testing and troubleshooting: Before starting your first TIG weld, perform a test run to ensure that the gas flow, amperage control, and other settings are functioning correctly. Adjust as needed and troubleshoot any issues that arise.

Tips and Best Practices for Using a Converted TIG Welder

Proper techniques and considerations: Familiarize yourself with TIG welding techniques, such as electrode positioning, torch angle, and filler rod manipulation. Practice on scrap metal before working on actual projects to improve your skills.

Safety precautions and protective equipment: TIG welding produces intense UV radiation and heat. Ensure you wear appropriate safety gear, including welding helmet, gloves, and protective clothing. Maintain a safe working environment to prevent accidents.

Common challenges and how to overcome them: TIG welding has its challenges, such as controlling the arc length, avoiding contamination, and achieving proper heat input. Practice patience and seek guidance from experienced welders to overcome these challenges.

Maintenance and care for the converted TIG welder: Regularly inspect and clean your TIG torch, replace consumables, and ensure that gas lines are clear of any obstructions. Perform routine maintenance as recommended by the manufacturer to prolong the life of your converted TIG welder.


Converting a MIG welder to a TIG welder opens up a world of possibilities, allowing you to work with a wider range of materials and achieve superior weld quality. By following the step-by-step guide and implementing best practices, you can successfully convert your MIG welder into a versatile TIG welding machine. Embrace the newfound capabilities, experiment, and refine your skills to excel in the art of TIG welding while saving costs on purchasing a separate TIG welder.

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