How to Clean A MIG Welder Liner

Keeping your welding tools in top shape could be a difference-maker, particularly in challenging operations.

MIG welding ranks as one of the top processes for merging metal together, making it ideal for versatile use. MIG welders have a lot of parts put together to enable seamless metal-merging support.

Aside from regular maintenance, knowing how to clean a MIG welder liner is crucial for the best metalwork experience.

In this post, you’ll get the correct details on MIG welder liners and how to achieve smoother maintenance for standard operation. Also, essential details targeted at getting you the know-how for seamless liner cleaning is in this piece.

When you get the hang of what this piece offers, undoubtedly, you’ll get your MIG welding running without hassle!

What is a MIG Welder Liner?

MIG welder liners are tubes that allow welding wire to pass through from feeder to contact tip. MIG welder liners also feature designs to allow smooth welding paths by keeping fed wire easy to control.

What is the Function of a MIG Welder Liner

MIG welder liners are designed to aid easy gliding of feeder wire through a welding nozzle. MIG welder liners also help smooth transmission of wire through the welding to contact tips for easier merging.

Welder liners are important because, without these add-ons, your gun can’t weld anything properly.

Types of MIG Welder Liner

Aside from welding liners coming in with different gauges, welders can choose between the two main types available;

Steel-Coated Teflon Liner

Steel-coated Teflon liner is ideal for feeding steel wire. The liner features designs focused on smoother flexibility and welding path support for steel-based processes.

The liner is also suitable for mild-steel welding processes and could support cast iron merges too. It offers more drag potential than other feeders, making it ideal for spot and slow welding processes.

If you’re planning to weld two thick steel pieces together, this liner is a brilliant choice.

Aluminum MIG welding liner

MIG welding aluminum requires fluid wire feeding for optimal results. And that’s where these liners come in. Aluminum welder liners are designed to allow smoother wire transmission and lesser drag.

How Do Welding Liners Get Dirty

Irregular cleaning

Not maintaining a strict cleaning regime of your MIG welding parts isn’t ideal. Cleaning your welding liner in a not-too-often fashion increases its chances of picking up dirt.

When your liner isn’t cleaned regularly, it could develop enough gaps to hold dirt from the fed wire. Abandoning the liner further could result in obvious stutters and poor weld quality.

Bending wire and line

Bending your line and fed wire in an unnatural fashion could create spaces for debris to hang onto during welding. The debris in this liner results in a build-up of dirt capable of hampering your welds.

Accumulation of metal fragments

Metal fragments accumulated around your welder liner are a direct result of feeding wire residue.

Some welding liners that aren’t installed properly may scrape off some parts of the feeder wire. When the wire build-up becomes excessive, there’s a high chance of this residue stunting your weld quality.

Perks of a Clean MIG Welder Liner

  • Smoother welding support
  • Lesser stuttering
  • Limited chances of fragment buildup
  • Minimal grime clogging

How to Clean a MIG Welder Liner: Step-by-Step Guide

Unscrew liner nut

A nut holds your welding liner in place onto the tip. Gain access to the liner by using a spanner to unscrew this nut.

Blow outliner

Compressed air is the gold standard for clearing out dirt and debris from a welding liner. Metal fragments, grime, and other lingering dirt could be eliminated with a few bursts of air.

Inspect liner for any problems

Aside from unscrewing your liner and blowing it out, you need an in-depth inspection of its condition.

Liners with noticeable cracks or molds within are not ideal choices for re-use. Consider repairing any kinks you notice. But if it’s getting out of hand, think about replacing the liner altogether.

Return liner to weld gun

After checking out everything in the liner’s fine, return it to the welding gun and continue your join operation.

What Determines Your Choice for a MIG Welder Liner

Filler metal you intend to use

Differences in filler metal could require a special type of liner for stellar welding results. For example, aluminum liners support fluid operation and are designed to limit spattering with their smoothed rims.

MIG gun specifications

There are different types of MIG welding guns, and each has peculiar features and modes of installation. Your choice for a MIG welder liner should rest on what kind of gun you’ve got available for the process.

Points to Consider before Buying a MIG Welder Liner

Size of liner

MIG welder liners come in two sizes;

Small diameter (.23” – .45”)

Relatively lower in durability and susceptible to break with ease, small diameter liners are used for light welding operations.

These liners are ideal for filling gaps left around worn-out tips for a snug fit. Using such liners with flimsy tubing could result in gaps that could pack up dirt and stunt your welding operation.

Medium to large sizes (.45”+)

Ideal for fitting in a wider range of tubes for seamless welding support, these liners offer enhanced longevity support. But there’s a downside to some of these liners.

It could happen that some of these liners become open to strain when used for long periods without maintenance.

Brand of liner

Personal preferences and brand quality are other important factors to consider before ordering a welding liner.

Cheap welder liners could offer inferior feeder wire support over time, as some come with substandard materials. Consider spending more when it comes to welding liners, as most of these tubes come at a bargain.

Length of liner

Welder liners are available in 10ft, 12ft, 15ft, and higher options. Selecting a liner based on its length avails more room to get a better distance during MIG welding operations. Also, flexibility is easier to manage when you’ve got a longer liner hooked to your tube.

Problems that a Bad Welding Liner May Cause

Stuttering wire feeding

Stutters could be inimical to your smooth welding potential. Bad welding liners are a top candidate that enhances stutters in your welding processes.

Stuttering welds result in the abysmal flow of fillers across your weld pool. Without the weld pool getting a complete lining, holes could be common throughout your join.

Holes in your join could lead to easy breakage. And if these welds support heavy loads, the holes could be damaging.


Bad welding liners could increase the chances of clogging around your liner’s tip. Clogged liners could impede smooth wire feeding support and result in underwhelming weld quality.

Quick dirt build-up

Improper installation of welding liners could result in significant dirt build-up. Twisting your liner during trimming may cause it to fall short of the fitting, and cause easier grime build-up.

How to Eliminate Spatter during MIG Welding

  • Clean your welding liner, replace if possible
  • Compare welding technique in line with weld pieces
  • Check nozzle interior for kinks and other forms of dents
  • Scrape, replace, or clean rusted and dirty feeder wire
  • Inspect your tip for contaminated materials
  • Look at the welding feeder for any obstacles likely to cause dents
  • Replace damaged welding feeder parts
  • Angle your welding gun at a 5° – 15° vertical angle.


What causes a MIG welder to sputter?

Aside from electrical trouble, a dirty liner on your welder could cause significant sputter. Poor weld quality is a direct result of sustained sputtering and could be deadly, particularly for sensitive welds.

Is it easy to clean a MIG welder liner?

Cleaning a MIG welder liner is easy, as you can get the process rounded off in simple steps.

Can kinks impede my MIG welding quality?

Kinks on your welding liner could result in underwhelming MIG welds. On most occasions, it’s better to replace a kinked-up liner than try to repair it.

How can I put a liner on a MIG gun?

  • Pull old liner out from the back end of the MIG gun
  • Keep some liner for fitting tip ends

Final Word

A clean liner is essential for getting the best MIG welds. Without the right liner, an underwhelming metal-joining operation is more likely.

If you’re on a budget or in the midst of a welding emergency, cleaning your liner could be job-saving. But if you can spare taking some time off to get a new liner, it’s the best course.

Liners aren’t designed to last forever, and they’re mostly cheap anyways. Before checking out a welder liner, consider the buying info this piece provides above.