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8-4011 - Thermal Arc 8-4011 MIG Gun Conduit Liner

Packaging: pack of 1
$274.67/EA $174.31/pack of 1 only $174.31/EASave 37%

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OVERVIEW

Smooth Feeding with the Thermal Arc 8-4011 Liner

Is your MIG gun sputtering, stuttering, or feeling like the wire is dragging? It might be time to replace your liner. The Thermal Arc 8-4011 Replaceable Liner is the fix you need to get back to laying down smooth beads. The liner is the backbone of your wire delivery system; it’s the highway your welding wire travels down to reach the puddle. When that highway gets clogged with dirt, rust, or metal shavings, your wire feed becomes inconsistent, leading to frustrating burn-backs and an unstable arc. Swapping out an old, kinked, or dirty liner for a fresh 8-4011 can make an old torch feel brand new again.

Designed for durability and performance, this steel liner is built to handle the twists and turns of daily welding work. Whether you are fabricating in the shop or doing repairs in the field, you need a liner that won't collapse or bind up when you manipulate the gun. The 8-4011 offers excellent support for the wire, preventing it from buckling inside the cable. This is especially important when using softer wires or working with longer gun cables where friction is the enemy. Regular replacement of your liner is one of the cheapest and most effective ways to prevent downtime and frustration.

Installation is straightforward for experienced welders. Simply remove the old liner, slide the new 8-4011 into the back of the gun, and trim it to the correct stick-out length for your specific setup. Don't let a $20 part ruin a day's worth of welding. Keep a spare Thermal Arc 8-4011 in your toolbox so you are always ready to tackle feed issues the moment they arise. This part is essential for anyone running Thermal Arc equipment who demands consistent, reliable performance from their MIG welder.

Why Welders Choose This Liner:

  • Reliable Feeding: Stops the annoying stick-slip behavior of the wire.
  • Easy Fix: A quick maintenance task that solves major arc quality issues.
  • Tough Build: Resists kinking and crushing during normal use.
Additional Information
Brand:Thermal Arc
Product Type:MIG Gun Liner
Packaging Description:1 Per Ea
Part Number:8-4011
Reference Number:47X1581
Component Type:Conduit Liner

INCLUDED

  • 1 x Thermal Arc 8-4011 Replaceable Liner

APPLICATIONS

  • MIG (GMAW) Welding
  • Flux-Cored (FCAW) Welding
  • General Fabrication
  • Automotive Repair
  • Industrial Maintenance
  • Structural Steel Welding

FAQ

The liner acts as a guide conduit for the welding wire, protecting it as it travels through the MIG gun cable and ensuring smooth, consistent feeding to the contact tip.

Signs include erratic wire feeding, the wire slipping at the drive rolls, arc instability, or if the wire is difficult to push through the gun by hand when the tension is released.

Yes, replacement liners are typically supplied longer than necessary and must be measured and trimmed to the exact length required by your specific MIG gun model during installation.

This is a steel wound liner. For aluminum welding, it is generally recommended to use a Teflon or nylon liner to prevent shaving the soft aluminum wire and to reduce friction.

The reference number 47X1581 is an internal manufacturing or specification code used to identify the specific dimensions and material properties of this liner assembly.

It depends on usage. Heavy industrial users might change it weekly or monthly, while hobbyists might only need to change it once a year. Replace it whenever feed issues persist despite changing contact tips.

Absolutely. A dirty liner increases friction, causing inconsistent wire speeds. This leads to an unstable arc, potential burn-back, and poor weld bead appearance.