Skip to Main Content
Canadian
Canadian owned and operated

14001123 - Tweco 42-40-15 MIG Gun Liner .035-.045 15ft

Packaging: pack of 1
$65.40/EA $40.10/pack of 1 only $40.10/EASave 39%

Usually ships within 3-5 business days

OVERVIEW

Tweco 42-40-15 MIG Gun Liner (.035-.045 Wire)

Keep your welding operations running smoothly with the Tweco 42-40-15 Conduit Liner (Stock Code: 1400-1123). Designed as a direct replacement for 15-foot Tweco MIG guns, this liner is an essential consumable for welders running standard mild steel or flux-cored wires. It is sized perfectly for wire diameters ranging from 0.035 inches to 0.045 inches, covering the most common applications in general fabrication and manufacturing.

The liner is manufactured from spirally wound, zinc-plated music wire. This construction provides the necessary rigidity to prevent the liner from collapsing while maintaining enough flexibility to navigate the cable assembly. The zinc plating acts as a lubricant and a rust inhibitor, ensuring that the wire slides effortlessly through the gun cable. This reduces the load on your wire feeder motor and helps prevent the dreaded "burn-back" caused by feed interruptions.

Compatibility and Specs

This 42 Series liner is the standard fit for many legendary Tweco models. If you are using a Tweco Spray Master 250, 350, or 450, or a Classic Number 2, 3, or 4 gun with a 15-foot cable, this is the correct replacement part. It can also be trimmed to fit shorter cables if necessary, following standard maintenance procedures.

Specifications:

  • Part Number: 42-40-15
  • Stock Number: 1400-1123
  • Wire Capacity: .035" - .045"
  • Length: 15 Feet (approx. 4.5 meters)
  • Material: Steel (Not for Aluminum)

Don't let a clogged or damaged liner compromise your weld quality. Replace it with genuine Tweco parts for guaranteed fit and performance.

Additional Information
Brand:Tweco
Packaging Description:1 Per Ea
Wire Diameter:0.035", 0.045"
Length:15 ft
Part Number:42-40-15
Series:42 Series
Material:Zinc Plated Spring Wire
Compatible Guns:Tweco Spray Master, Tweco Classic No. 2, Tweco Classic No. 3, Tweco Classic No. 4

INCLUDED

  • 1 x Tweco 42-40-15 Conduit Liner (15 ft)
  • Installation Instructions

APPLICATIONS

  • General Fabrication
  • Structural Steel Welding
  • Automotive Repair
  • Heavy Equipment Manufacturing
  • Shipbuilding

FAQ

This liner is designed for wire diameters from .035" (0.9mm) to .045" (1.2mm).

No, this is a steel wound liner. For aluminum welding, you should use a Teflon or Nylon conduit to prevent wire shaving and friction.

The liner is 15 feet long, suitable for 15ft MIG gun cable assemblies.

It fits Tweco Spray Master 250/350/450 and Tweco Classic No. 2, 3, and 4 guns, as well as other guns using 42 series liners.

Signs include erratic wire feeding, the wire slipping at the drive rolls, or the wire sticking inside the gun cable.

Yes, this is a genuine Tweco 1400-1123 (42-40-15) replacement part.

Yes, if you have a 10ft or 12ft gun, you can trim this 15ft liner to the correct length during installation.

It is made of zinc-plated spring steel wire.