This detailed product description refers to the high-quality PTFE (polytetrafluoroethylene) welding torch liner offered by Wieländer+Schill, developed specifically for MIG-MAG welding applications. This component is essential for ensuring stable and reliable wire feeding, especially for aluminum and stainless steel welding wires.
Product Identifier: 337142
The PTFE liner with item number 337142 is a critical consumable part located inside the welding torch cable. Its main function is the precise and frictionless guidance of the welding wire from the feeder to the welding point. The red color version indicates specific compatibility and sizing.
The PTFE material is highly resistant to heat and chemical effects, and thanks to its extremely low coefficient of friction, it minimizes wire jamming, which is particularly important for softer aluminum wires. Stable wire feeding is essential for the quality of the welding process, a good weld seam, and maintaining productivity. The manufacturer therefore recommends regular replacement of the liners for continuous optimal performance.
This specific model is ideally suited for 1.0 mm and 1.2 mm diameter aluminum and stainless steel welding wires. The 3.5-meter length allows for flexible installation in most standard MIG-MAG torch cables.
Superior Wire Feeding: The PTFE inner surface guarantees minimal friction, preventing wire breakage or jamming, especially with long cables.
Material Compatibility: Specifically recommended for aluminum and stainless steel wires, where conventional steel or bronze liners do not provide the necessary smooth passage.
Long Lifespan: The high-quality plastic (PTFE) ensures the component's resistance to the thermal load and mechanical stress experienced by the wire during the welding process.
Easy Maintenance: Liner replacement allows for a quick and simple intervention during welding equipment maintenance.
Color Coding: The red color aids in quick identification in the workshop, making it easier to select the replacement part of the correct size and material.
The table below summarizes the key technical parameters of the PTFE liner:
| Property | Value | Note |
|---|---|---|
| Part number | 337142 | Unique Identifier |
| Product Type | PTFE Liner | Wire Guide Tube |
| Application Area | MIG-MAG Welding | Gas-shielded Arc Welding |
| Length | 3.5 meter | By torch cable length |
| Color | Red | Manufacturer Marking |
| Compatible Wire Diameter | 1.0 mm and 1.2 mm | Precise Sizing |
| Compatible Wire Materials | Aluminum and Stainless Steel | Special Surface Treatment |
| Material | Plastic (PTFE) | Excellent Friction Properties |
The reliability of the welding wire feeding system directly depends on the condition of the inner liner. The continuous movement of the wire and the frequent bending of the welding torch cause wear on the PTFE inner surface over time. Wear increases friction, leading to uneven wire feeding, arc instability, sparking, and ultimately, degradation of the welding quality.
To maintain stable wire feeding, the manufacturer strongly recommends regular inspection and replacement of the PTFE liners as needed.
This product is part of the professional welding technology range from Wieländer+Schill, which guarantees quality and reliability according to industrial standards.
For maximum system integrity and sealing, accessory parts for the PTFE liners are also available:
| Accessory Product | Part number | Description |
|---|---|---|
| O-ring for PTFE liners | 337143 | Necessary for securing the liner and sealing the gas. |
To cover the wide range of user requirements, Wieländer+Schill also offers liners with different specifications:
PTFE Liner ALU | 4.5 m | Red (Part Number: 337015): A longer 4.5 m version, also for 1.0 mm and 1.2 mm diameter aluminum/stainless steel wires.
PTFE Liner ALU | 3.5 m | Red, with copper spiral (Part Number: 337108): This 3.5 m black plastic liner features a built-in 22 cm copper spiral. It is specifically recommended for MIG soldering, for wire diameters of 1.0 mm and 1.2 mm. The copper spiral provides additional rigidity and better guidance.
Polyamide Plastic Liner | 3.5 m | Black (Part Number: 337147): This PA (Polyamide) liner is specifically made for aluminum wires with diameters of 0.8 mm and 1.0 mm. The polyamide material offers different mechanical properties than PTFE.
These accessory options allow the welder to precisely adjust the inner guidance system according to the type of wire used, the length of the torch cable, and the welding technology (e.g., soldering or conventional MIG).
