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The Tweco 1420-1142 (Model WS42N-3545-15) is a specialized nylon conduit designed for the WeldSkill series of MIG guns. Unlike standard steel wound liners, this conduit is manufactured from durable, low-friction nylon material. This design is critical when feeding soft welding wires, particularly aluminum (4043 or 5356 alloys), which are prone to micro-shaving and buckling when forced through steel coils. The smooth interior surface of the nylon tube ensures consistent wire delivery speed and minimizes drag, directly contributing to stable arc characteristics and reduced downtime caused by feed failures.
This specific liner is sized for 15-foot cable assemblies and accommodates wire diameters ranging from 0.035 inches to 0.045 inches. It serves as a direct replacement for the original equipment in Tweco WeldSkill guns configured for aluminum applications. Proper maintenance of the wire feed path is essential for industrial MRO operations; replacing a contaminated or incorrect liner with this nylon variant is a standard procedure for converting a MIG setup from steel to aluminum. The conduit includes the necessary back-end fittings for secure seating within the power pin or machine adapter.
Technical Specifications:
| Additional Information |
|---|
| Brand:Tweco |
| Item:Liner |
| Length:15 ft |
| Wire Size:0.035" - 0.045" |
| Wire Type:Aluminum |
| Material:Nylon |
| Series:WeldSkill |
| Part Number:WS42N-3545-15 |
| Packaging Description:pack of 1 |
