TWECO Liners

Conduit liners for Tweco-pattern MIG guns: steel liners with brass nipples for No.4 and No.5 guns, Cigweld conduit liners in 4.5 m and 7.6 m lengths for the Tweco 2 and 4, nylon liner options for 1.6 mm wire, and long 8.3 m steel liners for the No.5. Wire ranges from 0.8–0.9 mm up to 2.4 mm are covered, with Tweco-style alternatives from North Welding Products.

How do I choose the right Tweco liner?

Three checks: the gun series (2, 4 or 5), the wire size range stamped in the listing, and the length — the liner must run the full lead, so match it to your torch length (4.5 m covers a standard 3.6 m gun). Steel suits hard wire; nylon is listed for applications that need a smoother feed.

Liners are a frequent reorder for WeldCo's Melbourne and Adelaide fabrication customers, so common sizes stay in the range.