11401203 - Tweco 14-40 Contact Tip 0.040-Inch (Pack of 25)

Technical Overview of Tweco 14-40 Contact Tips

The Tweco 14-40 (Stock No. 1140-1203) is a standard duty contact tip designed specifically for use with 0.040-inch (1.0mm) solid or flux-cored welding wires. Part of the widely utilized 14 Series, this contact tip is engineered to fit Tweco Professional No. 2, No. 3, and No. 4 MIG guns, as well as the Spray Master series. The tip features a standard 1/4"-28 UNF thread, ensuring a secure electrical and mechanical connection to the gas diffuser.

Manufactured from a high-grade copper alloy, the 14-40 tip offers excellent thermal and electrical conductivity. This material composition is critical for minimizing resistance heating at the contact point, which prolongs the life of the tip and maintains consistent current transfer to the wire. The internal bore is precision-drilled to tight tolerances, providing optimal wire contact without causing excessive drag or feeding issues. This balance is essential for maintaining a stable arc and reducing micro-arcing inside the tip.

This package contains 25 contact tips, making it an ideal inventory unit for industrial environments where consumable turnover is frequent. The 14 Series design is a staple in the welding industry, known for its reliability in general fabrication, automotive, and heavy equipment repair applications. Users should verify that their gas diffuser is compatible with 14 Series tips (typically part numbers 52, 52-23, 54A) before installation.