407002-009 - Tweco V-Groove Drive Roll .030-.035/.045 for Fabricator Series

Technical Overview of the Tweco 407002-009 Drive Roll

The Tweco 407002-009 is a precision-engineered drive roll designed for the wire feed systems of the Thermal Arc and Tweco Fabricator series welders. This component is critical for the accurate and consistent delivery of welding wire to the MIG gun. The roll features a dual-groove design, making it a versatile solution for shops that utilize multiple wire diameters. One side of the roll is machined with a V-groove sized for .030-inch (0.8mm) to .035-inch (0.9mm) wire, while the opposing side features a V-groove sized for .045-inch (1.2mm) wire. This reversibility reduces inventory requirements and simplifies machine setup.

Constructed from high-grade hardened steel, this drive roll is built to withstand the friction and mechanical stress of continuous industrial welding. The V-groove geometry is specifically selected for solid wires, such as mild steel (ER70S-6) and stainless steel (ER308/309/316). Unlike knurled rolls which bite into the wire, the smooth V-groove provides necessary traction through surface contact friction without deforming the wire or creating metal shavings that can clog liners. This ensures the wire retains its round profile for optimal electrical contact at the contact tip.

Compatibility is key for maintenance and repair operations. The 407002-009 is the OEM replacement part for the Fabricator 181i, 211i, and 252i multi-process welding machines. Proper tensioning of this drive roll is essential; the hardened surface interacts with the pressure roll to push the wire through the gun cable. Technicians should verify the wire diameter matches the side of the roll facing inward to prevent feeding issues. This part is identified by the internal SKU TWE407002-009 and is a standard stock item for maintaining the operational efficiency of Tweco wire feeders.