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Tweco® Updates Velocity™ MIG Consumables Design;  Shielding Gas Nozzle Now Screws Directly To Threaded Conductor Tube

November 6, 2017

Florence, S.C. – Tweco®, an ESAB brand, has simplified and improved the front-end consumables for its Spray Master™ and Tweco Classic Number Series MIG guns featuring Velocity™ MIG welding consumables. The new nozzle features a heavy-duty, high-temperature resin and a molded insert that enables the nozzle to screw directly onto threads machined on the conductor tube. In addition to better securing the nozzle, the new design reduces the operating temperature of the nozzle and conductor tube. To reduce the effect of reflective heat, the conductor tube features a high-temperature silicone tube covering. The sleeve also protects the jacket from impacts and helps extend the conductor tube life.

Jeff Henderson, ESAB's Global Business Manager for Torches and Exothermic Cutting Systems, explains that good thermal management of front-end consumables improves performance, extends consumable life and optimizes the electrical and thermal conductive path, which greatly influences MIG gun performance.

"The updated Velocity design directly addresses heat-related issues by reducing consumable count, improving thermal conductivity and lowering operating temperature. As a result, updated Velocity consumables stay cooler, last longer, produce a more stable weld puddle and improve overall weld efficiency," says Henderson.

Velocity consumables feature threadless, "drop-in" style contact tips and integrate the contact tip seating area directly into the conductor tube. With medium- and heavy-duty Velocity consumables, the shielding gas flows from the conductor tube through four ports machined into the base of the contact tip. This simplified design eliminates the gas diffuser and enables the shielding gas to keep the tip up to 30 percent cooler. By running cooler, Velocity MIG consumables improve parts life by up to 500 percent or more in gas shielded Flux-Cored, spray transfer and pulsed spray transfer applications. In short circuit MIG applications, Velocity consumables typically last two to three times longer than conventional consumables.

A cooler tip also reduces the ability for spatter to stick. The tip needs less cleaning, and any spatter that adheres is easier to remove. Further, spatter generally collects on one part, the nozzle, as opposed to three parts on conventional MIG front ends.

"The drop-in style tip also eliminates the hassle associated with burn backs. There's no need to use vice-grips or welpers when the electrode fuses inside the tip," adds Henderson.

Tweco MIG Guns

The Tweco Classic Numbered Series is an enhancement of the legendary Tweco Number Series, perhaps most popular air-cooled MIG guns in the world since their introduction more than 40 years ago. Many operators prefer the paddle-shaped Tweco Classic handle because it can reduce hand stress in applications where the operators desire more side-to-side gun manipulation. For operators who prefer a narrower, rounded handle shape or a water-cooled gun option, Tweco offers the proven Spray Master Series.

ESAB Welding & Cutting Products, established in 1904, is a recognized leader in the welding and cutting industry. From time-honored processes in welding and cutting to revolutionary technologies in mechanized cutting and automation, ESAB's welding filler metals, equipment, and accessories bring solutions to customers around the globe. For more information about ESAB and its leading brands, visit or call 1-800-ESAB-123.
Tweco Velocity consumables
Tweco Velocity consumables, available on Tweco Classic and Spray Master MIG guns, now
feature a redesigned conductor tube connection.

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