11601104 - Tweco 16S-45 Heavy Duty Contact Tip, .045 in Wire, 25-Pack

Precision Engineering for High-Amperage MIG Welding

The Tweco 16S-45 Contact Tip (Part No. 1160-1104) represents the standard of excellence for heavy-duty MIG welding consumables. Engineered specifically for the 16 Series platform, this contact tip is manufactured from extruded or gun-drilled 122 DHP (Deoxidized High Phosphorus) copper alloy. This specific alloy selection is critical for industrial applications, as it offers an optimal balance of electrical conductivity and thermal diffusivity. By efficiently conducting welding current to the wire while simultaneously dissipating heat away from the arc zone, the 16S-45 minimizes the risk of overheating and premature failure during prolonged welding cycles.

Dimensional accuracy is a hallmark of the Tweco 16 Series. The 16S-45 features a nominal inner diameter (ID) of 0.054 inches, designed to accommodate 0.045-inch (1.2 mm) welding wire with a strict tolerance of +/- 0.003 inches. This precision is achieved through advanced machining of copper alloy tubing, resulting in a consistent and smooth interior surface. A smooth ID is paramount for reducing friction in the wire feed path, thereby preventing bird-nesting and ensuring stable arc characteristics. The tip's outer diameter of 0.375 inches and length of 1.5 inches provide substantial mass, acting as an effective heat sink in applications ranging from 350 to 600 Amperes.

The mechanical interface of the 16S-45 utilizes a standard M8 x 1.25-6g thread. This threaded design ensures a positive lock with the gas diffuser, maximizing the surface contact area for electrical transmission. Unlike slip-on designs that may suffer from intermittent contact due to thermal expansion, the threaded connection maintains a secure electrical path, reducing resistance and voltage drop at the contact point. This tip is compatible with Tweco Spray Master® and Tweco No. 6 MIG guns, making it a versatile component for fabrication shops utilizing standard Tweco platforms. Each tip is clearly stamped with its part number and wire diameter, facilitating rapid identification and inventory management in busy industrial environments.