Tweco 1140-1213 Mig Contact Tip 0.046 in 25 Pack

Product Description

The TWECO 1140-1213 is a heavy-duty MIG welding contact tip rated for use up to 400 amps. It is designed for 3/64 inch (0.046 inch) wire with a 0.059 inch nominal inside diameter bore and a 0.283 inch outside diameter. The tip measures 1.47 inches in length and is threaded with a 1/4 inch-28 UNF-2A thread. Machined from extruded or gun-drilled 122 DHP copper alloy tubing, it delivers consistent inside diameter surface finish held to a tolerance of plus or minus 0.003 inches. This tip is sold in packs of 25.

This contact tip is suited for heavy-duty welding applications up to 400 A, including aluminum wire welding. It is compatible with 200 to 400 A Tweco No. 2, No. 3, and No. 4 MIG guns. The threaded style tip seats properly against the gas diffuser when installed, making it appropriate for both slip-on and thread-on nozzle configurations. It is typically used by professional welders and MIG gun technicians in demanding industrial and fabrication environments.

Key Features

• Rated for heavy-duty MIG welding up to 400 A, including aluminum wire applications
• Machined from 122 DHP copper alloy tubing for consistent bore surface with plus or minus 0.003 inch tolerance
• Thick-walled design acts as a heat sink, drawing heat away from the arc source
• Twist-lock design locks the tip in place against the gas diffuser without relying on threads for retention
• Quarter-turn clockwise rotation exposes a new wear point, effectively doubling the service life of each tip
• Part number and wire diameter marked on each tip for easy field identification
• Sold in packs of 25

Compatibility

Compatible with 200 to 400 A Tweco No. 2, No. 3, and No. 4 MIG guns. Fits slip-on and thread-on nozzle configurations using a 1/4 inch-28 UNF-2A thread size.

Installation Notes

Welders and MIG gun technicians should de-energize and allow the gun to cool before replacing contact tips. The threaded tip should be seated firmly against the gas diffuser to ensure proper electrical contact. When the initial wear point is reached, twist the tip a quarter turn clockwise to expose a new wear point rather than replacing immediately. Do not over-tighten, as this may damage the diffuser threads or restrict proper seating.

Technical Specifications

• Wire Size: 0.046 inches (3/64 inch)
• Bore Inside Diameter: 0.059 inches nominal
• Outside Diameter: 0.283 inches
• Length: 1.47 inches
• Thread Size: 1/4 inch-28 UNF-2A
• Current Rating: 400 amps maximum
• Material: 122 DHP copper alloy
• Inside Diameter Tolerance: plus or minus 0.003 inches
• Package Quantity: 25 per pack
• Weight: 0.03 pounds

Standard Information

• Brand: TWECO
• Manufacturer Part Number: 1140-1213