Tweco 1140-1243 Contact Tip 0.040 Inch Mig Welding

Product Description

The TWECO 1140-1243 is a heavy-duty MIG welding contact tip machined from copper alloy tubing to deliver a consistent, smooth inside diameter surface. Designed for 0.040-inch wire diameter, the tip maintains an inside diameter tolerance of plus or minus 0.003 inches, ensuring reliable arc stability and consistent wire feed. Each tip is marked with the part number and wire diameter for fast, accurate identification in the field. This is a threaded-style tip intended for use with a compatible gas diffuser on a MIG gun, and is typically installed by welding professionals during routine tip replacement or gun setup.

The 1140-1243 is suited for MIG welding applications requiring precise wire-to-tip contact and stable electrical conductivity. Its copper alloy construction supports excellent electrical transfer properties, making it appropriate for production welding environments as well as general fabrication work. The threaded design ensures a secure, positive connection with the gas diffuser when installed to the MIG gun. This tip is compatible with the Eliminator-style gas diffuser system and is available in both threaded and twist-lock Eliminator contact tip configurations within the Weldskill product line.

Key Features

• Machined from copper alloy tubing for consistent inside diameter surface finish
• Inside diameter tolerance held to plus or minus 0.003 inches for accurate wire guidance
• Heavy-duty 0.040-inch wire diameter rating
• Threaded style ensures secure contact with gas diffuser on MIG gun installation
• Compatible with Eliminator-style gas diffuser systems
• Each tip marked with part number and wire diameter for easy field identification

Compatibility

Compatible with Eliminator-style gas diffusers. Fits threaded and twist-lock Eliminator-style contact tip configurations within the Weldskill MIG gun system. Verify diffuser style and wire diameter before installation.

Installation Notes

Contact tip replacement is performed by welding technicians as part of routine MIG gun maintenance. Always disconnect or power down the welding machine before removing or installing a contact tip. Use appropriate pliers or a tip removal tool to avoid damaging the diffuser threads. Do not overtighten the threaded tip, as this can distort the inside diameter and affect wire feed performance.

Technical Specifications

• Wire Diameter: 0.040 inches
• Inside Diameter Tolerance: plus or minus 0.003 inches
• Connection Style: Threaded
• Material: Copper alloy
• Length: 1.5 inches
• Width: 0.3 inches
• Weight: 0.03 pounds
• Unit of Measure: Each

Standard Information

• Brand: TWECO
• Manufacturer Part Number: 1140-1243