Tweco 1140-1208 Mig Contact Tip 0.062 in 0.078 Bore 400A

Product Description

The TWECO 1140-1208 is a 14H Series Heavy Duty MIG contact tip designed for high-amperage wire feed welding applications up to 400 amps. Machined from copper alloy tubing, the tip delivers consistent electrical conductivity and a smooth inside diameter bore of 0.078 inches with a tolerance held to plus or minus 0.003 inches. It accommodates 0.062 inch (1/16 inch) wire diameter and measures 1.47 inches in length. The threaded design ensures solid contact with the gas diffuser when installed. Each tip is marked with the part number and wire diameter for quick field identification. Licensed welding technicians and MIG welding professionals install this tip as a consumable replacement on heavy-duty MIG guns.

The 1140-1208 is suited for heavy-duty welding environments where sustained high-amperage output demands reliable consumables. It is compatible with 200 to 400 amp Tweco No. 2, No. 3, and No. 4 MIG guns. The copper alloy construction acts as a heat sink, conducting heat away from the arc source during extended welding cycles. Its thick-walled design increases the electrical conductive surface area between the contact tip and diffuser, supporting better arc stability and tip longevity in demanding shop and fabrication settings.

Key Features

• Machined from copper alloy tubing for consistent, smooth inside diameter surface
• Inside diameter bore of 0.078 inches with plus or minus 0.003 inch tolerance
• Accommodates 0.062 inch wire diameter at up to 400 amps
• Threaded style ensures proper seating and contact with gas diffuser
• Each tip marked with part number and wire diameter for easy identification
• Thick-walled design conducts heat away from arc source, extending tip service life

Compatibility

Designed for use with 200 to 400 amp Tweco No. 2, No. 3, and No. 4 MIG guns as stated by the manufacturer.

Installation Notes

Contact tips are installed and replaced by qualified welding technicians as part of routine MIG gun consumable maintenance. Always power down the welding machine and allow the gun to cool before replacing a contact tip. Use the correct wrench or tip tool to avoid damaging the diffuser threads. Ensure the tip is fully seated and threaded into the gas diffuser before resuming welding operations.

Technical Specifications

• Wire Diameter: 0.062 inches
• Bore Diameter: 0.078 inches
• Tip Length: 1.47 inches
• Inside Diameter Tolerance: plus or minus 0.003 inches
• Maximum Amperage: 400 amps
• Weight: 0.02 pounds
• Material: Copper alloy
• Connection Type: Threaded
• Sold As: Each

Standard Information

• Brand: TWECO
• Manufacturer Part Number: 1140-1208