Tweco 1140-1101 Mig Contact Tip 0.030 in 25 Pack

Product Description

The TWECO 1140-1101 is a 14 Series standard duty MIG contact tip designed for 0.030 inch wire with a 0.038 inch nominal bore diameter. It measures 1.5 inches in length and is machined from 122 DHP copper alloy tubing, providing a consistent, smooth inside diameter surface held to a tolerance of plus or minus 0.003 inches. The threaded style tip uses a 1/4 inch-28 UNF-2A thread and features a 1/4 inch OD. A licensed welding professional or MIG gun technician installs this tip as part of routine consumable maintenance on MIG welding guns rated up to 400 amps. Sold in packs of 25.

This contact tip is rated for standard MIG welding applications up to 400 amps. It is compatible with 200 to 400 amp Tweco No. 2, No. 3, and No. 4 MIG guns as well as specific Tweco MIG gun series. The tip works with both slip-on and thread-on nozzle styles. The thick-walled copper alloy construction acts as a heat sink, drawing heat away from the arc source during continuous welding operations. The part number and wire diameter are marked directly on the tip for quick identification in the field.

Key Features

• 0.038 inch nominal bore diameter with plus or minus 0.003 inch ID tolerance for consistent wire feed
• Machined from 122 DHP extruded or gun-drilled copper alloy for smooth, uniform inside surface
• Twist-lock design secures tip in place against the gas diffuser without relying on threads alone
• Quarter-turn clockwise rotation reveals a new wear point, effectively doubling tip service life
• Thick-walled design conducts heat away from the arc source, extending tip longevity
• Part number and wire diameter marked on each tip for easy field identification
• Sold as 25 per pack

Compatibility

Compatible with 200 to 400 amp Tweco No. 2, No. 3, and No. 4 MIG guns, as well as specific Tweco MIG gun series. Fits both slip-on and thread-on nozzle styles using the 1/4 inch-28 UNF-2A thread standard.

Installation Notes

Installation and replacement of MIG contact tips is performed by qualified welding technicians or maintenance personnel. Always power down the welder and allow the gun to cool before removing a worn tip. Use the twist-lock engagement to seat the tip fully against the gas diffuser, and confirm the nozzle style (slip-on or thread-on) matches the gun configuration before installation. Follow the equipment manufacturer's service guidelines and applicable workplace safety standards when servicing MIG gun consumables.

Technical Specifications

• Wire Diameter: 0.030 inches
• Bore Diameter (Nominal ID): 0.038 inches
• ID Tolerance: plus or minus 0.003 inches
• Length: 1.5 inches
• Outer Diameter: 0.25 inches
• Thread Size: 1/4 inch-28 UNF-2A
• Maximum Amperage: 400 amps
• Material: 122 DHP copper alloy
• Weight: 0.02 pounds
• Quantity per Pack: 25
• Unit of Measure: Each

Standard Information

• Brand: TWECO
• Manufacturer Part Number: 1140-1101