Tweco 1150-1230 Mig Contact Tip 0.035 in 0.044 Bore

Product Description

The TWECO 1150-1230 is a threaded MIG contact tip designed for 0.035-inch wire with a 0.044-inch nominal bore diameter. Built from 122 DHP copper alloy tubing, this tip delivers consistent electrical conductivity and a smooth inside diameter surface held to a tolerance of plus or minus 0.003 inches. At 1.97 inches in length with a 5/16-inch-18 UNC-2A thread, it seats properly against a gas diffuser when installed on a MIG welding gun. Licensed welders and service technicians working in heavy-duty welding environments up to 500 amps will find this tip reliable across demanding production cycles.

This contact tip is suited for heavy-duty MIG welding applications where consistent wire feed and electrical contact are critical. The threaded design ensures solid engagement with the gas diffuser on compatible MIG guns. Each tip is individually marked with the part number and wire diameter, reducing the chance of misidentification during changeouts in multi-wire-size shops. This tip is sold as a single unit.

Key Features

• 0.035-inch wire size with 0.044-inch nominal bore for consistent wire feeding
• Machined from 122 DHP copper alloy tubing for excellent electrical conductivity
• Inside diameter tolerance held to plus or minus 0.003 inches for consistent surface quality
• 5/16-inch-18 UNC-2A thread ensures secure fit against gas diffuser
• Rated for heavy-duty welding applications up to 500 amps
• Part number and wire diameter marked on each tip for easy field identification

Compatibility

Designed as an OEM-style threaded contact tip replacement for MIG welding guns accepting a 5/16-inch-18 UNC-2A threaded tip with a 1.97-inch length.

Installation Notes

Installation should be performed by a qualified welding technician with the MIG gun powered down and the wire feeder disabled before tip removal or installation. Use appropriately rated pliers or a contact tip wrench to seat the tip snugly against the gas diffuser — do not overtighten. Inspect the bore for wear or spatter buildup at regular intervals, and replace when wire tracking becomes inconsistent or arc quality degrades.

Technical Specifications

• Wire Diameter: 0.035 inches
• Nominal Bore (ID): 0.044 inches
• Outside Diameter (OD): 0.345 inches
• Length: 1.97 inches
• Thread Size: 5/16-18 UNC-2A
• Maximum Current Rating: 500 amps
• ID Tolerance: plus or minus 0.003 inches
• Material: 122 DHP Copper Alloy
• Weight: 0.05 pounds
• UPC: 608246287584

Standard Information

• Brand: TWECO
• Manufacturer Part Number: 1150-1230