Tweco 1150-1211 Mig Contact Tip 0.12 Bore 1.97 in 500A

Product Description

The TWECO 1150-1211 is a 15H Series heavy-duty MIG contact tip designed for high-amperage wire welding applications up to 500 amps. Machined from extruded or gun-drilled 122 DHP copper alloy tubing, it delivers consistent electrical conductivity and a smooth inside diameter surface held to a tolerance of plus or minus 0.003 inches. The nominal bore is 0.12 inches, accommodating 7/64-inch welding wire, and the overall length is 1.97 inches. The OD measures 0.345 inches with a 5/16-18 UNC-2A thread. This tip is installed and serviced by professional welders and MIG gun technicians in fabrication, manufacturing, and industrial welding environments.

This contact tip is suited for heavy-duty MIG welding setups operating between 200 and 500 amps. It is compatible with Tweco No. 5 MIG guns and specific Tweco MIG gun series requiring the 15H tip profile. The thick-walled copper construction conducts heat away from the arc, extending service intervals in continuous or high-duty-cycle welding operations. The tip ships individually sold as 25 per pack and is marked with the part number and wire diameter for fast identification at the gun.

Key Features

• 122 DHP copper alloy construction for high electrical conductivity and heat dissipation
• 0.12-inch nominal bore accommodates 7/64-inch MIG wire with inside diameter tolerance held to plus or minus 0.003 inches
• Twist-lock design locks tip in place on the gas diffuser without loose thread engagement
• Quarter-turn clockwise rotation exposes a new wear point, effectively doubling tip service life
• Thick-walled design acts as a heat sink, drawing heat away from the arc source
• Part number and wire diameter marked directly on tip for quick identification
• Compatible with slip-on and thread-on nozzle styles

Compatibility

Designed for use with Tweco No. 5 MIG guns and compatible Tweco 15H Series MIG gun configurations rated for 200 to 500 amps.

Installation Notes

Installation is performed by qualified welders or MIG gun technicians. Always power down the welding machine and allow the gun to cool before replacing contact tips. Thread the tip into the gas diffuser by hand and seat it firmly using the twist-lock mechanism. Inspect the nozzle, diffuser, and liner for wear whenever the contact tip is replaced to maintain consistent arc performance.

Technical Specifications

• Bore Diameter (Nominal ID): 0.12 inches
• Outside Diameter (OD): 0.345 inches
• Length: 1.97 inches
• Thread Size: 5/16-18 UNC-2A
• Wire Size Accommodated: 7/64 inch (0.109 inch)
• Maximum Amperage: 500 A
• ID Tolerance: plus or minus 0.003 inches
• Material: 122 DHP Copper Alloy
• Package Quantity: 25 per pack
• Weight: 0.05 pounds

Standard Information

• Brand: TWECO
• Manufacturer Part Number: 1150-1211