Tweco 1150-1209 Mig Contact Tip 0.062 in 25 Pack

Product Description

The TWECO 1150-1209 is a heavy-duty MIG contact tip designed for high-amperage welding applications up to 500 amps. Part of the Tweco 15H series, it accepts 0.062 inch (5/64 inch) wire diameter and features a 0.090 inch nominal bore ID with a tolerance held to plus or minus 0.003 inches. The tip measures 1.97 inches in length and is machined from 122 DHP copper alloy tubing, providing a consistent, smooth inside diameter surface with excellent electrical conductivity. A licensed welding technician or fabricator typically installs this consumable as part of routine MIG gun maintenance.

This contact tip is rated for use with 200 to 500 amp Tweco No. 5 MIG guns and compatible heavy-duty MIG gun series. Its threaded design uses a 5/16 inch-18 UNC-2A thread for secure engagement with the gas diffuser. The tip supports both slip-on and thread-on nozzle styles. It is sold in packs of 25, making it well suited for high-volume production welding environments or service fleets that cycle through consumables regularly. The 0.345 inch OD and thick-walled construction make it appropriate for demanding, continuous-duty welding cycles.

Key Features

• Rated up to 500 amps for heavy-duty MIG welding applications
• Machined from 122 DHP extruded or gun-drilled copper alloy for consistent bore surface
• Inside diameter tolerance held to plus or minus 0.003 inches for reliable wire feed
• Twist-lock design engages gas diffuser without loose threading concerns
• Quarter-turn clockwise rotation reveals a new wear point, effectively doubling tip service life
• Thick-walled construction acts as a heat sink, conducting heat away from the arc source
• Part number and wire diameter marked on each tip for easy field identification

Compatibility

Compatible with 200 to 500 amp Tweco No. 5 MIG guns and specific compatible MIG gun series. Fits gas diffusers accepting a 5/16 inch-18 UNC-2A threaded contact tip in slip-on or thread-on nozzle configurations.

Installation Notes

Contact tip replacement is performed by qualified welding technicians as part of standard MIG gun consumable service. Power down and disconnect the welding machine before servicing the gun head. Ensure the replacement tip is fully seated and locked against the gas diffuser before resuming operation. Do not overtighten threaded tips; hand-tight engagement followed by a quarter-turn is the general practice for this tip style.

Technical Specifications

• Wire Diameter: 0.062 inches (5/64 inch)
• Bore ID: 0.090 inches nominal
• Bore Tolerance: plus or minus 0.003 inches
• OD: 0.345 inches
• Length: 1.97 inches
• Thread Size: 5/16 inch-18 UNC-2A
• Current Rating: 500 amps maximum
• Material: 122 DHP copper alloy
• Pack Quantity: 25 per pack
• Weight: 0.05 pounds

Standard Information

• Brand: TWECO
• Manufacturer Part Number: 1150-1209