Tweco 1240-1857 Mig Welding Nozzle 1/2 Inch Bore

Product Description

The TWECO 1240-1857 is a medium duty, air cooled MIG welding nozzle with a 1/2 inch bore, designed for use with VELOCITY2 contact tips in semi-automatic MIG welding applications. Part of the VELOCITY2a nozzle series, it is engineered to deliver consistent shielding gas coverage and reliable arc performance across a range of wire feed welding operations. The nozzle weighs 0.23 pounds and measures 2.85 inches in length, making it a compact, lightweight replacement for production and job-site welding setups. Licensed welders and fabrication shops typically stock this nozzle for routine maintenance on MIG guns.

This nozzle fits medium duty MIG welding gun configurations and is intended for air cooled torch assemblies. It is suited for light-to-medium production welding in fabrication shops, maintenance and repair operations, and structural welding environments. The 1/2 inch bore diameter accommodates standard wire and gas flow requirements for common MIG welding processes. It is sold individually and is compatible with VELOCITY2 series contact tips as specified by TWECO.

Key Features

• 1/2 inch bore diameter for consistent shielding gas flow and arc stability
• Medium duty air cooled construction suited for production MIG welding
• Designed for use with VELOCITY2 contact tips for matched system performance
• Compact and lightweight at 0.23 pounds for easy handling and fast replacement
• Part of the VELOCITY2a nozzle series for improved welder convenience and productivity

Compatibility

Designed for use with TWECO VELOCITY2 Heavy Duty contact tips in air cooled MIG welding gun assemblies. Refer to TWECO documentation to confirm torch handle and gun body compatibility before ordering.

Installation Notes

Installation is performed by welding professionals during routine MIG gun maintenance. Always shut off the welding power source and allow the torch to cool completely before removing or installing nozzles. Thread the nozzle onto the gun body by hand, then snug securely without over-tightening to avoid thread damage. Inspect the contact tip and gas diffuser for wear at the same time as nozzle replacement.

Technical Specifications

• Bore Diameter: 1/2 inch
• Duty: Medium Duty
• Cooling Type: Air Cooled
• Length: 2.85 inches
• Width: 0.99 inches
• Height: 0.99 inches
• Weight: 0.23 pounds
• Sold As: Each
• Minimum Order Quantity: 2

Standard Information

• Brand: TWECO
• Manufacturer Part Number: 1240-1857