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Tweco® 400 Amp Professional Classic® No. 4 0.063" Air Cooled MIG Gun - 25' Cable/Miller® Style Connector

Airgas Part #:TWE1040-1128

Manufacturer Part #:10401128

$884.08 /Each

Item Details

  • Tweco® Professional No. 4 Classic Series 400 A MIG Gun with heavy-duty contact tip accommodates wires of size 0.045" - 1/16" and features oval shaped handle as well as silver plated trigger. Air-cooled MIG gun is ideal for semi-automatic welding applications and is suitable for medium/heavy-duty fabrication. 25' Lead cable offers good wire feedability and features Miller® style rear connection. MIG gun offers 60% duty cycle with CO2 gas and is fully tested. It is equipped with 60 deg metal jacket conductor tube that can swivel a full 360 deg around handle and offers quick replacement. It features fully insulated MIG-Kwik connection that allows quick connection as well as disconnection at the wire feeder. It features 2 ball-point screws to secure the Cablehoz® and conductor tube. It is balanced to pivot at the center of the handle that reduces operator fatigue and features gun hanger at bottom for easy resting. It features steel spring strain relief that provides support to the Cablehoz® coming out the rear of handle to reduce wire feed issues. It features enhanced direct plug capabilities and is easy to repair. Industry standard gun features lower inventory carrying costs. It features a patent-pending design that is easy to maneuver in various welding positions. It has 3-layered conductor tube constructions for durability and features enhanced performance.


  • Industry standard for 40+ years, oval shaped handle reduces grip required to manipulate MIG gun position
  • Balanced to pivot at the center of the handle for ease of use in different welding positions, reduces operator fatigue
  • Gun hanger located at the bottom for ease of resting gun when not in use
  • Heavy-duty design for industrial application environments using special plastic composition for high impact crush-resistant handle
  • Steel spring strain relief provides support to the Cablehoz® coming out the rear of the handle to minimize wire feed issues
  • Mechanical connection of conductor tube and Cablehoz® within the handle providing excellent current path to the end of the contact tip
  • Two (2) ball-point screws are used to secure the Cablehoz® and conductor tube in place
  • Trigger contains silver plated contacts with a self cleaning action every time the trigger is engaged and disengaged
  • Industry Standard
  • Metal jacket conductor tube
  • Enhanced direct plug capabilities
  • Durable and dependable for industrial applications, heavy-duty design, high impact resistant handle and components, three layer conductor tube construction (copper tube/silicon-resin glass insulator/metal jacket)
  • Field repairable: Split-half handle case provides access for ease of repair - easily repair Cablehoz®, no additional connectors required
  • Improved performance with longer life consumables wide selection of front end consumables available, heavy-duty contact tips in high heat applications offered
  • Lower inventory carrying costs: Interchangeable front end consumables between Tweco® Spray Master® series and Tweco® Professional No. Series


  • Rated at 60% duty cycle using CO2 gas


  • Farm
  • Garage
  • Hobby/DIY
  • Artistic Metal Working
  • Shop Jobs
  • Maintenance And Repair Applications
  • Production

Product Attributes

MIG Amperage Range

» 400 A

Trade Name

» Tweco® Professional Classic® No. 4

MIG Wire Size

» 0.063"

Cable Length

» 25'

Cooling Method

» Air Cooled

Rear Connection

» Miller® Style Connector

Wire Type

» Solid
» Flux Cored Gas Shielded
» Flux Cored Self-Shielded
» Aluminum