{"product_id":"tweco-1040-1138-mig-gun-400a-15-ft-air-cooled","title":"Tweco 1040-1138 Mig Gun 400A 15 Ft Air Cooled","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe TWECO 1040-1138 is a Professional No. 4 Classic Series air-cooled MIG gun rated at 400 amps with a 15-foot lead cable and Miller-style rear connection. Designed for semi-automatic MIG welding, it accepts 5\/64-inch wire and delivers a 60% duty cycle when running CO2 shielding gas. The three-layer conductor tube construction — copper tube, silicon-resin glass insulator, and metal jacket — provides a reliable current path from handle to contact tip. A fully insulated Mig-Kwik connection at the wire feeder end allows fast connection and disconnection without tools. The 60-degree metal jacket conductor tube swivels 360 degrees around the handle, making repositioning quick during continuous production runs. Licensed welders and fabrication shop technicians are the primary installers and users of this gun.\u003c\/p\u003e\u003cp\u003eThis gun is suited for medium- and heavy-duty fabrication environments including production welding, maintenance and repair, farm and shop work, and artistic metalworking. The oval-shaped handle is balanced to pivot at its center, reducing grip fatigue during extended use. A steel spring strain relief at the rear of the handle supports the Cablehoz and minimizes wire feed problems. A gun hanger at the bottom of the handle allows the operator to rest the gun safely between passes. Two ball-point screws lock the Cablehoz and conductor tube securely in place, and the split-half handle case allows field repair without additional connectors.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e400-amp rating with 60% duty cycle on CO2 shielding gas\u003c\/li\u003e\n\u003cli\u003eAccepts 5\/64-inch wire diameter with heavy-duty contact tip\u003c\/li\u003e\n\u003cli\u003e360-degree swivel, 60-degree metal jacket conductor tube for flexible positioning\u003c\/li\u003e\n\u003cli\u003eSilver-plated trigger contacts with self-cleaning action on every actuation\u003c\/li\u003e\n\u003cli\u003eFully insulated Mig-Kwik connector for tool-free connection and disconnection at the wire feeder\u003c\/li\u003e\n\u003cli\u003eThree-layer conductor tube construction for durability in high-heat applications\u003c\/li\u003e\n\u003cli\u003eField-repairable split-half handle; front-end consumables interchangeable with Tweco Spray Master series\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eFeatures a Miller-style rear connection for use with compatible Miller wire feeders. Front-end consumables are interchangeable with the Tweco Spray Master series and other Tweco Professional No. series guns.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation and service should be performed by a qualified welding technician or trained fabrication professional. Disconnect and de-energize the welding power source and wire feeder before connecting or servicing the gun. Ensure the Mig-Kwik connection is fully seated and locked before resuming operation. Follow the wire feeder manufacturer's guidelines and applicable ANSI\/AWS safety standards when setting up or changing consumables.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAmperage\u003c\/strong\u003e: 400 amps\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDuty Cycle\u003c\/strong\u003e: 60% with CO2 gas\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWire Size\u003c\/strong\u003e: 5\/64 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLead Length\u003c\/strong\u003e: 15 feet\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConductor Tube Angle\u003c\/strong\u003e: 60 degrees\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConductor Tube Swivel\u003c\/strong\u003e: 360 degrees\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCooling Method\u003c\/strong\u003e: Air cooled\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConnection Style\u003c\/strong\u003e: Miller style rear connection\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage Dimensions\u003c\/strong\u003e: 23.1 inches x 14.5 inches x 3.3 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 11.75 pounds\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eStandard Information\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: TWECO\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 1040-1138\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"TWECO","offers":[{"title":"Default Title","offer_id":51345971577138,"sku":"1040-1138","price":1265.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/310545692.jpg?v=1782067964","url":"https:\/\/voomisupply.com\/products\/tweco-1040-1138-mig-gun-400a-15-ft-air-cooled","provider":"Voomi Supply","version":"1.0","type":"link"}