The Tweco Classic No. 4 MIG Gun (SKU: 10401112)<\/strong> represents the benchmark for air-cooled semi-automatic welding. For decades, the “Classic” series has been the preferred choice for industrial fabricators requiring a robust, reliable, and easily serviceable tool. This specific configuration is rated for 400 Amps at a 60% duty cycle<\/strong> using CO2 gas, making it ideal for structural steel, heavy equipment manufacturing, and general fabrication tasks where high heat and long arc-on times are common.<\/p>\n This model features a 12-foot cable assembly<\/strong>, offering a balance between reach and wire feedability. It comes equipped with a standard Tweco backend connection<\/strong>, ensuring compatibility with a vast range of wire feeders and power sources that utilize the Tweco style adapter. The gun is pre-configured with a liner and contact tip setup for 1\/16″ (1.6mm) welding wire<\/strong>, targeting heavy deposition applications. The Classic No. 4 utilizes the widely available Tweco 14 Series contact tips, 24 Series nozzles, and 54 Series gas diffusers, ensuring that consumables are always easy to source and cost-effective.<\/p>\n Engineered for longevity, the gun features a metal-jacketed conductor tube and a heavy-duty coaxial cable that resists cuts, burns, and abrasion. The air-cooled design eliminates the complexity of water coolers while maintaining high amperage capacity, providing a straightforward solution for harsh industrial environments. Whether you are upgrading existing equipment or outfitting a new welding cell, the Tweco Classic No. 4 delivers the consistent performance professionals demand.<\/p>\n","protected":false},"excerpt":{"rendered":"The Industry Standard for Heavy-Duty MIG Welding The Tweco Classic No. 4 MIG Gun (SKU: 10401112) represents the benchmark for air-cooled semi-automatic welding. For decades, the “Classic” series has been the preferred choice for industrial fabricators requiring a robust, reliable, and easily serviceable tool. This specific configuration is rated for 400 Amps at a 60%… View Article<\/a>","protected":false},"featured_media":0,"template":"","meta":{"_acf_changed":false},"product_brand":[],"product_cat":[2042,2043],"product_tag":[],"class_list":{"0":"post-1781953","1":"product","2":"type-product","3":"status-publish","5":"product_cat-mig-accessories","6":"product_cat-mig-guns","7":"pa_amps-400amp","8":"pa_back-end-tweco","9":"pa_brand-tweco","10":"pa_duty-cycle-60-at-400a","11":"pa_length-12-ft","12":"pa_packaging-description-pack-of-1","13":"pa_wire-size-1-16","15":"first","16":"onbackorder","17":"taxable","18":"shipping-taxable","19":"purchasable","20":"product-type-simple"},"acf":[],"_links":{"self":[{"href":"https:\/\/josefgases.com\/stage\/wp-json\/wp\/v2\/product\/1781953","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/josefgases.com\/stage\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/josefgases.com\/stage\/wp-json\/wp\/v2\/types\/product"}],"wp:attachment":[{"href":"https:\/\/josefgases.com\/stage\/wp-json\/wp\/v2\/media?parent=1781953"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/josefgases.com\/stage\/wp-json\/wp\/v2\/product_brand?post=1781953"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/josefgases.com\/stage\/wp-json\/wp\/v2\/product_cat?post=1781953"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/josefgases.com\/stage\/wp-json\/wp\/v2\/product_tag?post=1781953"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}