{"product_id":"robbjack-c1-401-12-square-end-mill-3-8-in-4-flute-carbide","title":"Robbjack C1-401-12 Square End Mill 3\/8 in 4 Flute Carbide","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe ROBBJACK C1-401-12 is a solid carbide square end mill designed for precision milling operations in metal, composites, and engineering plastics. It features a 3\/8-inch cutting diameter with a 7\/8-inch length of cut, a 30-degree helix angle, and 4 spiral flutes in a right-hand cut, right-hand flute configuration. The uncoated C2-grade carbide construction delivers consistent edge integrity across a range of general-purpose machining applications. This tool is centercutting, allowing direct plunge entry. It is intended for use by machinists and tool-and-die professionals operating CNC mills or manual knee mills.\u003c\/p\u003e\n\u003cp\u003eThis end mill fits standard 3\/8-inch collets or tool holders and is suited for slotting, profiling, and peripheral milling in both conventional and climb-milling setups. The regular-length geometry and 2-1\/2-inch overall length make it appropriate for typical workpiece reach without sacrificing rigidity. It is commonly used in job shop, production, and maintenance machining environments where a dependable general-purpose square end mill is required.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eSolid C2-grade carbide construction for wear resistance and edge retention\u003c\/li\u003e\n  \u003cli\u003e4-flute spiral design provides efficient chip evacuation and smooth finish\u003c\/li\u003e\n  \u003cli\u003e30-degree helix angle balances cutting forces across a range of materials\u003c\/li\u003e\n  \u003cli\u003eCentercutting geometry allows plunge milling without a pre-drilled entry point\u003c\/li\u003e\n  \u003cli\u003eRight-hand cut and right-hand flute configuration for standard CNC and manual mill spindles\u003c\/li\u003e\n  \u003cli\u003eUncoated finish suitable for applications where coating is not required or where regrinding is planned\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned for use with standard 3\/8-inch collets and tool holders in CNC machining centers and manual milling machines; part of the ROBBJACK C1-401 series of general-purpose solid carbide square end mills.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation should be performed by a qualified machinist following the machine tool manufacturer guidelines. Ensure the spindle is fully stopped and locked out before inserting or removing the end mill from the collet or tool holder. Verify collet condition and clamping torque per the tool holder manufacturer specification before running. Do not exceed the recommended depth of cut or feed rate for the workpiece material and tool diameter.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMill Diameter\u003c\/strong\u003e: 3\/8 inch (0.3750 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLength of Cut\u003c\/strong\u003e: 7\/8 inch (0.8750 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 2-1\/2 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 3\/8 inch (0.3750 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNumber of Flutes\u003c\/strong\u003e: 4\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHelix Angle\u003c\/strong\u003e: 30 degrees\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlute Type\u003c\/strong\u003e: Spiral\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEnd Mill Material\u003c\/strong\u003e: Solid Carbide\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial Grade\u003c\/strong\u003e: C2\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCutting Direction\u003c\/strong\u003e: Right Hand\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlute Direction\u003c\/strong\u003e: Right Hand\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCentercutting\u003c\/strong\u003e: Yes\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoating\u003c\/strong\u003e: Uncoated\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLength Type\u003c\/strong\u003e: Regular\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMill Diameter Tolerance\u003c\/strong\u003e: +0.000 \/ -0.003 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Diameter Tolerance\u003c\/strong\u003e: -0.0001 \/ -0.0002 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Length Tolerance\u003c\/strong\u003e: +0.060 \/ -0.060 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: C1-401\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.125 pounds\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eStandard Information\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: ROBBJACK\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: C1-401-12\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ROBBJACK","offers":[{"title":"Default Title","offer_id":51972167860530,"sku":"C1-401-12","price":113.94,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/3fba17ae77cb65638e326966206b0b63.jpg?v=1789963628","url":"https:\/\/voomisupply.com\/products\/robbjack-c1-401-12-square-end-mill-3-8-in-4-flute-carbide","provider":"Voomi Supply","version":"1.0","type":"link"}