{"product_id":"seco-03083959-square-end-mill-4mm-4-flute-solid-carbide","title":"Seco 03083959 Square End Mill 4mm 4 Flute Solid Carbide","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe SECO 03083959 is a single-end square end mill designed for high-performance metal removal in demanding machining applications. Built from micrograin solid carbide and coated with AlTiN, it delivers hardness and thermal resistance needed when cutting hard materials and stainless steel. The 4 mm cutting diameter pairs with an 8 mm length of cut and a variable helix geometry that reduces chatter and improves chip evacuation. With a 6 mm straight-cylindrical shank and a maximum TIR of 0.0005 inches, it seats precisely in standard collet or end mill holders. Machinists and CNC operators working in job shops, tool rooms, or production environments install and run this tool.\u003c\/p\u003e\u003cp\u003eThis end mill is suited for milling hard materials and stainless steel, including exotic alloys, in both roughing and finishing passes where a 4 mm tool diameter is specified. The STR440M.2 series geometry is optimized for right-hand cutting with helical flutes, making it appropriate for slotting, profiling, and pocketing operations on CNC machining centers and manual mills equipped for small-diameter tooling. It is a single-end tool, so it is replaced rather than flipped when the cutting end wears.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eMicrograin solid carbide construction for rigidity and wear resistance in hard material cutting\u003c\/li\u003e\n\u003cli\u003eAlTiN coating provides thermal and oxidation resistance at elevated cutting temperatures\u003c\/li\u003e\n\u003cli\u003eVariable helix design reduces harmonic vibration and improves surface finish\u003c\/li\u003e\n\u003cli\u003e4 flutes with right-hand helical flute geometry for efficient chip flow\u003c\/li\u003e\n\u003cli\u003eCenter-cutting capable, allowing direct plunge entry into workpiece material\u003c\/li\u003e\n\u003cli\u003eStraight-cylindrical shank fits standard collet chucks and end mill holders\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-specification replacement or direct-use end mill for CNC and manual milling applications requiring a 4 mm diameter, 6 mm shank, solid carbide square end mill in the SECO STR440M.2 series.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation is performed by machinists or CNC setup technicians. The machine spindle must be fully stopped and the tool-change interlock confirmed before seating or removing the tool. Use a properly sized collet or end mill holder matched to the 6 mm shank diameter, and torque the retention mechanism per the holder manufacturer specification. Inspect the shank and collet bore for chips or wear before clamping to maintain TIR within tolerance.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMill Diameter\u003c\/strong\u003e: 4 mm (0.1575 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Flutes\u003c\/strong\u003e: 4\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength of Cut\u003c\/strong\u003e: 8 mm (0.3150 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length (OAL)\u003c\/strong\u003e: 58 mm (2.28 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 6 mm (0.2362 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Type\u003c\/strong\u003e: Straight-Cylindrical\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnd Mill Material\u003c\/strong\u003e: Solid Carbide (Micrograin)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating\u003c\/strong\u003e: AlTiN\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHelix Type\u003c\/strong\u003e: Variable Helix\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlute Type\u003c\/strong\u003e: Helical\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting 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\u003eSingle or Double End\u003c\/strong\u003e: Single End\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrimary Workpiece Material\u003c\/strong\u003e: Hard Material, Stainless Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum TIR\u003c\/strong\u003e: 0.0005 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: STR440M.2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage Dimensions\u003c\/strong\u003e: 2.58 inches length, 0.5 inches width, 0.5 inches height\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.06 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: SECO\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 03083959\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SECO TOOLS","offers":[{"title":"Default Title","offer_id":51559841005874,"sku":"03083959","price":63.98,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/a2c94fc1fbf25527f8e99e657e36e194_daa041db-459f-4520-9404-22f92fcd31a1.jpg?v=1786442536","url":"https:\/\/voomisupply.com\/products\/seco-03083959-square-end-mill-4mm-4-flute-solid-carbide","provider":"Voomi Supply","version":"1.0","type":"link"}