{"product_id":"iscar-3398203-corner-radius-end-mill-3-4in-4-flute-carbide","title":"Iscar 3398203 Corner Radius End Mill 3\/4in 4 Flute Carbide","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe ISCAR 3398203 is a solid carbide corner radius end mill from the ECI-4-VF series, designed for high-performance milling in demanding materials including steel, stainless steel, cast iron, superalloys, titanium, and hard materials. It carries a 3\/4-inch cutting diameter with a 0.09-inch corner radius, 4 flutes, and a 3-inch length of cut. The AlTiCrSiN PVD coating provides thermal resistance and wear protection at elevated cutting speeds. A variable index geometry supports both roughing and finishing operations in a single tool, reducing tool changes and setup time. Licensed HVAC and machining professionals recognize this class of end mill as a workhorse for interrupted cuts and long-reach applications.\u003c\/p\u003e\u003cp\u003eThis end mill is suited for CNC machining centers handling ferrous and exotic alloy components in aerospace, die-mold, and general precision manufacturing environments. The extended reach and long-length-of-cut design accommodate deep-pocket and cavity milling where short-reach tooling is impractical. The straight-cylindrical shank with h6 tolerance ensures accurate seating in standard collet chucks and hydraulic toolholders. Right-hand flute direction and right-hand cutting orientation are standard for conventional CNC spindle setups. The centercutting design allows plunge entry where required.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e0.09-inch corner radius reduces stress concentration and extends tool life in hardened and abrasive workpieces\u003c\/li\u003e\n\u003cli\u003eAlTiCrSiN PVD coating rated for steel, stainless steel, cast iron, superalloys, titanium, and hard materials\u003c\/li\u003e\n\u003cli\u003eVariable index flute spacing reduces harmonic chatter during aggressive roughing passes\u003c\/li\u003e\n\u003cli\u003eExtended reach with 3-inch reach length supports deep-pocket milling operations\u003c\/li\u003e\n\u003cli\u003eCentercutting geometry permits direct plunge entry without pre-drilled pilot holes\u003c\/li\u003e\n\u003cli\u003eSubmicron carbide grade delivers edge sharpness and toughness across a wide hardness range\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned for use with standard collet-style and hydraulic toolholders accepting a 3\/4-inch straight-cylindrical shank with h6 tolerance. The manufacturer catalog number for this tool is ECI-4 750-3.0C09VF6.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation should be performed by a qualified machinist or CNC setup technician. Ensure the spindle is fully stopped and the machine is in an e-stop or locked-out state before loading or unloading the tool. Seat the shank fully within the toolholder to the recommended gauge-line depth before torquing the collet nut or clamping mechanism per the toolholder manufacturer specifications. Verify runout with a dial indicator before beginning production cuts, as excessive runout accelerates edge wear and reduces corner radius accuracy.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting Diameter\u003c\/strong\u003e: 0.750 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCorner Radius\u003c\/strong\u003e: 0.09 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: 3 inches (0.8661 inches decimal)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 6 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 0.750 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Tolerance\u003c\/strong\u003e: h6\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReach Length\u003c\/strong\u003e: 3 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHelix Angle\u003c\/strong\u003e: 38 degrees\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnd Mill Material\u003c\/strong\u003e: Solid Carbide, Submicron Grade\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating\u003c\/strong\u003e: AlTiCrSiN (PVD)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlute Direction\u003c\/strong\u003e: Right Hand Spiral\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting Direction\u003c\/strong\u003e: Right Hand\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnd Type\u003c\/strong\u003e: Corner Radius\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSingle or Double End\u003c\/strong\u003e: Single\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCentercutting\u003c\/strong\u003e: Yes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVariable Index\u003c\/strong\u003e: Yes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoolant Through\u003c\/strong\u003e: No\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Type\u003c\/strong\u003e: Straight-Cylindrical\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial Removal Type\u003c\/strong\u003e: Roughing and Finishing\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrimary Workpiece Materials\u003c\/strong\u003e: Steel, Stainless Steel, Cast Iron, Superalloys, Titanium, Hard Material\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: ECI-4-VF\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUNSPSC Code\u003c\/strong\u003e: 27112803\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage Quantity\u003c\/strong\u003e: 1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 1.72 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: ISCAR\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 3398203\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ISCAR","offers":[{"title":"Default Title","offer_id":51733185921330,"sku":"3398203","price":417.72,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/76aebafa75cad44d31f5c4a0535535fb_0e3f3056-c321-46cd-8dd2-0c37487db0e0.jpg?v=1788752499","url":"https:\/\/voomisupply.com\/products\/iscar-3398203-corner-radius-end-mill-3-4in-4-flute-carbide","provider":"Voomi Supply","version":"1.0","type":"link"}