{"product_id":"iscar-3401089-corner-radius-end-mill-3-4-in-4-flute-carbide","title":"Iscar 3401089 Corner Radius End Mill 3\/4 in 4 Flute Carbide","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe ISCAR 3401089 is a solid carbide corner radius end mill designed for demanding material removal in ferrous and difficult-to-machine alloys. With a 3\/4 inch diameter, a 0.015 inch corner radius, and four flutes arranged in a variable index geometry, this tool is built for both roughing and finishing passes in a single setup. The AlTiCrSiN PVD coating provides heat and wear resistance at elevated cutting temperatures. The 38-degree helix angle and submicron carbide substrate work together to maintain edge integrity in high-hardness applications. Licensed machinists and CNC operators install this tool in milling centers handling production work in steel, stainless steel, cast iron, superalloys, and titanium.\u003c\/p\u003e\n\u003cp\u003eThis end mill fits directly into Weldon flat toolholders with a 3\/4 inch shank diameter held to h6 tolerance. The medium-length flute design — 1-5\/8 inches of reach length — suits peripheral milling, slotting, and profiling where extended reach is needed but deflection must be controlled. The ECI-4-VF series from ISCAR targets ISO material groups P, M, K, S, and H, making it a versatile choice for shops running mixed-material workloads. The centercutting geometry allows plunge entry without a pre-drilled pilot hole. Right-hand flute direction and right-hand cutting orientation are standard for conventional CNC milling spindles.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eAlTiCrSiN PVD coating for extended tool life in hard and abrasive materials\u003c\/li\u003e\n  \u003cli\u003eVariable index flute spacing reduces harmonic chatter during aggressive cuts\u003c\/li\u003e\n  \u003cli\u003eCentercutting design permits direct plunge entry\u003c\/li\u003e\n  \u003cli\u003eWeldon flat shank with h6 tolerance for secure toolholder seating\u003c\/li\u003e\n  \u003cli\u003eExtended reach geometry with 1-5\/8 inch reach length suits deep-pocket profiling\u003c\/li\u003e\n  \u003cli\u003eSubmicron carbide substrate supports cutting in hardened steels and superalloys\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned for use with standard Weldon flat toolholders accepting a 3\/4 inch shank. ISCAR catalog reference ECI-4 750-1.62W015VF4. Suitable for ISO material groups P (steel), M (stainless steel), K (cast iron), S (superalloys and titanium), and H (hard materials).\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation is performed by qualified CNC machinists or toolroom personnel. Before tool changes, confirm the spindle is fully stopped and the machine is in a safe state per shop lockout procedures. Seat the Weldon flat securely against the toolholder set screw to prevent axial pullout under load. Verify runout with a test indicator after clamping before beginning any cut program.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMill Diameter\u003c\/strong\u003e: 3\/4 inch (0.7500 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNumber of Flutes\u003c\/strong\u003e: 4\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCorner Radius\u003c\/strong\u003e: 0.015 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLength of Cut\u003c\/strong\u003e: 1-5\/8 inches (1.2598 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eReach Length\u003c\/strong\u003e: 1-5\/8 inches (1.6250 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 4 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 3\/4 inch (0.7500 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Type\u003c\/strong\u003e: Weldon Flat\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Diameter Tolerance\u003c\/strong\u003e: h6\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\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial Grade\u003c\/strong\u003e: Submicron\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoating\u003c\/strong\u003e: AlTiCrSiN\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoating Classification\u003c\/strong\u003e: PVD\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlute Direction\u003c\/strong\u003e: Right Hand\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCutting Direction\u003c\/strong\u003e: Right Hand\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlute Type\u003c\/strong\u003e: Spiral\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eVariable Index\u003c\/strong\u003e: Yes\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCentercutting\u003c\/strong\u003e: Yes\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eExtended Reach\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\u003eEnd Type\u003c\/strong\u003e: Corner Radius\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 Material\u003c\/strong\u003e: Steel, Stainless Steel, Cast Iron, Superalloys and 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\u003eWeight\u003c\/strong\u003e: 0.01 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: ISCAR\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 3401089\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ISCAR","offers":[{"title":"Default Title","offer_id":51737390612786,"sku":"3401089","price":281.35,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/76aebafa75cad44d31f5c4a0535535fb_d5471914-f30c-4182-9299-096bbb4d515e.jpg?v=1788787937","url":"https:\/\/voomisupply.com\/products\/iscar-3401089-corner-radius-end-mill-3-4-in-4-flute-carbide","provider":"Voomi Supply","version":"1.0","type":"link"}