{"product_id":"seco-03215381-ball-end-mill-0-059-in-2-flute-carbide-diamond","title":"Seco 03215381 Ball End Mill 0.059 in 2 Flute Carbide Diamond","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe SECO 03215381 is a solid carbide ball end mill from the JMB642 series, designed for high-precision milling of graphite and similarly abrasive non-metallic materials. It features a 0.059 inch (1.50 mm) mill diameter with a 0.75 mm nose radius and carries a PVD diamond coating that resists the extreme abrasive wear graphite imposes on cutting edges. The two-flute, single-end design uses a right-hand helical flute configuration at a 30-degree helix angle, falling in the medium helix style category. With an extended reach geometry and a neck length of 0.24 inches (5.10 mm), this tool reaches into tighter workpiece features without sacrificing rigidity.\u003c\/p\u003e\u003cp\u003eThis end mill is intended for use in CNC machining centers performing roughing and finishing passes on graphite electrodes and comparable workpiece materials. The extended reach and reduced neck diameter of 1.40 mm allow access to deep cavities and fine-detail electrode geometries common in EDM (electrical discharge machining) toolroom applications. It mounts on a straight-cylindrical 4 mm shank (0.16 inches) with a h5 shank diameter tolerance, fitting standard ER collet toolholding systems used by machining professionals.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003ePVD diamond coating for superior wear resistance on abrasive graphite and non-metallic materials\u003c\/li\u003e\n\u003cli\u003eExtended reach design with 0.30 inch (7.50 mm) reach length and 1.40 mm neck diameter for deep-cavity access\u003c\/li\u003e\n\u003cli\u003eMicrograin solid carbide substrate for edge stability at small diameters\u003c\/li\u003e\n\u003cli\u003eRight-hand cut and right-hand helical flutes at 30-degree helix angle for efficient chip evacuation\u003c\/li\u003e\n\u003cli\u003eRated for both roughing and finishing material removal in a single tool\u003c\/li\u003e\n\u003cli\u003eLow TIR maximum of 0.01 mm for tight runout control at this diameter\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eThe 03215381 belongs to the SECO JMB642 series and is catalogued under manufacturer part JMB642015G3B.0Z2-DIA. It is designed for use with standard straight-cylindrical collet toolholding systems accepting a 4 mm shank, and is optimized for graphite milling applications.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eThis tool is installed and operated by skilled CNC machinists or toolroom technicians using calibrated collet chucks or ER collet holders sized for a 4 mm shank. Before mounting, confirm collet bore cleanliness and runout within specification, as runout at this diameter directly affects surface finish and tool life. Always verify spindle RPM and feed rate settings against the tool manufacturer's cutting data for the specific workpiece material before starting a cut. Do not use this tool on ferrous materials — it is engineered specifically for graphite and similar non-metallic, abrasive workpieces.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMill Diameter\u003c\/strong\u003e: 0.059 inches (1.50 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Flutes\u003c\/strong\u003e: 2\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: Diamond (PVD)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 1.97 inches (50.00 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength of Cut\u003c\/strong\u003e: 0.06 inches (2.40 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 0.16 inches (4.00 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Type\u003c\/strong\u003e: Straight-Cylindrical\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Diameter Tolerance\u003c\/strong\u003e: h5\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNose Radius\u003c\/strong\u003e: 0.75 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNeck Diameter\u003c\/strong\u003e: 1.40 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNeck Length\u003c\/strong\u003e: 0.24 inches (5.10 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReach Length\u003c\/strong\u003e: 0.30 inches (7.50 mm)\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: Helical\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting Direction\u003c\/strong\u003e: Right Hand\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSingle or Double End\u003c\/strong\u003e: Single\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExtended Reach\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\u003ePrimary Workpiece Material\u003c\/strong\u003e: Graphite\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\u003eMill Diameter Tolerance\u003c\/strong\u003e: +0.00 \/ -0.02 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTIR Maximum\u003c\/strong\u003e: 0.01 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: JMB642\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage Weight\u003c\/strong\u003e: 0.04 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage Dimensions\u003c\/strong\u003e: 2.17 inches L x 0.51 inches W x 0.51 inches H\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: 03215381\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SECO TOOLS","offers":[{"title":"Default Title","offer_id":51559728775474,"sku":"03215381","price":189.15,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/2fd417c414859eda021979e29d27b96b.jpg?v=1786439369","url":"https:\/\/voomisupply.com\/products\/seco-03215381-ball-end-mill-0-059-in-2-flute-carbide-diamond","provider":"Voomi Supply","version":"1.0","type":"link"}