{"product_id":"osg-5213200-ball-end-mill-0-875-in-2-flute-cobalt","title":"Osg 5213200 Ball End Mill 0.875 in 2 Flute Cobalt","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe OSG 5213200 is a single-end cobalt high-speed steel ball end mill designed for general milling applications including roughing and finishing operations. Built from M42 cobalt HSS, it delivers greater heat and wear resistance than standard HSS tooling, making it well suited for interrupted cuts and harder workpiece materials. The mill measures 0.875 inches in diameter with a 1.875-inch length of cut, a 4.125-inch overall length, and a 0.75-inch Weldon flat shank. It features two helical flutes with a 30-degree medium helix angle, a 0.4375-inch nose radius, and a bright uncoated finish. Licensed machinists and toolroom operators install this cutter on conventional and CNC vertical milling machines.\u003c\/p\u003e\u003cp\u003eThe OSG 5213200 is intended for milling steel as its primary workpiece material, with secondary compatibility covering stainless steel, cast iron, non-ferrous metals, and hard materials. It belongs to OSG Series 521, a line of high-performance cobalt HSS end mills targeting general-purpose shop applications. The Weldon flat shank provides positive drive in side-lock tool holders, reducing slippage under heavy lateral loads. The single-end configuration makes it a standard choice for profiling, contouring, and slot milling work in job shop and production environments.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eM42 cobalt HSS construction for improved heat resistance and tool life over standard HSS\u003c\/li\u003e\n\u003cli\u003e2-flute helical design with 30-degree medium helix angle for efficient chip evacuation\u003c\/li\u003e\n\u003cli\u003e0.4375-inch ball nose radius enables profiling, 3D contouring, and radius milling\u003c\/li\u003e\n\u003cli\u003eWeldon flat shank provides positive drive in side-lock holders\u003c\/li\u003e\n\u003cli\u003eBright uncoated finish suitable for a wide range of ferrous and non-ferrous materials\u003c\/li\u003e\n\u003cli\u003eRight-hand cut and right-hand flute direction for standard spindle operation\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned for use in milling machines accepting a 0.75-inch shank diameter. Primary workpiece material is steel (ISO P); secondary materials include stainless steel (M), cast iron (K), non-ferrous metals (N), and hard materials (H). Part of OSG Series 521 high-performance cobalt HSS end mills for general milling applications.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstall and remove cutting tools only with the machine spindle fully stopped and the machine powered down or in an e-stop state. Secure the Weldon flat shank in a compatible side-lock or Weldon-style tool holder, ensuring the set screw engages the flat directly. Inspect the shank and holder bore for chips or burrs before assembly. Follow the machine manufacturer and ANSI B11 safety guidelines for tooling setup and runout verification before cutting.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMill Diameter\u003c\/strong\u003e: 0.875 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength of Cut\u003c\/strong\u003e: 1.875 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 4.125 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 0.75 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Type\u003c\/strong\u003e: Weldon Flat\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Flutes\u003c\/strong\u003e: 2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlute Type\u003c\/strong\u003e: Helical\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHelix Angle\u003c\/strong\u003e: 30 degrees\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHelix Style\u003c\/strong\u003e: Medium\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNose Radius\u003c\/strong\u003e: 0.4375 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnd Mill Material\u003c\/strong\u003e: Cobalt HSS (M42)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating\/Finish\u003c\/strong\u003e: Bright\/Uncoated\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\u003eEnd Configuration\u003c\/strong\u003e: Single End\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMill Diameter Tolerance\u003c\/strong\u003e: +0.0011 \/ -0.0000 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrimary Workpiece Material\u003c\/strong\u003e: Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSecondary Workpiece Materials\u003c\/strong\u003e: Stainless Steel, Cast Iron, Non-Ferrous Metal, Hard Material\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\u003eSeries\u003c\/strong\u003e: 521\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSystem of Measurement\u003c\/strong\u003e: Fractional Inch\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eStandard Information\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: OSG\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 5213200\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"OSG","offers":[{"title":"Default Title","offer_id":51754505503026,"sku":"5213200","price":216.48,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/5b5f0b11c7f2b36f141b0330910bb9cb.jpg?v=1788946121","url":"https:\/\/voomisupply.com\/products\/osg-5213200-ball-end-mill-0-875-in-2-flute-cobalt","provider":"Voomi Supply","version":"1.0","type":"link"}