{"product_id":"osg-402-3281-bn11-ball-end-mill-21-64-in-2-flute-carbide","title":"Osg 402-3281-BN11 Ball End Mill 21\/64 in 2 Flute Carbide","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe OSG 402-3281-BN11 is a solid carbide ball end mill designed for precision milling in ferrous and non-ferrous materials. It features a 21\/64-inch (0.3281-inch) cutting diameter with a 7\/8-inch length of cut and a TiAlN (titanium aluminum nitride) PVD coating that extends tool life in high-heat applications. The two-flute, right-hand spiral configuration with a 30-degree helix angle supports both roughing and finishing passes. Part of the OSG 402BN series, this tool is built to consistent tolerances and is suited for machining centers and CNC milling setups across production and job shop environments.\u003c\/p\u003e\u003cp\u003eThis end mill is rated for use in steel, stainless steel, cast iron, aluminum and non-ferrous metals, hardened materials, and high-temperature alloys. The single-end, centercutting design allows plunge entry and is well-suited to slot milling, profiling, and contour work on complex part geometries. The straight cylindrical 3\/8-inch shank fits standard collet chucks and end mill holders common in machine shops. Standard-length configuration makes it a general-purpose choice for workpieces that do not require extended reach.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e21\/64-inch ball nose diameter with 0.1641-inch nose radius for accurate profiled surfaces\u003c\/li\u003e\n\u003cli\u003eTiAlN PVD coating for heat resistance and extended tool life in ferrous and hardened materials\u003c\/li\u003e\n\u003cli\u003e2-flute, right-hand cut, right-hand spiral at 30-degree helix for chip evacuation and surface finish\u003c\/li\u003e\n\u003cli\u003eCentercutting geometry allows direct plunge milling without a pre-drilled entry hole\u003c\/li\u003e\n\u003cli\u003eSolid carbide construction for rigidity and dimensional stability under cutting loads\u003c\/li\u003e\n\u003cli\u003eCompatible with steel, stainless steel, cast iron, aluminum, high-temp alloys, and hardened materials\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned for use in CNC machining centers and manual mills equipped with standard collet chucks or end mill holders accepting a 3\/8-inch straight cylindrical shank. Suitable for roughing and finishing applications across the OSG 402BN series tool program.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation should be performed by a qualified machinist or CNC tooling technician. Ensure the machine spindle is fully stopped and locked out before changing tooling. Seat the shank fully into the collet or tool holder to the recommended grip depth and torque the retention hardware per the holder manufacturer specification. Verify runout with a dial indicator before beginning the cut, and confirm feeds and speeds are appropriate for the workpiece material and depth of cut.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMill Diameter\u003c\/strong\u003e: 21\/64 inches (0.3281 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength of Cut\u003c\/strong\u003e: 7\/8 inches (0.8750 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 2-1\/2 inches (2.5000 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 3\/8 inches (0.3750 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNose Radius\u003c\/strong\u003e: 0.1641 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Flutes\u003c\/strong\u003e: 2\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: Spiral\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Type\u003c\/strong\u003e: Straight Cylindrical\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting Direction\u003c\/strong\u003e: Right Hand\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnd Mill Material\u003c\/strong\u003e: Solid Carbide\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating\u003c\/strong\u003e: TiAlN (PVD)\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\u003eCentercutting\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\u003eVariable Helix\u003c\/strong\u003e: No\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExtended Reach\u003c\/strong\u003e: No\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMill Diameter Tolerance\u003c\/strong\u003e: +0.0000 \/ -0.0020 inches\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, Aluminum and Non-Ferrous, Hardened Materials\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: 402BN\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.1 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: OSG\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 402-3281-BN11\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"OSG","offers":[{"title":"Default Title","offer_id":51733782626610,"sku":"402-3281-BN11","price":77.03,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/9a4606544a59ac4c261762f1b7031376.jpg?v=1788759214","url":"https:\/\/voomisupply.com\/products\/osg-402-3281-bn11-ball-end-mill-21-64-in-2-flute-carbide","provider":"Voomi Supply","version":"1.0","type":"link"}