{"product_id":"osg-hp421-0781-square-end-mill-5-64-in-2-flute-solid-carbide","title":"Osg HP421-0781 Square End Mill 5\/64 in 2 Flute Solid Carbide","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe OSG HP421-0781 is a solid carbide square end mill designed for precision milling in demanding machining environments. With a 5\/64 inch (0.0781 inch) cutting diameter and a 1\/4 inch length of cut, this tool handles slotting, profiling, and peripheral milling operations in tight geometries. The 35-degree helix spiral flute geometry promotes efficient chip evacuation and reduces cutting forces. A TiAlN coating provides thermal resistance and extended tool life in ferrous and high-temperature alloy applications. Machinists and CNC operators working with close-tolerance features will find the micrograin carbide substrate and right-hand cut configuration well suited to their requirements.\u003c\/p\u003e\n\u003cp\u003eThis end mill is intended for use in CNC machining centers and manual mills where small-diameter tooling is required. Its 1\/8 inch shank diameter fits standard collets and tool holders used in production and toolroom environments. The centercutting design allows for direct plunge entry into the workpiece, making it suitable for drilling start points and ramping operations. The 1-1\/2 inch overall length keeps the tool rigid in setups where deflection must be minimized at small diameters.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e5\/64 inch (0.0781 inch) cutting diameter for small-feature milling\u003c\/li\u003e\n  \u003cli\u003eSolid micrograin carbide substrate for rigidity and wear resistance\u003c\/li\u003e\n  \u003cli\u003eTiAlN finish for thermal protection in ferrous and high-alloy materials\u003c\/li\u003e\n  \u003cli\u003e35-degree helix spiral flute for efficient chip evacuation\u003c\/li\u003e\n  \u003cli\u003eCentercutting geometry allows direct plunge entry\u003c\/li\u003e\n  \u003cli\u003eRight-hand cut and right-hand flute configuration\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as an OSG Series HP421 small-diameter square end mill for use in standard 1\/8 inch collets and tool holders on CNC machining centers and manual milling machines.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation should be performed by a qualified machinist or CNC operator. Ensure the spindle is fully stopped and the machine is in a safe state before changing tooling. Seat the shank fully in the collet or tool holder and torque the retention mechanism to machine manufacturer specifications. At 0.0781 inch diameter, avoid excessive overhang beyond the stated length of cut to minimize deflection and tool breakage risk.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMill Diameter\u003c\/strong\u003e: 5\/64 inch (0.0781 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNumber of Flutes\u003c\/strong\u003e: 2\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLength of Cut\u003c\/strong\u003e: 1\/4 inch (0.2500 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 1\/8 inch (0.1250 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 1-1\/2 inches (1.5000 inches)\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: TiAlN\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlute Type\u003c\/strong\u003e: Spiral\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHelix Angle\u003c\/strong\u003e: 35 degrees\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\u003eCentercutting\u003c\/strong\u003e: Yes\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eExtended Reach\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\u003eSeries\u003c\/strong\u003e: HP421\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePackage Weight\u003c\/strong\u003e: 0.2 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: OSG\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: HP421-0781\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"OSG","offers":[{"title":"Default Title","offer_id":51748848337202,"sku":"HP421-0781","price":34.67,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/3c41f22d02a46e49c6e2ee118348ce92.jpg?v=1788899504","url":"https:\/\/voomisupply.com\/products\/osg-hp421-0781-square-end-mill-5-64-in-2-flute-solid-carbide","provider":"Voomi Supply","version":"1.0","type":"link"}