{"product_id":"osg-82010321-square-end-mill-5-16-in-4-flute-solid-carbide","title":"Osg 82010321 Square End Mill 5\/16 in 4 Flute Solid Carbide","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe OSG 82010321 is a solid carbide square end mill designed for precision milling operations in metal and engineered materials. Built to Series 8201 specifications, it features a 0.3125 inch (5\/16 inch) cutting diameter, a 1.25 inch length of cut, and a 3.5 inch overall length, placing it in the long-series category for extended-reach applications. The four-flute, straight-flute geometry with right-hand cut and right-hand flute direction suits general-purpose profiling, slotting, and peripheral milling. The Duarise coating combined with micrograin carbide substrate supports extended tool life in demanding cutting conditions. This end mill is center-cutting, allowing plunge entry without a pre-drilled pilot hole.\u003c\/p\u003e\u003cp\u003eThe OSG 82010321 is suited for CNC machining centers and manual mills running ferrous and non-ferrous workpieces where a long-reach, small-diameter end mill is required. The variable helix and variable index design help reduce chatter and harmonic vibration at higher feed rates, making it a practical choice for finishing passes as well as roughing in stable setups. Machinists and tool-and-die shops running tight-tolerance work will benefit from the close mill diameter tolerance of plus 0.0000 \/ minus 0.0008 inch.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eSolid micrograin carbide construction for rigidity and wear resistance\u003c\/li\u003e\n\u003cli\u003eDuarise coating for improved surface finish and tool life\u003c\/li\u003e\n\u003cli\u003eVariable helix and variable index geometry to minimize vibration and chatter\u003c\/li\u003e\n\u003cli\u003eCenter-cutting design allows direct plunge entry\u003c\/li\u003e\n\u003cli\u003eLong-series length with 1.25 inch LOC for extended-reach milling\u003c\/li\u003e\n\u003cli\u003eRight-hand cut, straight flute with close diameter tolerance of plus 0.0000 \/ minus 0.0008 inch\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-style replacement or direct-application solid carbide square end mill within the OSG Series 8201 family, compatible with standard 5\/16 inch collet or end mill holders on CNC and manual milling machines.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation is performed by qualified machinists or CNC setup technicians. Secure the shank fully into a properly sized collet or end mill holder and torque to the machine tool manufacturer specification. Verify runout with a dial indicator before beginning cuts. Always power down the spindle and confirm it has come to a complete stop before changing or inspecting tooling.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMill Diameter\u003c\/strong\u003e: 0.3125 inches (5\/16 inch)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength of Cut\u003c\/strong\u003e: 1.25 inches (1-1\/4 inch)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 0.3125 inches (5\/16 inch)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 3.5 inches (3-1\/2 inch)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Flutes\u003c\/strong\u003e: 4\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\/Finish\u003c\/strong\u003e: Duarise\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlute Type\u003c\/strong\u003e: Straight\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\u003eVariable Helix\u003c\/strong\u003e: Yes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVariable Index\u003c\/strong\u003e: Yes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCenter Cutting\u003c\/strong\u003e: Yes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChipbreaker\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\u003eLength Type\u003c\/strong\u003e: Long\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMill Diameter Tolerance\u003c\/strong\u003e: plus 0.0000 \/ minus 0.0008 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: 8201\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.125 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUNSPSC Code\u003c\/strong\u003e: 27112803\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: 82010321\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"OSG","offers":[{"title":"Default Title","offer_id":51752350056754,"sku":"82010321","price":150.36,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/5fbbeb994776336553898f12b558a2c3_907a2eed-bda3-41b7-901f-3829e219c06b.jpg?v=1788927623","url":"https:\/\/voomisupply.com\/products\/osg-82010321-square-end-mill-5-16-in-4-flute-solid-carbide","provider":"Voomi Supply","version":"1.0","type":"link"}