{"product_id":"osg-82010121-square-end-mill-1-4-in-4-flute-solid-carbide","title":"Osg 82010121 Square End Mill 1\/4 in 4 Flute Solid Carbide","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe OSG 82010121 is a solid carbide square end mill designed for precision milling in ferrous and hard materials. It features a 1\/4 inch cutting diameter, a 1 inch length of cut, and a 2-3\/4 inch overall length. The four-flute, single-end geometry combined with a variable helix angle of 42 to 44 degrees reduces chatter and improves surface finish in demanding cuts. A micrograin carbide substrate and Duarise coating provide wear resistance in steel, stainless steel, cast iron, and hardened materials. This tool is used in CNC machining centers and manual mills by machinists, toolmakers, and maintenance technicians.\u003c\/p\u003e\u003cp\u003eThe OSG 82010121 is part of the Series 8201 long-length end mill family. It is suited for slotting, peripheral milling, and profiling in steel (P), stainless steel (M), cast iron (K), and hardened materials (H). The long length of cut makes it appropriate for deeper pockets and features where standard-length end mills cannot reach. Variable index flute spacing further suppresses vibration during aggressive cuts in tough alloys. Right-hand cutting and right-hand flute direction are standard for conventional CNC and manual mill setups.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eSolid micrograin carbide construction for rigidity and wear life in ferrous materials\u003c\/li\u003e\n\u003cli\u003eVariable helix (42 to 44 degrees) and variable index flute spacing reduce chatter and harmonics\u003c\/li\u003e\n\u003cli\u003eDuarise coating provides high-temperature resistance and extended tool life in steel and hardened materials\u003c\/li\u003e\n\u003cli\u003eLong length of cut at 1 inch allows deeper pocket and profile work\u003c\/li\u003e\n\u003cli\u003eCentercutting geometry enables plunge entries\u003c\/li\u003e\n\u003cli\u003eFour flutes with right-hand cut and right-hand spiral for standard CNC applications\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned for use in steel, stainless steel, cast iron, and hardened materials per ISO material codes P, M, K, and H. Accepts standard 1\/4 inch collets, end mill holders, and shrink-fit toolholders.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation is performed by machinists using a compatible toolholder with a 1\/4 inch bore. Ensure the shank is fully seated and the toolholder is torqued per the holder manufacturer's specification before spindle engagement. Verify spindle direction is set to right-hand rotation before running. Do not exceed the recommended depth of cut or feed rate for the workpiece material and machine rigidity.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMill Diameter\u003c\/strong\u003e: 1\/4 inch (0.2500 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Flutes\u003c\/strong\u003e: 4\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength of Cut\u003c\/strong\u003e: 1 inch (1.0000 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 2-3\/4 inches (2.7500 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 1\/4 inch (0.2500 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: Duarise\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHelix Angle\u003c\/strong\u003e: 42 to 44 degrees\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\u003eCentercutting\u003c\/strong\u003e: Yes\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\u003eSingle or Double End\u003c\/strong\u003e: Single\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChipbreaker\u003c\/strong\u003e: No\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoolant Through\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 \/ -0.0008 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength Type\u003c\/strong\u003e: Long\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: 8201\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrimary Workpiece Materials\u003c\/strong\u003e: Steel, Stainless Steel, Cast Iron, Hardened Materials\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage Dimensions\u003c\/strong\u003e: 3.3 x 0.5 x 0.45 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.065 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: 82010121\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"OSG","offers":[{"title":"Default Title","offer_id":51733472084274,"sku":"82010121","price":123.57,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/5fbbeb994776336553898f12b558a2c3_da842a0c-c2e9-4feb-b5e8-50ac5ae5dee7.jpg?v=1788755714","url":"https:\/\/voomisupply.com\/products\/osg-82010121-square-end-mill-1-4-in-4-flute-solid-carbide","provider":"Voomi Supply","version":"1.0","type":"link"}