{"product_id":"osg-402-3281-square-end-mill-21-64-in-2-flute-carbide","title":"Osg 402-3281 Square End Mill 21\/64 in 2 Flute Carbide","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe OSG 402-3281 is a solid carbide square end mill designed for precision milling operations in metalworking and machining environments. It features a 21\/64 inch (0.3281 inch) cutting diameter, a 7\/8 inch length of cut, and a 3\/8 inch shank diameter, with an overall length of 2-1\/2 inches. The two-flute, spiral configuration with a 30-degree helix angle promotes efficient chip evacuation and clean cutting performance. Micrograin carbide construction provides rigidity and wear resistance suited to close-tolerance work. This end mill is center-cutting, allowing direct plunge entry into workpiece material without a pre-drilled hole.\u003c\/p\u003e\u003cp\u003eThe 402-3281 is built for use in CNC machining centers and manual milling machines handling ferrous and non-ferrous materials. Its regular-length geometry and right-hand cut with right-hand flute make it a standard choice for slotting, profiling, and peripheral milling in production and job-shop settings. The uncoated finish makes it well suited for applications where lubrication or coolant is used to manage heat and extend tool life. Machinists and toolroom technicians working in general-purpose milling applications will find this a reliable single-end option.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e21\/64 inch cutting diameter (0.3281 inch) for close-tolerance milling\u003c\/li\u003e\n\u003cli\u003eSolid micrograin carbide construction for rigidity and wear resistance\u003c\/li\u003e\n\u003cli\u003e2-flute spiral design with 30-degree helix angle for efficient chip evacuation\u003c\/li\u003e\n\u003cli\u003eCenter-cutting capable — supports direct plunge milling without pre-drilling\u003c\/li\u003e\n\u003cli\u003eRight-hand cut, right-hand flute orientation — standard CNC setup\u003c\/li\u003e\n\u003cli\u003eUncoated finish compatible with coolant-assisted machining\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as a general-purpose replacement or production end mill for standard 3\/8 inch collets and end mill holders in CNC and manual milling machines. Part of the OSG Series 402 regular-length square end mill line.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation is performed by qualified machinists or toolroom personnel. Secure the 3\/8 inch shank in a properly sized collet or end mill holder and torque to the machine manufacturer's specification. Ensure the spindle and machine are fully powered down and locked out before changing tooling. Verify runout with a dial indicator after mounting to confirm concentricity before beginning a cut.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMill Diameter\u003c\/strong\u003e: 21\/64 inch (0.3281 inch)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength of Cut\u003c\/strong\u003e: 7\/8 inch (0.8750 inch)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 3\/8 inch (0.3750 inch)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 2-1\/2 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\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 Mill Material\u003c\/strong\u003e: Solid Carbide (Micrograin)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCenter Cutting\u003c\/strong\u003e: Yes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating\u003c\/strong\u003e: Uncoated\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: 402\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\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"OSG","offers":[{"title":"Default Title","offer_id":51738866975026,"sku":"402-3281","price":57.43,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/ba3e5e2709681d9445082f7146b46c12.jpg?v=1788805813","url":"https:\/\/voomisupply.com\/products\/osg-402-3281-square-end-mill-21-64-in-2-flute-carbide","provider":"Voomi Supply","version":"1.0","type":"link"}