{"product_id":"osg-5254100-square-end-mill-7-8-inch-2-flute-cobalt","title":"Osg 5254100 Square End Mill 7\/8 Inch 2 Flute Cobalt","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe OSG 5254100 is a cobalt square end mill designed for milling operations in metal cutting applications. Built to Series 525 standards, it features a 7\/8 inch diameter with a 2-1\/2 inch length of cut and a 4-3\/4 inch overall length. The two-flute, spiral flute geometry with a 30-degree helix angle promotes efficient chip evacuation and smooth cutting action. Manufactured from M42 cobalt high-speed steel, this end mill delivers heat and wear resistance suitable for demanding ferrous and non-ferrous materials. It is centercutting, allowing plunge cuts, and runs with right-hand cut and right-hand flute orientation. Supplied uncoated and ready for use.\u003c\/p\u003e\u003cp\u003eThis end mill is suited for general-purpose slot milling, side milling, and profiling operations on manual mills and CNC machining centers. The long-series length of cut makes it appropriate for deeper cavity work and extended-reach applications where a standard-length end mill cannot access the full depth of a feature. Machinists and toolroom technicians working in job shops, maintenance environments, and production settings will find this tool applicable to a wide range of steel, stainless, and alloy cutting tasks.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e7\/8 inch cutting diameter with matching 7\/8 inch shank diameter for direct collet or end mill holder fitment\u003c\/li\u003e\n\u003cli\u003e2-1\/2 inch length of cut supports deep slotting and extended-reach profiling work\u003c\/li\u003e\n\u003cli\u003eM42 cobalt HSS construction provides elevated hot hardness compared to standard M2 tooling\u003c\/li\u003e\n\u003cli\u003e30-degree helix angle spiral flute design promotes chip flow and reduces cutting forces\u003c\/li\u003e\n\u003cli\u003eCentercutting geometry enables plunge entry into workpiece material\u003c\/li\u003e\n\u003cli\u003eRight-hand cut, right-hand flute, uncoated finish — no coating prep required before use\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as a standard-shank square end mill compatible with 7\/8 inch collets, milling chucks, and end mill holders used on manual knee mills and CNC vertical machining centers.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation should be performed by a qualified machinist following shop safety procedures. Ensure the spindle is fully stopped and the machine is powered down before inserting or removing the tool from its holder. Use a properly sized collet or end mill holder and torque the retention mechanism according to the toolholder manufacturer's specifications. Verify runout with a dial indicator before beginning a cut to maximize tool life and surface finish quality.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMill Diameter\u003c\/strong\u003e: 7\/8 inch (0.8750 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength of Cut\u003c\/strong\u003e: 2-1\/2 inches (2.5000 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 7\/8 inch (0.8750 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 4-3\/4 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Flutes\u003c\/strong\u003e: 2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnd Mill Material\u003c\/strong\u003e: Cobalt (M42 HSS)\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\u003eCentercutting\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\u003eLength Type\u003c\/strong\u003e: Long\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: 525\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: 5254100\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"OSG","offers":[{"title":"Default Title","offer_id":51733762146610,"sku":"5254100","price":139.1,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/176dc9218f11d75492ab56df0c727278.jpg?v=1788758979","url":"https:\/\/voomisupply.com\/products\/osg-5254100-square-end-mill-7-8-inch-2-flute-cobalt","provider":"Voomi Supply","version":"1.0","type":"link"}