{"product_id":"osg-5273100-3-4-inch-2-flute-cobalt-square-end-mill","title":"Osg 5273100 3\/4 Inch 2 Flute Cobalt Square End Mill","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe OSG 5273100 is a cobalt square end mill designed for milling operations that demand durability and heat resistance beyond standard high-speed steel tooling. Built from M42 cobalt steel, this end mill features a 0.750 inch cutting diameter, a 1.625 inch length of cut, and a 30-degree spiral helix angle. It is centercutting, allowing direct plunge entry into workpieces. The right-hand cut and right-hand flute configuration suits standard spindle setups. With a 5.375 inch overall length and 0.750 inch shank diameter, this tool fits directly into standard ER or end mill holders. Machinists and tool-and-die professionals install this type of tooling on vertical and horizontal CNC mills as well as manual knee mills.\u003c\/p\u003e\u003cp\u003eThis end mill is suited for general-purpose slot milling, profiling, and pocketing on ferrous and non-ferrous materials where cobalt tooling is preferred over carbide for toughness and regrindability. The two-flute geometry provides good chip clearance in slotting applications and softer materials. The uncoated finish makes it straightforward to regrind in-house. It falls within OSG Series 527, a regular-length product line intended for standard reach milling work. A 3.375 inch reach length accommodates moderate-depth features without requiring extended tooling setups.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eM42 cobalt steel construction for improved heat and wear resistance over standard HSS\u003c\/li\u003e\n\u003cli\u003eCentercutting design allows direct plunge milling without pre-drilling\u003c\/li\u003e\n\u003cli\u003e30-degree helix angle promotes smooth chip evacuation and reduces cutting forces\u003c\/li\u003e\n\u003cli\u003eTwo-flute geometry maximizes chip clearance in slotting and deep-pocket applications\u003c\/li\u003e\n\u003cli\u003eUncoated finish supports in-house regrinding to extend tool life\u003c\/li\u003e\n\u003cli\u003eRight-hand cut and right-hand flute — compatible with standard CNC and manual mill spindles\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-style cutting tool for use in standard 3\/4 inch end mill holders, collet chucks, and ER-style toolholders on vertical and horizontal milling machines. Part of OSG Series 527 regular-length square end mills.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation and tool changes should be performed with the machine powered off and the spindle fully stopped. Secure the shank fully within the holder to the recommended gauge line before torquing the set screw or collet nut. Machinists should verify runout with a dial indicator after mounting to prevent premature edge wear. Follow the machine tool manufacturer guidelines and applicable shop safety standards when setting feeds and speeds for cobalt tooling.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMill Diameter\u003c\/strong\u003e: 0.750 inches (3\/4 inch)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength of Cut\u003c\/strong\u003e: 1.625 inches (1-5\/8 inch)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 5.375 inches (5-3\/8 inch)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 0.750 inches (3\/4 inch)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReach Length\u003c\/strong\u003e: 3.375 inches (3-3\/8 inch)\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\u003eEnd Mill Material\u003c\/strong\u003e: Cobalt\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial Grade\u003c\/strong\u003e: M42\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: Regular\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: 527\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: 5273100\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"OSG","offers":[{"title":"Default Title","offer_id":51746065416498,"sku":"5273100","price":137.19,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/f2e50d1041e33e8fad44fe28db4417f1.jpg?v=1788866425","url":"https:\/\/voomisupply.com\/products\/osg-5273100-3-4-inch-2-flute-cobalt-square-end-mill","provider":"Voomi Supply","version":"1.0","type":"link"}