{"product_id":"osg-444-2500-square-end-mill-0-25in-4-flute-solid-carbide","title":"Osg 444-2500 Square End Mill 0.25in 4 Flute Solid Carbide","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe OSG 444-2500 is a solid carbide square end mill designed for precision milling operations in metalworking and machining applications. It features a 0.25-inch cutting diameter, a 0.625-inch length of cut, and a 3.375-inch overall length with a 0.375-inch shank diameter. Built from micrograin solid carbide, this double-end configuration delivers consistent edge integrity and extended tool life compared to high-speed steel alternatives. The 30-degree helix angle promotes efficient chip evacuation, and the uncoated finish suits applications where coating buildup tolerance or regrinding is a factor. This tool is installed and operated by machinists and CNC operators working in job shops, production facilities, and toolrooms.\u003c\/p\u003e\u003cp\u003eThis end mill is suited for slotting, profiling, and peripheral milling in ferrous and non-ferrous materials. The centercutting geometry allows plunge entry, expanding its use in pocketing and ramping operations. The spiral flute design with right-hand cut and right-hand flute direction is standard for conventional vertical machining centers and manual mills. At regular length, the 444-2500 fits standard tool holders without extended-reach adapters. It is part of the OSG Series 444 lineup, a family of general-purpose solid carbide end mills targeting versatile shop floor use.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e0.25-inch cutting diameter with 0.625-inch length of cut for controlled milling depth\u003c\/li\u003e\n\u003cli\u003eMicrograin solid carbide construction for improved wear resistance over standard carbide grades\u003c\/li\u003e\n\u003cli\u003e30-degree helix angle supports efficient chip evacuation and reduced cutting forces\u003c\/li\u003e\n\u003cli\u003eCentercutting geometry enables plunge milling and ramp entry\u003c\/li\u003e\n\u003cli\u003eDouble-end configuration provides two usable cutting ends per tool\u003c\/li\u003e\n\u003cli\u003eUncoated finish — suitable for regrinding or applications where coatings are not required\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-style replacement and general-purpose solid carbide square end mill for standard milling operations requiring a 0.375-inch shank and 0.25-inch cutting diameter.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation and operation of this end mill should be performed by qualified machinists familiar with CNC or manual milling equipment. Ensure the machine spindle and tool holder are fully powered down and locked out before loading or removing the tool. Verify runout and concentricity of the tool holder before operation to avoid premature edge wear. Follow machine manufacturer feed and speed guidelines for carbide tooling in the workpiece material being cut.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting Diameter\u003c\/strong\u003e: 0.25 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength of Cut\u003c\/strong\u003e: 0.625 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 0.375 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 3.375 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Flutes\u003c\/strong\u003e: 4\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHelix Angle\u003c\/strong\u003e: 30 degrees\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\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\u003eConfiguration\u003c\/strong\u003e: Double End\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: 444\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.14 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: 444-2500\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"OSG","offers":[{"title":"Default Title","offer_id":51731057606962,"sku":"444-2500","price":79.38,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/102b1eea35cf49d7046beb21b82dd1a7.jpg?v=1788726380","url":"https:\/\/voomisupply.com\/products\/osg-444-2500-square-end-mill-0-25in-4-flute-solid-carbide","provider":"Voomi Supply","version":"1.0","type":"link"}