{"product_id":"osg-hp400-2500-square-end-mill-4-flute-solid-carbide","title":"Osg HP400-2500 Square End Mill 4 Flute Solid Carbide","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe OSG HP400-2500 is a solid carbide square end mill designed for high-performance milling in ferrous and non-ferrous materials. With a 0.25 inch cutting diameter, 0.75 inch length of cut, and a 30-degree helix angle, it delivers sharp, efficient chip evacuation across a range of machining applications. The TiAlN (Titanium Aluminum Nitride) coating improves heat resistance and extends tool life at elevated cutting speeds. Four spiral flutes and a centercutting geometry allow for both peripheral and plunge cutting. This end mill is sized for a 0.25 inch shank and has an overall length of 2.5 inches. It is suited for CNC machining centers and manual mills used by tool-and-die, production, and maintenance machinists.\u003c\/p\u003e\u003cp\u003eThe HP400-2500 is built for right-hand cut, right-hand flute operation in regular-length applications. The 0.75 inch length of cut makes it well suited for slotting, profiling, and contouring in moderate-depth passes. The single-end configuration and TiAlN finish make it a go-to choice for shops running ferrous alloys, stainless steel, and hardened materials where heat buildup is a concern. Machinists working in general manufacturing, tool rooms, and job shops will find this geometry reliable for both roughing and semi-finish work.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e0.25 inch cutting diameter with 0.75 inch length of cut for controlled depth passes\u003c\/li\u003e\n\u003cli\u003e4-flute spiral geometry for improved surface finish and material removal rate\u003c\/li\u003e\n\u003cli\u003eTiAlN coating for heat resistance and extended tool life at high cutting speeds\u003c\/li\u003e\n\u003cli\u003e30-degree helix angle promotes smooth chip flow and reduced cutting forces\u003c\/li\u003e\n\u003cli\u003eCentercutting design enables plunge cutting and ramp entry\u003c\/li\u003e\n\u003cli\u003eRight-hand cut, right-hand flute configuration for standard CNC and manual mill spindles\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as a standard OEM-style replacement or direct-use solid carbide square end mill for 0.25 inch collets, end mill holders, and shrink-fit toolholders on CNC machining centers and manual milling machines.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation should be performed by a qualified machinist following shop safety protocols. Ensure the spindle is fully stopped and machine is powered down before changing tooling. Use a properly sized collet or toolholder that matches the 0.25 inch shank diameter and torque the retention nut to the toolholder manufacturer's specification. Verify runout with a dial indicator after installation before beginning a cutting operation.\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 (LOC)\u003c\/strong\u003e: 0.75 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 0.25 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length (OAL)\u003c\/strong\u003e: 2.5 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\u003eFlute Type\u003c\/strong\u003e: Spiral\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCut 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 Type\u003c\/strong\u003e: Single End, Centercutting\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating\u003c\/strong\u003e: TiAlN\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Solid Carbide\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength Type\u003c\/strong\u003e: Regular\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: HP400-2500\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"OSG","offers":[{"title":"Default Title","offer_id":51734691709234,"sku":"HP400-2500","price":77.51,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/c82ae3822b81cdf3927c92c1336dd127.jpg?v=1788764958","url":"https:\/\/voomisupply.com\/products\/osg-hp400-2500-square-end-mill-4-flute-solid-carbide","provider":"Voomi Supply","version":"1.0","type":"link"}