{"product_id":"osg-hp441-1250-square-end-mill-1-8-in-4-flute-tialn-carbide","title":"Osg HP441-1250 Square End Mill 1\/8 in 4 Flute Tialn Carbide","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe OSG HP441-1250 is a 4-flute solid carbide square end mill designed for high-performance milling in ferrous and non-ferrous materials. It measures 1\/8 inch in diameter with a 1\/2-inch length of cut and a 1-1\/2-inch overall length. The micrograin carbide substrate provides hardness and wear resistance, while the TiAlN coating extends tool life under elevated cutting temperatures. The 35-degree right-hand spiral helix promotes efficient chip evacuation and stable cutting. This tool is used by machinists and tool-and-die professionals in CNC machining centers and manual mills where tight-tolerance work in small-diameter applications is required.\u003c\/p\u003e\n\u003cp\u003eThe HP441-1250 is suited for slotting, profiling, and peripheral milling operations in precision machining environments. Its regular length configuration and 1\/8-inch shank diameter make it well-matched for use in small-bore work, mold detail work, and finishing passes where a compact, rigid tooling setup is needed. The centercutting geometry allows plunge entry, adding flexibility across milling operations without the need for a pre-drilled start hole.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e1\/8-inch mill diameter with matching 1\/8-inch shank diameter for direct collet chuck mounting\u003c\/li\u003e\n  \u003cli\u003e4-flute spiral geometry with 35-degree right-hand helix for efficient chip evacuation\u003c\/li\u003e\n  \u003cli\u003eTiAlN coating for extended tool life at elevated cutting temperatures\u003c\/li\u003e\n  \u003cli\u003eMicrograin solid carbide substrate for hardness and dimensional stability\u003c\/li\u003e\n  \u003cli\u003eCentercutting design allows plunge milling without a pre-drilled entry point\u003c\/li\u003e\n  \u003cli\u003eSingle-end, regular-length configuration suited for precision detail and finishing work\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003ePart of the OSG HP441 series. Designed for use in CNC machining centers and manual mills accepting 1\/8-inch shank tooling via ER collet, end mill holder, or equivalent workholding.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation is performed by qualified machinists or CNC setup technicians. Ensure the machine spindle and workholding are fully stopped and de-energized before changing tooling. Seat the shank fully into the collet or holder and torque the retaining nut to the workholding manufacturer's specification. Confirm runout with a dial indicator before beginning a cut, particularly important at this diameter where deflection affects dimensional accuracy.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMill Diameter\u003c\/strong\u003e: 1\/8 inch (0.1250 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNumber of Flutes\u003c\/strong\u003e: 4\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLength of Cut\u003c\/strong\u003e: 1\/2 inch (0.5000 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 1-1\/2 inches (1.5000 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 1\/8 inch (0.1250 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHelix Angle\u003c\/strong\u003e: 35 degrees\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEnd Mill Material\u003c\/strong\u003e: Solid Carbide\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial Grade\u003c\/strong\u003e: Micrograin\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoating\u003c\/strong\u003e: TiAlN\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\u003eExtended Reach\u003c\/strong\u003e: No\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eVariable Helix\u003c\/strong\u003e: No\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eChipbreaker\u003c\/strong\u003e: No\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: HP441\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.02 pounds\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eStandard Information\u003c\/h4\u003e\n\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: HP441-1250\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"OSG","offers":[{"title":"Default Title","offer_id":51752526676274,"sku":"HP441-1250","price":34.57,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/187b169978ca98f096cc57723185dd0b.jpg?v=1788928898","url":"https:\/\/voomisupply.com\/products\/osg-hp441-1250-square-end-mill-1-8-in-4-flute-tialn-carbide","provider":"Voomi Supply","version":"1.0","type":"link"}