{"product_id":"accupro-31857238-ball-end-mill-3-8-in-4-flute-solid-carbide","title":"Accupro 31857238 Ball End Mill 3\/8 in 4 Flute Solid Carbide","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe ACCUPRO 31857238 is a solid carbide ball end mill designed for precision milling operations in metalworking and machining applications. With a 3\/8 inch (0.3750 inch) mill diameter and a 0.3490 inch length of cut, this single-end tool delivers controlled material removal in contoured and profiled surfaces. The four-flute geometry paired with a variable index design reduces harmonic vibration during cuts, improving surface finish and tool life. An AlTiCrN coating provides heat and wear resistance, making this end mill well suited for hardened steels, stainless alloys, and other abrasive materials encountered in production and job-shop environments. Licensed machinists and CNC programmers are the primary users.\u003c\/p\u003e\u003cp\u003eThis ball end mill is built for CNC machining centers and manual mills in both shop and production settings. It is used in die-and-mold work, contour milling, profiling, and 3D surfacing where a full-radius cutting edge is required. The 3\/8 inch shank diameter fits standard ER collets, shrink-fit holders, and side-lock adapters common to most machining centers. The 2.5 inch overall length provides adequate reach for moderate-depth cavities without excessive tool deflection. This tool is appropriate for aerospace, automotive, and general precision-machining work.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eSolid carbide construction for rigidity and wear resistance in demanding cuts\u003c\/li\u003e\n\u003cli\u003eAlTiCrN coating extends tool life in hardened steels and abrasive alloys\u003c\/li\u003e\n\u003cli\u003eVariable index flute spacing reduces chatter and improves surface finish\u003c\/li\u003e\n\u003cli\u003eFour-flute design balances chip evacuation with cutting edge strength\u003c\/li\u003e\n\u003cli\u003eSingle-end configuration with 3\/8 inch shank fits standard collet and toolholder systems\u003c\/li\u003e\n\u003cli\u003eBall nose profile enables full-radius contour and 3D surface milling\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-style replacement and standard tooling option for CNC machining centers and manual milling machines that accept a 3\/8 inch shank diameter end mill.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation is performed by a qualified machinist or CNC setup technician. Ensure the machine spindle is fully stopped and locked out before inserting or removing tooling. Seat the shank fully into the collet or toolholder and torque the retention hardware per the toolholder manufacturer specifications. Inspect the cutting edges and coating condition before each use; do not run chipped or visibly worn tooling.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMill Diameter\u003c\/strong\u003e: 0.3750 inches (3\/8 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength of Cut\u003c\/strong\u003e: 0.3490 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 2.5 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 0.3750 inches (3\/8 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNeck Length\u003c\/strong\u003e: 0.5000 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Flutes\u003c\/strong\u003e: 4\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnd Mill Material\u003c\/strong\u003e: Solid Carbide\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating\u003c\/strong\u003e: AlTiCrN\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVariable Index\u003c\/strong\u003e: Yes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVariable Helix\u003c\/strong\u003e: No\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSingle or Double End\u003c\/strong\u003e: Single\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage Quantity\u003c\/strong\u003e: 1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.136 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUNSPSC Code\u003c\/strong\u003e: 27112803\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eStandard Information\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: ACCUPRO\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 31857238\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ACCUPRO","offers":[{"title":"Default Title","offer_id":51736820449586,"sku":"31857238","price":174.9,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/e0e1361feed3d5a9cd4b5815e6454c6f.jpg?v=1788780752","url":"https:\/\/voomisupply.com\/products\/accupro-31857238-ball-end-mill-3-8-in-4-flute-solid-carbide","provider":"Voomi Supply","version":"1.0","type":"link"}