{"product_id":"accupro-12178650-corner-radius-end-mill-1-4-in-5-flute-altin","title":"Accupro 12178650 Corner Radius End Mill 1\/4 in 5 Flute Altin","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe ACCUPRO 12178650 is a single-end, corner radius end mill ground from micrograin solid carbide and coated with AlTiN (aluminum titanium nitride) for high-temperature cutting performance. It carries a 1\/4-inch cutting diameter, a 3\/8-inch length of cut, and a 0.015-inch corner radius that reduces edge chipping on workpiece corners. Five right-hand spiral flutes with a variable index configuration minimize harmonic vibration during aggressive milling passes. Designed for machinists and tool-and-die professionals running CNC machining centers, this end mill handles hardened steels, stainless, and cast iron where heat resistance and edge retention are critical.\u003c\/p\u003e\u003cp\u003eThis end mill is suited for finish and semi-finish milling operations in job shops, production facilities, and tool rooms. The centercutting geometry allows plunge entry directly into the workpiece, adding flexibility for pocket milling, slotting, and profiling. The 1\/4-inch shank fits standard ER collet chucks and end mill holders common on vertical and horizontal machining centers. The 2-inch overall length provides adequate reach for most shallow-pocket and contour work without excessive overhang.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e0.015-inch corner radius reduces stress concentration and extends tool life at workpiece edges\u003c\/li\u003e\n\u003cli\u003eAlTiN coating provides oxidation resistance and hardness at elevated cutting temperatures\u003c\/li\u003e\n\u003cli\u003e5-flute, variable-index design dampens chatter for improved surface finish\u003c\/li\u003e\n\u003cli\u003eCentercutting end geometry enables direct plunge milling without a pre-drilled entry hole\u003c\/li\u003e\n\u003cli\u003eMicrograin solid carbide substrate delivers consistent edge sharpness and rigidity\u003c\/li\u003e\n\u003cli\u003eRight-hand cut and right-hand spiral flute direction for standard CNC spindle compatibility\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-style replacement or direct-fit tooling option for 1\/4-inch shank end mill holders and ER collet systems on standard CNC machining centers.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation should be performed by a qualified machinist or CNC operator. Secure the shank fully within the collet or end mill holder to the recommended gauge-line depth before torquing the retention nut. Verify spindle runout with a test indicator after tool installation to protect the corner radius geometry. Follow the machine tool manufacturer guidelines and applicable shop safety procedures when changing rotating tooling.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMill Diameter\u003c\/strong\u003e: 0.250 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength of Cut\u003c\/strong\u003e: 0.375 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCorner Radius\u003c\/strong\u003e: 0.015 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCorner Radius Tolerance\u003c\/strong\u003e: plus or minus 0.00150 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMill Diameter Tolerance\u003c\/strong\u003e: +0.000000 \/ -0.002500 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Flutes\u003c\/strong\u003e: 5\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 2.0 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 0.250 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Diameter Tolerance\u003c\/strong\u003e: -0.0001 \/ -0.0004 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnd Mill Material\u003c\/strong\u003e: Micrograin Solid Carbide\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating\u003c\/strong\u003e: AlTiN\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHelix Angle\u003c\/strong\u003e: 40 degrees\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlute Type\u003c\/strong\u003e: Spiral\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlute Direction\u003c\/strong\u003e: Right Hand\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting Direction\u003c\/strong\u003e: Right Hand\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnd Type\u003c\/strong\u003e: Corner Radius\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSingle or Double End\u003c\/strong\u003e: Single\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCentercutting\u003c\/strong\u003e: Yes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVariable Index\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\u003eWeight\u003c\/strong\u003e: 0.5 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: ACCUPRO\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 12178650\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ACCUPRO","offers":[{"title":"Default Title","offer_id":51733708702002,"sku":"12178650","price":47.7,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/930d8963cb6b1ac3112a623721a76607.jpg?v=1788758616","url":"https:\/\/voomisupply.com\/products\/accupro-12178650-corner-radius-end-mill-1-4-in-5-flute-altin","provider":"Voomi Supply","version":"1.0","type":"link"}