{"product_id":"accupro-12180556-corner-radius-end-mill-1-4-in-4-flute-altin","title":"Accupro 12180556 Corner Radius End Mill 1\/4 in 4 Flute Altin","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe ACCUPRO 12180556 is a solid carbide corner radius end mill designed for precision milling in demanding machining environments. Built from micrograin carbide and coated with AlTiN (aluminum titanium nitride), it handles high-heat, high-speed cutting in hardened steels, stainless, cast iron, and exotic alloys. The 0.02 inch corner radius reduces stress concentration at the cutting edge and extends tool life in finish and semi-finish passes. With a 1\/4 inch diameter, 3\/8 inch length of cut, and 2 inch overall length, this is a compact, high-performance tool suited for CNC machining centers and manual mills where tight tolerances are required. Installed and operated by machinists and tool-and-die professionals.\u003c\/p\u003e\n\u003cp\u003eThis end mill is sized for light to medium material removal in ferrous and non-ferrous metals. The 4-flute, single-end, centercutting geometry allows plunge entry and supports both slotting and profiling operations. The right-hand flute spiral and right-hand cutting direction are standard for conventional CNC milling setups. Variable index flute spacing helps reduce harmonic chatter during extended cuts. The 1\/4 inch shank diameter fits standard collets and end mill holders commonly found in vertical machining centers and high-speed spindle applications.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eMicrograin solid carbide substrate for increased hardness and wear resistance\u003c\/li\u003e\n  \u003cli\u003eAlTiN coating supports high-temperature cutting without coolant in many applications\u003c\/li\u003e\n  \u003cli\u003e0.02 inch corner radius reduces edge chipping and improves surface finish at floor transitions\u003c\/li\u003e\n  \u003cli\u003eCentercutting design allows direct plunge milling\u003c\/li\u003e\n  \u003cli\u003eVariable index flute geometry reduces vibration and chatter\u003c\/li\u003e\n  \u003cli\u003eRight-hand cut, right-hand spiral — compatible with standard CNC mill configurations\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned for use in standard 1\/4 inch collets, ER collet chucks, and end mill holders on CNC vertical machining centers and manual knee mills. Suited for machining hardened steels, stainless steel, cast iron, titanium, and high-temperature alloys where AlTiN coating performance is advantageous.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation is performed by a machinist or CNC setup technician. Secure the shank fully within the collet or end mill holder to the recommended engagement depth before tightening — insufficient shank engagement is a leading cause of tool pull-out. Ensure the spindle and machine are in a safe, locked-out state before changing tooling. Do not exceed the tool manufacturer's recommended speeds and feeds for the workpiece material and coating type.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMill Diameter\u003c\/strong\u003e: 1\/4 inch (0.2500 inch)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 1\/4 inch\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLength of Cut\u003c\/strong\u003e: 3\/8 inch (0.3750 inch)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 2 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCorner Radius\u003c\/strong\u003e: 0.02 inch\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 (Micrograin)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoating\u003c\/strong\u003e: AlTiN\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEnd Type\u003c\/strong\u003e: Corner Radius\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\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\u003eCorner Radius Tolerance\u003c\/strong\u003e: 0.00150 inch\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMill Diameter Tolerance\u003c\/strong\u003e: +0.000000 \/ -0.002500 inch\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Diameter Tolerance\u003c\/strong\u003e: -0.0001 \/ -0.0004 inch\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.5 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: ACCUPRO\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 12180556\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ACCUPRO","offers":[{"title":"Default Title","offer_id":51734672212274,"sku":"12180556","price":49.68,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/02d23db0efe4a0e0dc620f740875ba9e.jpg?v=1788764659","url":"https:\/\/voomisupply.com\/products\/accupro-12180556-corner-radius-end-mill-1-4-in-4-flute-altin","provider":"Voomi Supply","version":"1.0","type":"link"}