{"product_id":"accupro-14556379-corner-radius-end-mill-1-4-in-4-flute","title":"Accupro 14556379 Corner Radius End Mill 1\/4 in 4 Flute","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe ACCUPRO 14556379 is a solid carbide corner radius end mill designed for precision milling operations in ferrous and non-ferrous materials. With a 0.25-inch mill diameter and a 0.03-inch corner radius, this tool produces radiused edges that reduce stress concentration and extend workpiece life. The AlTiN+ coating provides high-temperature resistance and improved wear resistance, making it suitable for dry or near-dry machining. It features 4 spiral flutes in a right-hand cutting direction with centercutting capability, allowing plunge entry. The 40-degree helix angle promotes efficient chip evacuation in deeper passes. Machinists and tool-and-die professionals install this end mill in CNC machining centers and manual knee mills.\u003c\/p\u003e\u003cp\u003eThis end mill is suited for finish and semi-finish milling in metals including alloy steels, tool steels, and hardened materials where corner integrity matters. The 0.75-inch length of cut and 2.5-inch overall length make it practical for shallow-to-moderate depth pocketing, profiling, and contouring operations. It is a single-end, straight-cylindrical shank tool, fitting standard 1\/4-inch ER collets and end mill holders without modification. It belongs to ACCUPRO Series 6\/44 and is built to a micrograin carbide grade for toughness at elevated cutting speeds.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e0.03-inch corner radius reduces edge chipping and stress risers on finished surfaces\u003c\/li\u003e\n\u003cli\u003eAlTiN+ coating extends tool life in high-temperature cutting applications\u003c\/li\u003e\n\u003cli\u003e4 right-hand spiral flutes with centercutting geometry allow plunge milling\u003c\/li\u003e\n\u003cli\u003e40-degree helix angle promotes chip flow and reduces cutting forces\u003c\/li\u003e\n\u003cli\u003eMicrograin solid carbide substrate delivers hardness and edge retention\u003c\/li\u003e\n\u003cli\u003eStraight-cylindrical 1\/4-inch shank fits standard ER collet and end mill holder tooling\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-style replacement and standard production end mill for CNC machining centers and manual mills accepting 1\/4-inch straight-shank toolholders or ER collet systems.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation should be performed by a qualified machinist or tooling technician. Ensure the spindle is fully stopped and the machine is powered down before changing tooling. Use a properly sized ER collet or end mill holder torqued to the toolholder manufacturer's specification. Inspect the shank and collet bore for chips or contamination before seating to prevent runout that can damage the cutting edge.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMill Diameter\u003c\/strong\u003e: 0.25 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCorner Radius\u003c\/strong\u003e: 0.03 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: 0.75 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: 0.25 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHelix Angle\u003c\/strong\u003e: 40 degrees\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating\u003c\/strong\u003e: AlTiN+\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\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\u003eShank Type\u003c\/strong\u003e: Straight-Cylindrical\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCorner Radius Tolerance\u003c\/strong\u003e: plus or minus 0.001 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMill Diameter Tolerance\u003c\/strong\u003e: +0.000 \/ -0.002 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\u003eSeries\u003c\/strong\u003e: 6\/44\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.05 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: 14556379\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ACCUPRO","offers":[{"title":"Default Title","offer_id":51744538788146,"sku":"14556379","price":74.75,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/000d9732e157f0192696d3c41879a853.jpg?v=1788857769","url":"https:\/\/voomisupply.com\/products\/accupro-14556379-corner-radius-end-mill-1-4-in-4-flute","provider":"Voomi Supply","version":"1.0","type":"link"}