{"product_id":"accupro-12183243-corner-radius-end-mill-1-4-in-4-flute-altin","title":"Accupro 12183243 Corner Radius End Mill 1\/4 in 4 Flute Altin","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe ACCUPRO 12183243 is a solid carbide corner radius end mill designed for precision milling operations in metalworking and machining environments. It measures 0.25 inches in diameter with a 1.5-inch length of cut and a 0.015-inch corner radius, making it well suited for producing smooth transitions between floors and walls in milled pockets and profiles. The AlTiN coating provides high heat resistance and extended tool life when cutting ferrous and hardened materials. With 4 flutes, a 40-degree helix, and right-hand cutting direction, this tool balances material removal rate with surface finish quality. It is a single-end, centercutting design with a 4-inch overall length and an extra-long length type classification.\u003c\/p\u003e\u003cp\u003eThis end mill is used in CNC machining centers and manual mills for applications involving steel, stainless steel, titanium, and similar hard-to-machine alloys. The extra-long reach suits deep pocket milling, die and mold work, and part features requiring extended tool projection. It is installed and operated by machinists and CNC programmers in job shops, toolrooms, and production machining facilities. The centercutting geometry allows for plunge entry directly into the workpiece without a pre-drilled hole.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eAlTiN coating for high-temperature resistance and extended tool life in ferrous and hardened materials\u003c\/li\u003e\n\u003cli\u003e0.015-inch corner radius reduces stress concentration and improves corner durability in milled features\u003c\/li\u003e\n\u003cli\u003e4-flute, right-hand spiral design balances chip evacuation with surface finish\u003c\/li\u003e\n\u003cli\u003e40-degree helix angle promotes smooth cutting action and reduced chatter\u003c\/li\u003e\n\u003cli\u003eCentercutting geometry allows direct plunge entry without pilot drilling\u003c\/li\u003e\n\u003cli\u003eMicrograin solid carbide substrate for superior hardness and wear resistance\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-style solid carbide corner radius end mill compatible with standard 1\/4-inch collet and end mill holder systems used in CNC machining centers and manual milling machines.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation should be performed by a qualified machinist using a properly sized collet, hydraulic holder, or shrink-fit toolholder rated for the 1\/4-inch shank diameter. Ensure the machine spindle is fully stopped and locked out before inserting or removing the tool. Follow the toolholder manufacturer torque and runout specifications to avoid premature tool breakage. Refer to the cutting tool manufacturer recommended speeds and feeds for AlTiN-coated carbide end mills before programming the toolpath.\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\u003eShank Diameter\u003c\/strong\u003e: 0.25 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength of Cut\u003c\/strong\u003e: 1.5 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 4 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\u003eNumber of Flutes\u003c\/strong\u003e: 4\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHelix Angle\u003c\/strong\u003e: 40 degrees\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 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\u003eCentercutting\u003c\/strong\u003e: Yes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSingle or Double End\u003c\/strong\u003e: Single\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength Type\u003c\/strong\u003e: Extra Long\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMill Diameter Tolerance\u003c\/strong\u003e: +0.000000 to -0.002500 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Diameter Tolerance\u003c\/strong\u003e: -0.0001 to -0.0004 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCorner Radius Tolerance\u003c\/strong\u003e: 0.00150 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.1 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: 12183243\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ACCUPRO","offers":[{"title":"Default Title","offer_id":51739235909938,"sku":"12183243","price":78.76,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/055364401d19067ff81723685ffff945.jpg?v=1788811883","url":"https:\/\/voomisupply.com\/products\/accupro-12183243-corner-radius-end-mill-1-4-in-4-flute-altin","provider":"Voomi Supply","version":"1.0","type":"link"}