{"product_id":"accupro-12183069-corner-radius-end-mill-3-8-in-4-flute-altin","title":"Accupro 12183069 Corner Radius End Mill 3\/8 in 4 Flute Altin","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe ACCUPRO 12183069 is a solid carbide corner radius end mill designed for precision milling in demanding metal-cutting applications. It features a 3\/8-inch diameter, a 1-1\/8-inch length of cut, and a 0.015-inch corner radius that reduces stress concentration at the cutting edge and extends tool life in profiling and finishing passes. The AlTiN coating provides thermal resistance and hardness at elevated cutting temperatures, making this tool well-suited for ferrous alloys, hardened steels, and high-temp materials. With 4 flutes and a right-hand spiral, it delivers efficient chip evacuation and a quality surface finish. Machinists and CNC operators in job shops and production environments rely on tools like this for tight-tolerance work.\u003c\/p\u003e\u003cp\u003eThis end mill is intended for use in CNC machining centers and manual mills where a long-flute, single-end corner radius tool is required. The 3-inch overall length and 3\/8-inch shank diameter suit standard ER and side-lock toolholders commonly found in vertical machining centers. The centercutting geometry allows for plunge entry as well as peripheral and slot milling operations. The 40-degree helix angle promotes smooth cutting action and reduces chatter during finishing cuts on contoured surfaces and pockets.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e0.015-inch corner radius reduces edge chipping and stress risers on finished surfaces\u003c\/li\u003e\n\u003cli\u003eAlTiN coating provides high-temperature hardness and oxidation resistance for dry or minimal-lubrication cutting\u003c\/li\u003e\n\u003cli\u003eMicrograin solid carbide substrate delivers rigidity and wear resistance\u003c\/li\u003e\n\u003cli\u003e4-flute, right-hand spiral geometry with 40-degree helix for smooth chip flow and surface finish\u003c\/li\u003e\n\u003cli\u003eCentercutting design supports plunge milling entry\u003c\/li\u003e\n\u003cli\u003eLong flute length of 1-1\/8 inches accommodates deeper axial cuts in a single pass\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as a standard solid carbide corner radius end mill with a 3\/8-inch shank, compatible with ER collet chucks, shrink-fit holders, and side-lock toolholders accepting 3\/8-inch shank tooling on CNC and manual milling machines.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation should be performed by a qualified machinist or CNC operator. Ensure the spindle is fully stopped and the machine is in a safe, locked-out state before changing tooling. Seat the shank to the full recommended gauge depth in the holder and torque the collet nut or set screw to the toolholder manufacturer's specification. Inspect the corner radius and cutting edges for chips or wear before each use, and confirm runout with a dial indicator when tight tolerances are required.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMill Diameter\u003c\/strong\u003e: 3\/8 inches (0.3750 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 3\/8 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength of Cut\u003c\/strong\u003e: 1-1\/8 inches (1.1250 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 3 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 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\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\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\u003eFlute Type\u003c\/strong\u003e: Spiral\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength Type\u003c\/strong\u003e: Long\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\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\u003eWeight\u003c\/strong\u003e: 0.16 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: 12183069\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ACCUPRO","offers":[{"title":"Default Title","offer_id":51729151394098,"sku":"12183069","price":83.49,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/c3029eedeeb6aab327b5ff30c6efa32f.jpg?v=1788700935","url":"https:\/\/voomisupply.com\/products\/accupro-12183069-corner-radius-end-mill-3-8-in-4-flute-altin","provider":"Voomi Supply","version":"1.0","type":"link"}