{"product_id":"accupro-12183279-corner-radius-end-mill-3-8-in-4-flute","title":"Accupro 12183279 Corner Radius End Mill 3\/8 in 4 Flute","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe ACCUPRO 12183279 is a solid carbide corner radius end mill designed for precision milling operations requiring a controlled edge radius. Built from micrograin solid carbide, it delivers the rigidity and wear resistance needed for cutting ferrous and non-ferrous materials in CNC machining centers and manual mills. The 0.015-inch corner radius reduces stress concentration at the cutting edge, extending tool life in slotting, profiling, and peripheral milling applications. With 4 flutes and a 40-degree helix angle, it balances chip evacuation with surface finish quality. The bright, uncoated finish makes it well suited for applications where coating-induced dimensional buildup must be avoided.\u003c\/p\u003e\u003cp\u003eThis end mill is intended for use in production and job-shop machining environments where extra-long reach is required. The 1-3\/4-inch length of cut (LOC) and 4-inch overall length (OAL) allow access to deeper pockets and stepped features that shorter tools cannot reach. It is a single-end, center-cutting design, meaning it can plunge directly into a workpiece as well as cut laterally. Machinists and CNC programmers working in aerospace, mold and die, and general metalworking will find this tool applicable to a wide range of roughing and finishing passes.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e0.015-inch corner radius reduces edge chipping and stress concentration at cutting corners\u003c\/li\u003e\n\u003cli\u003eMicrograin solid carbide construction provides hardness and dimensional stability under thermal load\u003c\/li\u003e\n\u003cli\u003e4-flute, right-hand spiral geometry balances material removal rate with surface finish\u003c\/li\u003e\n\u003cli\u003e40-degree helix angle promotes smooth chip flow and reduces cutting forces\u003c\/li\u003e\n\u003cli\u003eCenter-cutting capability allows direct plunge entry without pre-drilling\u003c\/li\u003e\n\u003cli\u003eBright, uncoated finish maintains tight dimensional tolerances without coating buildup\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as a standard shank corner radius end mill compatible with 3\/8-inch collets, end mill holders, and shrink-fit toolholders commonly 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 or CNC tooling technician. Ensure the spindle is fully stopped and the machine is in a safe, locked-out state before changing tooling. Seat the 3\/8-inch shank fully into the holder to the recommended gauge line and torque the retention hardware per the toolholder manufacturer specifications. Inspect the corner radius and cutting edges for chips or damage before each use, as carbide tools are brittle and sensitive to improper handling or excessive runout.\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 (LOC)\u003c\/strong\u003e: 1-3\/4 inches (1.0000 inches decimal)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length (OAL)\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 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 End\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 \/ Finish\u003c\/strong\u003e: Bright \/ Uncoated\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: 0.22 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: 12183279\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ACCUPRO","offers":[{"title":"Default Title","offer_id":51735264035122,"sku":"12183279","price":161.58,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/3f3ef899ca39c67c7650db63ea6f4694.jpg?v=1788771179","url":"https:\/\/voomisupply.com\/products\/accupro-12183279-corner-radius-end-mill-3-8-in-4-flute","provider":"Voomi Supply","version":"1.0","type":"link"}