{"product_id":"accupro-12183238-corner-radius-end-mill-1-4-in-4-flute-solid-carbide","title":"Accupro 12183238 Corner Radius End Mill 1\/4 in 4 Flute Solid Carbide","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe ACCUPRO 12183238 is a solid carbide corner radius end mill designed for precision milling operations in ferrous and non-ferrous materials. It features a 0.0450 inch corner radius that reduces stress concentrations at the cutting edge and produces a consistent radiused profile in finished workpiece geometry. The TiCN coating improves surface hardness and wear resistance compared to uncoated carbide. With a 40-degree helix angle and 4-flute spiral geometry, this tool is suited for finishing and semi-finishing passes where chip evacuation and surface finish quality are priorities. Machining professionals and tool-and-die shops select this mill for applications demanding tight tolerances and extended tool life.\u003c\/p\u003e\u003cp\u003eThis end mill is built for use in CNC vertical machining centers and manual mills where extra-long reach into cavities, deep pockets, or stepped workpieces is required. The 1\/4 inch shank diameter fits standard ER collet chucks, end mill holders, and milling chucks sized for that bore. Its centercutting capability allows it to plunge directly into a workpiece without a pre-drilled hole, supporting both ramping and plunge entry strategies. It is appropriate for mold and die work, aerospace components, and general precision machining where a controlled corner radius profile is specified.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e0.0450 inch corner radius for stress-relieved edges and radiused profile cuts\u003c\/li\u003e\n\u003cli\u003eTiCN coating for increased surface hardness and extended wear resistance\u003c\/li\u003e\n\u003cli\u003e40-degree helix angle promotes smooth cutting action and efficient chip flow\u003c\/li\u003e\n\u003cli\u003e4-flute spiral geometry optimized for finishing and semi-finishing passes\u003c\/li\u003e\n\u003cli\u003eCentercutting design allows direct plunge entry without pilot drilling\u003c\/li\u003e\n\u003cli\u003eExtra-long length of cut at 1-1\/2 inches supports deep-pocket and cavity work\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-style solid carbide corner radius end mill fitting standard 1\/4 inch ER collet chucks, shrink-fit holders, and milling chucks used in CNC and manual milling machines.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation and tool changes must be performed with the spindle fully stopped and the machine control in an estop or locked-out state per applicable shop safety procedures. Secure the shank to the full recommended grip depth in the tool holder to minimize runout and avoid pullout under cutting load. Do not exceed the tool holder manufacturer's recommended torque when tightening collet nuts. Inspect the cutting edges and corner radius for chipping before each use, as carbide tools are brittle and can fracture if mishandled or dropped.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMill Diameter\u003c\/strong\u003e: 0.2500 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 1\/4 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength of Cut\u003c\/strong\u003e: 1-1\/2 inches (1.5000 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: 0.0450 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\u003eMill Diameter Tolerance\u003c\/strong\u003e: +0.000000 \/ -0.002500 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\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 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\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\u003eCoating\u003c\/strong\u003e: TiCN\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength Type\u003c\/strong\u003e: Extra Long\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: 12183238\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ACCUPRO","offers":[{"title":"Default Title","offer_id":51747851305266,"sku":"12183238","price":84.76,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/d976005fce9bf3ef09006651c7df1dda.jpg?v=1788886257","url":"https:\/\/voomisupply.com\/products\/accupro-12183238-corner-radius-end-mill-1-4-in-4-flute-solid-carbide","provider":"Voomi Supply","version":"1.0","type":"link"}