{"product_id":"accupro-12183012-corner-radius-end-mill-1-4-inch-4-flute","title":"Accupro 12183012 Corner Radius End Mill 1\/4 Inch 4 Flute","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe ACCUPRO 12183012 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 0.09 inch corner radius, this tool produces smooth, radiused transitions at the base of milled features while reducing stress concentrations. The 4-flute, right-hand spiral geometry and TiCN coating improve wear resistance and allow higher surface speeds compared to uncoated carbide. The micrograin carbide substrate supports tighter tolerances and longer tool life in production environments. This is a single-end, centercutting design, meaning it can be plunged directly into material. It is suited for use by machinists and toolmakers in CNC milling applications.\u003c\/p\u003e\u003cp\u003eThis end mill is used in vertical and horizontal CNC machining centers for profiling, slotting, and contouring operations where a radiused corner is required. The long flute length of 1.125 inches (1-1\/8 inches length of cut) makes it well-suited for deeper pocketing passes and side-milling applications. The 1\/4 inch shank diameter fits standard ER collets and end mill holders common in light to mid-duty machining setups. Right-hand cutting direction is standard for conventional and climb milling in most CNC programs.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e0.09 inch corner radius reduces corner chipping and stress risers in milled parts\u003c\/li\u003e\n\u003cli\u003eTiCN coating improves hardness and wear resistance over uncoated carbide\u003c\/li\u003e\n\u003cli\u003eMicrograin solid carbide substrate for tight tolerances and extended tool life\u003c\/li\u003e\n\u003cli\u003eCentercutting design allows direct plunge entry into workpiece material\u003c\/li\u003e\n\u003cli\u003e40-degree helix angle promotes smooth chip evacuation during deep cuts\u003c\/li\u003e\n\u003cli\u003eRight-hand flute direction compatible with standard CNC spindle rotation\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as a direct-fit replacement for 1\/4 inch shank corner radius end mills in standard ER collet chucks and end mill holders used in CNC vertical and horizontal machining centers.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation is performed by qualified machinists or CNC setup personnel. Ensure the spindle is fully stopped and locked out before changing tooling. Seat the shank fully into the collet or end mill holder and torque the retention nut per the toolholder manufacturer specification. Verify runout with a dial indicator before beginning production cuts to confirm proper seating.\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\u003eMill Diameter Tolerance\u003c\/strong\u003e: +0.0000 to -0.0025 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCorner Radius\u003c\/strong\u003e: 0.09 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCorner Radius Tolerance\u003c\/strong\u003e: 0.0015 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: 1.125 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 3 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\u003eShank Diameter Tolerance\u003c\/strong\u003e: -0.0001 to -0.0004 inches\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: TiCN\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\u003eLength Type\u003c\/strong\u003e: Long\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVariable Index\u003c\/strong\u003e: No\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExtended Reach\u003c\/strong\u003e: No\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUNSPSC Code\u003c\/strong\u003e: 27112803\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.08 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: 12183012\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ACCUPRO","offers":[{"title":"Default Title","offer_id":51729177968946,"sku":"12183012","price":72.69,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/dfa6a909ce42a63785c4ffb3e09b2a6b.jpg?v=1788701471","url":"https:\/\/voomisupply.com\/products\/accupro-12183012-corner-radius-end-mill-1-4-inch-4-flute","provider":"Voomi Supply","version":"1.0","type":"link"}