{"product_id":"helical-solutions-84021-corner-radius-end-mill-1-16in-4-flute","title":"Helical Solutions 84021 Corner Radius End Mill 1\/16in 4 Flute","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe HELICAL SOLUTIONS 84021 is a 4-flute, solid carbide corner radius end mill engineered for high-efficiency machining in demanding materials. It features a 1\/16 inch mill diameter, a 0.0100 inch corner radius, and a 5\/16 inch length of cut (0.3120 inches decimal). The Tplus PVD coating extends tool life and improves wear resistance when cutting stainless steel, high-temperature alloys, and hardened steel. A variable index geometry reduces harmonic vibration, making it well-suited for aggressive material removal and finish passes in a single tool path. This end mill is a single-end, centercutting design with right-hand flute direction and right-hand cutting direction.\u003c\/p\u003e\u003cp\u003eThe 84021 is designed for use in CNC milling operations where tight tolerances and surface finish are critical. Its extra-long overall length of 2.5 inches and 1\/4 inch straight-cylindrical shank make it compatible with high-precision toolholders. Primary applications include roughing and finishing passes in stainless steel, superalloys, titanium, and hard materials. Secondary workpiece materials include steel and cast iron. It fits into HSM (high-speed machining) workflows where rigidity, runout control, and coating performance are priorities. This tool is intended for use by experienced machinists and CNC programmers working in precision manufacturing environments.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eSolid carbide construction for rigidity and dimensional stability in hard-material cutting\u003c\/li\u003e\n\u003cli\u003eTplus PVD coating rated for stainless steel, high-temperature alloys, and hardened steel\u003c\/li\u003e\n\u003cli\u003eVariable index pitch reduces chatter and harmonic vibration during cutting\u003c\/li\u003e\n\u003cli\u003eCentercutting design allows plunge entry without a pre-drilled hole\u003c\/li\u003e\n\u003cli\u003eCorner radius of 0.0100 inch reduces stress concentration at the cutting edge\u003c\/li\u003e\n\u003cli\u003eMaximum TIR of 0.0005 inch ensures consistent runout in high-precision toolholders\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned for use with high-precision toolholders as part of the HSM-4 series. Primary workpiece materials are stainless steel, superalloys, and titanium (material codes M, S, H). Secondary workpiece materials include steel and cast iron (material codes P, K).\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation should be performed by a qualified machinist or CNC programmer familiar with end mill tooling. Seat the 1\/4 inch shank fully in a high-precision toolholder and torque the collet or set screw to the toolholder manufacturer specification. Verify runout with a dial indicator before cutting, keeping TIR within the 0.0005 inch maximum. Always ensure the machine spindle is fully stopped before changing or inspecting tooling.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMill Diameter\u003c\/strong\u003e: 1\/16 inch (0.0625 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: 5\/16 inch (0.3120 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCorner Radius\u003c\/strong\u003e: 0.0100 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCorner Radius Tolerance\u003c\/strong\u003e: -0.0020 to 0.0020 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 2.5 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 1\/4 inch (0.2500 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Type\u003c\/strong\u003e: Straight-Cylindrical\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\u003eEnd Mill Material\u003c\/strong\u003e: Solid Carbide\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating\u003c\/strong\u003e: Tplus (PVD)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVariable Index\u003c\/strong\u003e: Yes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCentercutting\u003c\/strong\u003e: Yes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoolant Through\u003c\/strong\u003e: No\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChipbreaker\u003c\/strong\u003e: No\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength Type\u003c\/strong\u003e: Extra Long\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial Removal Type\u003c\/strong\u003e: Roughing and Finishing\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrimary Workpiece Material\u003c\/strong\u003e: Stainless Steel, Superalloys, Titanium, Hard Material\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSecondary Workpiece Material\u003c\/strong\u003e: Steel, Cast Iron\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum TIR\u003c\/strong\u003e: 0.0005 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMill Diameter Tolerance\u003c\/strong\u003e: -0.0020\/0.0000 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Diameter Tolerance\u003c\/strong\u003e: h6\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: HSM-4\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.05 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: HELICAL SOLUTIONS\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 84021\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"HELICAL SOLUTIONS","offers":[{"title":"Default Title","offer_id":51749452546354,"sku":"84021","price":76.57,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/9a395e08c948bbcb68aadfbea4ad470c_01c479d2-7eb1-4e88-be48-80f132352f9b.jpg?v=1788906281","url":"https:\/\/voomisupply.com\/products\/helical-solutions-84021-corner-radius-end-mill-1-16in-4-flute","provider":"Voomi Supply","version":"1.0","type":"link"}