{"product_id":"helical-solutions-86769-corner-radius-end-mill-3-8-in-5-flute","title":"Helical Solutions 86769 Corner Radius End Mill 3\/8 in 5 Flute","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe HELICAL SOLUTIONS 86769 is a 5-flute, solid carbide corner radius end mill engineered for demanding material removal in stainless steel, high-temperature alloys, and hardened steel. It carries a 3\/8 inch mill diameter with a 0.50 mm (0.0200 inch) corner radius and a 1\/2 inch length of cut. The Tplus PVD coating reduces heat buildup and extends tool life in abrasive and work-hardening materials. At 4 inches overall length with a 1-5\/8 inch reach, this single-end, centercutting tool handles both roughing and finishing passes in one setup. The variable pitch geometry helps break up harmonics and reduce chatter at higher feed rates.\u003c\/p\u003e\u003cp\u003eThe 86769 is suited for aerospace, medical, and general precision machining shops running stainless steels, nickel-based superalloys, and hardened steels in the 45-65 HRC range. Its extended reach of 1-5\/8 inches makes it practical for deep-pocket work and shoulder milling where standard-length tools fall short. Right-hand cutting and right-hand flute direction are standard. The straight-cylindrical shank is sized for high-precision toolholders to maintain the 0.0005 inch maximum TIR specification.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e5-flute variable-pitch design reduces chatter and improves surface finish in tough alloys\u003c\/li\u003e\n\u003cli\u003eTplus PVD coating provides thermal resistance and extended tool life in stainless and high-temp materials\u003c\/li\u003e\n\u003cli\u003e0.50 mm corner radius protects cutting edge and reduces stress concentration at the corner\u003c\/li\u003e\n\u003cli\u003eCentercutting geometry allows plunge entry and ramp milling\u003c\/li\u003e\n\u003cli\u003eExtended reach of 1-5\/8 inches supports deep-pocket and shoulder milling applications\u003c\/li\u003e\n\u003cli\u003eSolid carbide substrate delivers rigidity and wear resistance in hardened and abrasive workpiece materials\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned for use with high-precision toolholders. Intended for machining stainless steel, high-temperature alloys, and hardened steel. Part of the HELICAL SOLUTIONS HEV-RN-5 series.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation should be performed by a qualified machinist following shop-standard toolholder torque procedures. Seat the straight-cylindrical shank fully in a high-precision collet or hydraulic toolholder to maintain TIR within specification. Confirm runout with a dial indicator before cutting. Use appropriate speeds, feeds, and coolant strategies recommended for the specific workpiece material and machine spindle.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMill Diameter\u003c\/strong\u003e: 3\/8 inch (0.3750 inch)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Flutes\u003c\/strong\u003e: 5\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength of Cut\u003c\/strong\u003e: 1\/2 inch (0.5000 inch)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCorner Radius\u003c\/strong\u003e: 0.50 mm (0.0200 inch)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 4 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReach Length\u003c\/strong\u003e: 1-5\/8 inch (1.6250 inch)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 3\/8 inch (0.3750 inch)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNeck Diameter\u003c\/strong\u003e: 0.3560 inch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnd Type\u003c\/strong\u003e: Corner Radius\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial\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\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\u003ePitch\u003c\/strong\u003e: Variable\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCentercutting\u003c\/strong\u003e: Yes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExtended Reach\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\u003eMaximum TIR\u003c\/strong\u003e: 0.0005 inch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCorner Radius Tolerance\u003c\/strong\u003e: -0.0020 to 0.0020 inch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMill Diameter Tolerance\u003c\/strong\u003e: -0.0020 \/ 0.0000 inch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Diameter Tolerance\u003c\/strong\u003e: h6\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length Tolerance\u003c\/strong\u003e: -0.0620 \/ 0.0620 inch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrimary Workpiece Materials\u003c\/strong\u003e: Stainless Steel, High-Temperature Alloy, Hardened Steel\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\u003eSeries\u003c\/strong\u003e: HEV-RN-5\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.2 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: 86769\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"HELICAL SOLUTIONS","offers":[{"title":"Default Title","offer_id":51749660590386,"sku":"86769","price":157.44,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/8a5e1d0d70190f353e04a1ab2a05a3b1.jpg?v=1788908914","url":"https:\/\/voomisupply.com\/products\/helical-solutions-86769-corner-radius-end-mill-3-8-in-5-flute","provider":"Voomi Supply","version":"1.0","type":"link"}