{"product_id":"yg-1-gm639903-corner-radius-end-mill-3-16-in-4-flute-carbide","title":"YG-1 GM639903 Corner Radius End Mill 3\/16 in 4 Flute Carbide","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe YG-1 GM639903 is a single-end corner radius end mill ground from solid micrograin carbide for use in ferrous machining applications. It carries a 3\/16-inch (0.1875-inch) cutting diameter, a 0.0200-inch corner radius, and a 4-flute spiral configuration with a 30-degree medium helix. The stub-length geometry keeps the 3\/8-inch length of cut and 3\/8-inch reach compact, maximizing rigidity when taking finishing or light roughing passes. A PVD coating provides surface hardness and thermal resistance suited to steel and stainless steel workpieces. The straight cylindrical shank measures 1\/4 inch in diameter and seats directly into standard toolholders.\u003c\/p\u003e\n\u003cp\u003eThis end mill is designed for machining steel as the primary workpiece material, with secondary capability on stainless steel and cast iron. The corner radius profile reduces stress concentration at the cutting edge and is well suited to profiling, slotting, and peripheral milling in applications where a sharp square corner is not required. The right-hand cut and right-hand flute direction are standard for conventional CNC machining centers and manual mills. Coolant-through is not supported on this tool, so external coolant or air blast is the appropriate delivery method during cutting operations.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eSolid micrograin carbide construction for improved edge retention and wear resistance in ferrous materials\u003c\/li\u003e\n  \u003cli\u003e0.0200-inch corner radius with a tolerance of plus 0.0010 to minus 0.0010 inch for consistent edge geometry\u003c\/li\u003e\n  \u003cli\u003ePVD coating classification supports elevated cutting temperatures encountered in steel and stainless steel operations\u003c\/li\u003e\n  \u003cli\u003e4-flute, 30-degree medium helix balances chip evacuation with surface finish quality\u003c\/li\u003e\n  \u003cli\u003eStub-length (3\/8-inch LOC) design maximizes tool stiffness and minimizes deflection in short-reach applications\u003c\/li\u003e\n  \u003cli\u003eRight-hand cut and right-hand spiral flute direction compatible with standard CNC and manual milling setups\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned for use with standard cylindrical toolholders accepting a 1\/4-inch straight shank. Suited for steel, stainless steel, and cast iron workpiece materials per YG-1 Series GM application ratings.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eThis tool is installed and changed by machinists or toolroom technicians following standard mill setup procedures. The machine spindle must be fully stopped and the tool path verified before inserting or removing the cutter from the toolholder. Confirm shank seating depth and runout with a dial indicator before production cuts. Follow shop-specific speeds and feeds for the workpiece material, as improper parameters are the leading cause of premature carbide end mill failure.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMill Diameter\u003c\/strong\u003e: 3\/16 inches (0.1875 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMill Diameter Tolerance\u003c\/strong\u003e: +0.0000 \/ -0.0012 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: 3\/8 inches (0.3750 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCorner Radius\u003c\/strong\u003e: 0.0200 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCorner Radius Tolerance\u003c\/strong\u003e: +0.0010 to -0.0010 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 2-1\/2 inches (2.5 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 1\/4 inches (0.2500 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Diameter Tolerance\u003c\/strong\u003e: +0.0000 \/ -0.0003 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHelix Angle\u003c\/strong\u003e: 30 degrees\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHelix Style\u003c\/strong\u003e: Medium\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\u003eLength Type\u003c\/strong\u003e: Stub\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\u003eShank Type\u003c\/strong\u003e: Straight-Cylindrical\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 Classification\u003c\/strong\u003e: PVD\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePrimary Workpiece Material\u003c\/strong\u003e: Steel\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSecondary Workpiece Materials\u003c\/strong\u003e: Stainless Steel, Cast Iron\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\u003eCentercutting\u003c\/strong\u003e: No\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\u003eExtended Reach\u003c\/strong\u003e: No\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: GM\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.3 pounds\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eStandard Information\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: YG-1\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: GM639903\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"YG-1","offers":[{"title":"Default Title","offer_id":67918230389042,"sku":"GM639903","price":70.84,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/c5721ec896ba75e5df995892a45b8565.jpg?v=1791268512","url":"https:\/\/voomisupply.com\/products\/yg-1-gm639903-corner-radius-end-mill-3-16-in-4-flute-carbide","provider":"Voomi Supply","version":"1.0","type":"link"}