{"product_id":"promax-us556221-corner-radius-end-mill-1-in-5-flute","title":"Promax US556221 Corner Radius End Mill 1 in 5 Flute","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe PROMAX US556221 is a solid carbide corner radius end mill engineered for high-performance material removal in demanding machining applications. With a 1-inch mill diameter, 5 flutes, and a corner radius of 0.060 inches, this tool delivers a balance of rigidity and surface finish quality across both roughing and finishing operations. The proprietary PowerLayer coating extends tool life by reducing heat buildup and friction at the cutting edge. A micrograin carbide substrate supports edge sharpness retention when cutting hard and abrasive workpiece materials. This tool is installed and operated by machinists, CNC operators, and toolroom technicians working with toolholders in production and job-shop environments.\u003c\/p\u003e\u003cp\u003eThe US556221 is suited for milling steel, stainless steel, cast iron, superalloys, and titanium. Its high helix spiral flute geometry promotes efficient chip evacuation in these tough-to-machine materials. The right-hand cutting direction and right-hand flute geometry are standard for conventional CNC machining centers. At a 1.625-inch length of cut and 3-inch overall length, this stub-length configuration provides rigidity for aggressive feed rates while maintaining tool life in interrupted cuts and full-slot applications across a range of workpiece geometries.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eSolid micrograin carbide construction for edge retention in hard and abrasive materials\u003c\/li\u003e\n\u003cli\u003ePowerLayer coating reduces friction and thermal wear at the cutting zone\u003c\/li\u003e\n\u003cli\u003e5-flute design supports higher feed rates and improved surface finish compared to 4-flute tools\u003c\/li\u003e\n\u003cli\u003e0.060-inch corner radius reduces corner chipping and extends tool life at workpiece edges\u003c\/li\u003e\n\u003cli\u003eCenter cutting capable, allowing plunge and ramp entry operations\u003c\/li\u003e\n\u003cli\u003eStraight-cylindrical shank with 0.750-inch diameter fits standard toolholder collets\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned for use with standard toolholders accepting a 0.750-inch straight-cylindrical shank. Suitable for CNC machining centers and manual mills configured for right-hand cutting tools. Intended for workpiece materials including steel, stainless steel, cast iron, superalloys, and titanium per PROMAX US556 series material application designations P, M, K, and S.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eA licensed machinist or CNC operator should install this end mill into a compatible toolholder, ensuring the shank is fully seated and the retention torque meets the toolholder manufacturer's specification. Verify spindle speed, feed rate, and depth of cut against published cutting data for the workpiece material before running. Inspect the collet bore for wear or contamination before securing the tool. Never exceed the tool's rated length of cut or engage the full flute length in a single pass.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMill Diameter\u003c\/strong\u003e: 1 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: 1.625 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: 0.750 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCorner Radius\u003c\/strong\u003e: 0.060 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\u003eMill Diameter Tolerance\u003c\/strong\u003e: -0.0020 to 0.0000 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Diameter Tolerance\u003c\/strong\u003e: -0.0001 to -0.0040 inches\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: PowerLayer\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\u003eHelix Style\u003c\/strong\u003e: High\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlute Type\u003c\/strong\u003e: Spiral\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnd Type\u003c\/strong\u003e: Corner Radius\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Type\u003c\/strong\u003e: Straight-Cylindrical\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength Type\u003c\/strong\u003e: Stub\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\u003eChipbreaker\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\u003eVariable Index\u003c\/strong\u003e: No\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVariable Helix\u003c\/strong\u003e: No\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: Steel, Stainless Steel, Cast Iron, Superalloys and Titanium\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: US556\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.69 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUNSPSC Code\u003c\/strong\u003e: 27112803\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eStandard Information\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: PROMAX\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: US556221\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"PROMAX","offers":[{"title":"Default Title","offer_id":52017620386098,"sku":"US556221","price":251.11,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/6a63d40c76f88b5a79810f85df58ae3e_9beee705-c103-4a3e-9cd4-2b9a248a1f6e.jpg?v=1790009564","url":"https:\/\/voomisupply.com\/products\/promax-us556221-corner-radius-end-mill-1-in-5-flute","provider":"Voomi Supply","version":"1.0","type":"link"}