{"product_id":"robbjack-nr-303-16-square-end-mill-0-5in-3-flute-carbide","title":"Robbjack NR-303-16 Square End Mill 0.5in 3-flute Carbide","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe ROBBJACK NR-303-16 is a solid carbide square end mill designed for precision milling operations in metal, composites, and engineering plastics. With a 0.5 inch cutting diameter, 1 inch length of cut, and 3-inch overall length, this single-end tool fits a 0.5 inch straight-cylindrical shank. The three-flute geometry runs a 30-degree right-hand helix with right-hand cut direction, providing efficient chip evacuation in a range of general-purpose milling applications. It is centercutting, enabling direct plunge entry without a pre-drilled hole. The uncoated solid carbide construction uses C2 material grade, making it well-suited for machinists and toolroom operators running CNC machining centers or manual knee mills.\u003c\/p\u003e\n\u003cp\u003eThis end mill fits standard 0.5 inch tool holders and collet chucks used in vertical and horizontal milling setups. The regular-length body works in slotting, profiling, and peripheral milling operations where a short-to-medium reach is sufficient. The spiral flute design and 30-degree helix angle support smooth cutting action in ferrous and non-ferrous materials. It is part of the ROBBJACK NR-303 series, which targets general-purpose solid carbide end mill applications across production and maintenance machining environments. Typical users include CNC machinists, tool-and-die makers, and job shop operators.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eSolid carbide construction, C2 material grade, for rigidity and wear resistance\u003c\/li\u003e\n  \u003cli\u003eThree-flute spiral design with 30-degree right-hand helix for efficient chip removal\u003c\/li\u003e\n  \u003cli\u003eCentercutting geometry allows direct plunge milling without a pilot hole\u003c\/li\u003e\n  \u003cli\u003eStraight-cylindrical 0.5 inch shank fits standard ER and end mill collet holders\u003c\/li\u003e\n  \u003cli\u003eUncoated finish suitable for general-purpose milling in a broad range of materials\u003c\/li\u003e\n  \u003cli\u003eMill diameter tolerance of plus 0.001 to minus 0.000 inches for close-tolerance work\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as a general-purpose replacement or standard tooling selection for 0.5 inch square end mill applications in CNC and manual milling machines accepting straight-cylindrical shank tooling.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation should be performed by a qualified machinist following the machine tool manufacturer guidelines for tool holding and runout. Power down the spindle and lock the machine before inserting or removing the tool from the collet or end mill holder. Verify holder bore cleanliness and proper torque on the drawbar or collet nut before operation. Never exceed the recommended speeds and feeds for the material grade and tool diameter.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMill Diameter\u003c\/strong\u003e: 0.5000 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNumber of Flutes\u003c\/strong\u003e: 3\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: C2\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLength of Cut\u003c\/strong\u003e: 1.0000 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 0.5000 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 3.0000 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHelix Angle\u003c\/strong\u003e: 30 degrees\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlute Type\u003c\/strong\u003e: Spiral\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCutting Direction\u003c\/strong\u003e: Right Hand\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlute 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\u003eCentercutting\u003c\/strong\u003e: Yes\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLength Type\u003c\/strong\u003e: Regular\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMill Diameter Tolerance\u003c\/strong\u003e: plus 0.001 \/ minus 0.000 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Diameter Tolerance\u003c\/strong\u003e: minus 0.0001 \/ minus 0.0002 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Length Tolerance\u003c\/strong\u003e: plus 0.060 \/ minus 0.060 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: NR-303\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.1875 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: ROBBJACK\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: NR-303-16\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ROBBJACK","offers":[{"title":"Default Title","offer_id":52007432749362,"sku":"NR-303-16","price":297.91,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/08e2fbbb57246c08840c1c1534144bb6_6e784a3b-f606-4208-8b85-d08f6596ee4a.jpg?v=1790001671","url":"https:\/\/voomisupply.com\/products\/robbjack-nr-303-16-square-end-mill-0-5in-3-flute-carbide","provider":"Voomi Supply","version":"1.0","type":"link"}