{"product_id":"value-collection-gh8790404-counterbore-5-8-in-hss-3-flute","title":"Value Collection GH8790404 Counterbore 5\/8 in Hss 3 Flute","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe Value Collection GH8790404 is a straight-shank interchangeable pilot counterbore designed for creating accurate counterbored holes in metal workpieces. Machined from high speed steel with a bright, uncoated finish, this tool features a 5\/8 inch cutting diameter and a 1\/2 inch straight shank. Three right-hand flutes provide efficient chip evacuation during cutting. The interchangeable pilot design accepts a 3\/16 inch pilot shank, allowing the counterbore to be used with separately sourced pilots for precise hole location and concentricity control. Overall length is 5-1\/8 inches with a shank length of 3-7\/8 inches.\u003c\/p\u003e\n\u003cp\u003eThis counterbore is suited for use in machine shop, maintenance, and metalworking environments where bolt-head or fastener seating requires a flat-bottomed recess. It is compatible with standard drill presses, knee mills, and machining centers equipped with a 1\/2 inch toolholder or collet chuck. Typical applications include producing counterbores for socket head cap screws and similar fasteners in ferrous and non-ferrous metals. This tool is intended for professional machinists, tool and die makers, and maintenance technicians working in production or job-shop settings.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e5\/8 inch counterbore diameter for standard fastener seating applications\u003c\/li\u003e\n  \u003cli\u003eHigh speed steel construction provides good wear resistance across ferrous and non-ferrous materials\u003c\/li\u003e\n  \u003cli\u003eThree right-hand flutes for efficient chip removal and smooth finish\u003c\/li\u003e\n  \u003cli\u003eInterchangeable pilot accepts 3\/16 inch pilot shank for accurate hole location\u003c\/li\u003e\n  \u003cli\u003eBright uncoated finish suitable for general-purpose machining\u003c\/li\u003e\n  \u003cli\u003eStraight 1\/2 inch shank for compatibility with standard collets and toolholders\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as a standard interchangeable pilot counterbore compatible with 1\/2 inch straight-shank toolholders and collet chucks; accepts a 3\/16 inch diameter pilot shank.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eThis tool is installed and operated by machinists and metalworking technicians using drill presses, mills, or machining centers. Secure the shank firmly in a 1\/2 inch collet or toolholder before operation and verify the pilot is properly seated before beginning the cut. Ensure the workpiece is clamped securely to prevent movement during counterboring. Use appropriate cutting fluid for the workpiece material to extend tool life and improve surface finish.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCounterbore Diameter\u003c\/strong\u003e: 5\/8 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 1\/2 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Type\u003c\/strong\u003e: Straight\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Length\u003c\/strong\u003e: 3-7\/8 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 5-1\/8 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNumber of Flutes\u003c\/strong\u003e: 3\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCutting Direction\u003c\/strong\u003e: Right Hand\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePilot Shank Diameter Compatibility\u003c\/strong\u003e: 3\/16 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTool Material\u003c\/strong\u003e: High Speed Steel\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoating\/Finish\u003c\/strong\u003e: Bright, Uncoated, Polished\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAircraft Style\u003c\/strong\u003e: No\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.31 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: Value Collection\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: GH8790404\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"VALUE COLLECTION","offers":[{"title":"Default Title","offer_id":51692613468466,"sku":"GH8790404","price":90.01,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/bc6399681eef686d3c71f6863c96cd39.jpg?v=1788299997","url":"https:\/\/voomisupply.com\/products\/value-collection-gh8790404-counterbore-5-8-in-hss-3-flute","provider":"Voomi Supply","version":"1.0","type":"link"}