{"product_id":"value-collection-gh8816043-counterbore-1-1-16-in-cobalt","title":"Value Collection GH8816043 Counterbore 1-1\/16 in Cobalt","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe VALUE COLLECTION GH8816043 is a 3-flute interchangeable pilot counterbore designed for precision enlarging and finishing of bolt-seat recesses in metal fabrication and machining applications. Built from cobalt steel with a bright, uncoated finish, this tool delivers solid performance in harder workpiece materials where high-speed steel would wear prematurely. The counterbore measures 1-1\/16 inches in diameter with a 3\/4-inch straight shank and an overall length of 6-3\/8 inches. The 4-5\/8-inch shank length provides extended reach for deeper setups. Cutting action is right-hand direction. Machinists and tool-and-die professionals typically specify this style for consistent, repeatable counterbore geometry on production or repair runs.\u003c\/p\u003e\n\u003cp\u003eThis interchangeable pilot counterbore is suited for use in vertical mills, drill presses, and CNC machining centers where a clean, flat-bottomed counterbore seat is required. The interchangeable pilot design accepts a 5\/16-inch pilot shank, allowing the tool to be reused with different pilot sizes for varying fastener clearance requirements. It is most commonly applied in aerospace-adjacent metalworking, general machining, and maintenance repair operations on ferrous and harder non-ferrous materials.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e1-1\/16 inch counterbore diameter for standard bolt-seat recessing\u003c\/li\u003e\n  \u003cli\u003eCobalt steel construction for improved wear resistance in harder materials\u003c\/li\u003e\n  \u003cli\u003e3-flute geometry for chip clearance and surface finish quality\u003c\/li\u003e\n  \u003cli\u003eStraight shank at 3\/4 inch diameter fits standard machine tool holders\u003c\/li\u003e\n  \u003cli\u003eInterchangeable pilot accepts 5\/16 inch pilot shank diameter\u003c\/li\u003e\n  \u003cli\u003eBright, uncoated finish suitable for use with cutting fluids\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as an OEM-style interchangeable pilot counterbore compatible with standard straight-shank tool holders accepting a 3\/4 inch shank, and pilot systems using a 5\/16 inch pilot shank.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation and use should be performed by a qualified machinist or tooling technician. Secure the straight shank firmly in a collet or tool holder rated for the shank diameter before operation, and verify the pilot is properly seated before cutting. Always apply appropriate cutting fluid when machining ferrous or hardened materials to extend tool life and maintain finish quality. Follow all applicable shop safety protocols and machine guarding requirements during setup and operation.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCounterbore Diameter\u003c\/strong\u003e: 1-1\/16 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 3\/4 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: 4-5\/8 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 6-3\/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: 5\/16 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTool Material\u003c\/strong\u003e: Cobalt Steel\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoating \/ Finish\u003c\/strong\u003e: Bright \/ Uncoated\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAircraft Style\u003c\/strong\u003e: No\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: GH8816043\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"VALUE COLLECTION","offers":[{"title":"Default Title","offer_id":51699780845874,"sku":"GH8816043","price":343.37,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/c09de9f78a9d9a42006f8cef74948bba.jpg?v=1788380862","url":"https:\/\/voomisupply.com\/products\/value-collection-gh8816043-counterbore-1-1-16-in-cobalt","provider":"Voomi Supply","version":"1.0","type":"link"}