{"product_id":"value-collection-gh8830440-counterbore-11-16-in-4-flute-hss","title":"Value Collection GH8830440 Counterbore 11\/16 in 4 Flute Hss","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe Value Collection GH8830440 is an interchangeable pilot counterbore designed for precision counterboring operations in metalworking and aircraft-style applications. It features a 11\/16-inch counterbore diameter and a 1\/2-inch straight shank, making it compatible with standard drill press and milling machine setups. The tool is manufactured from high speed steel with a bright, uncoated polished finish. Four right-hand cutting flutes deliver clean, consistent material removal. At 5-3\/8 inches overall length, the GH8830440 provides adequate reach for most production and maintenance counterboring tasks. Installation and use are handled by machinists, maintenance technicians, and aerospace fabricators requiring accurate seat geometry for fastener heads.\u003c\/p\u003e\u003cp\u003eThis counterbore is suited for aircraft-style applications where precise fastener seating is critical. The interchangeable pilot design accepts a 3\/16-inch pilot shank, allowing operators to swap pilots without replacing the entire tool body. It is appropriate for use in job shops, aircraft maintenance facilities, and general metalworking environments where consistent counterbore depth and diameter tolerance are required.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e11\/16-inch counterbore diameter for standard fastener head seating\u003c\/li\u003e\n\u003cli\u003eInterchangeable pilot accepts 3\/16-inch pilot shank diameter\u003c\/li\u003e\n\u003cli\u003e1\/2-inch straight shank fits standard chucks and collets\u003c\/li\u003e\n\u003cli\u003eHigh speed steel construction for durability across a range of metals\u003c\/li\u003e\n\u003cli\u003e4 right-hand cutting flutes for smooth, accurate material removal\u003c\/li\u003e\n\u003cli\u003eBright, uncoated polished finish suitable for general-purpose use\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-style interchangeable pilot counterbore for use with standard 1\/2-inch straight shank toolholders and accepts a 3\/16-inch pilot shank for guided counterboring operations.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eThis tool is installed and operated by machinists and metalworking technicians using standard drill presses, milling machines, or handheld drilling equipment. Secure the 1\/2-inch straight shank firmly in the chuck or collet before operation and verify the correct pilot shank is fully seated before cutting. Always power down and de-energize the machine before changing pilots or removing the tool. Follow applicable shop safety standards and workpiece fixturing procedures to prevent movement during cutting.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCounterbore Diameter\u003c\/strong\u003e: 11\/16 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\u003ePilot Shank Diameter Compatibility\u003c\/strong\u003e: 3\/16 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 5-3\/8 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Flutes\u003c\/strong\u003e: 4\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Type\u003c\/strong\u003e: Straight\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting Direction\u003c\/strong\u003e: Right Hand\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: Yes\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eStandard Information\u003c\/h4\u003e\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: GH8830440\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"VALUE COLLECTION","offers":[{"title":"Default Title","offer_id":51702816833842,"sku":"GH8830440","price":124.58,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/2240e1441d6a2d4c79a52efb2d98e19c_abdfd9bc-3096-4306-b055-537b3446d4c2.jpg?v=1788413464","url":"https:\/\/voomisupply.com\/products\/value-collection-gh8830440-counterbore-11-16-in-4-flute-hss","provider":"Voomi Supply","version":"1.0","type":"link"}