{"product_id":"value-collection-gh8816563-counterbore-1-7-8in-5-flute-cobalt","title":"Value Collection GH8816563 Counterbore 1-7\/8in 5 Flute Cobalt","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe VALUE COLLECTION GH8816563 is a 5-flute interchangeable pilot counterbore designed for precision counterboring operations in metal fabrication and machining applications. Built from cobalt steel with a bright, uncoated finish, this tool delivers the heat and wear resistance needed for drilling into hard or abrasive materials. The straight shank measures 1.5 inches in diameter and 5.875 inches in length, with a cutting head diameter of 1.875 inches. Overall length is 8.125 inches. Right-hand cutting direction is standard. The interchangeable pilot design accepts a 0.4375-inch pilot shank, allowing quick changeovers without replacing the full body.\u003c\/p\u003e\u003cp\u003eThis counterbore is suited for machine shops, maintenance facilities, and production environments where consistent seat geometry is required for fastener heads or bearing surfaces. It is appropriate for use in ferrous and hard-alloy materials where cobalt tooling is specified over standard high-speed steel. Installation is performed in a drill press, milling machine, or CNC machining center. The interchangeable pilot configuration is particularly useful in high-mix operations where multiple pilot sizes are cycled through a single counterbore body.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eCobalt steel construction for improved heat resistance and tool life in hard materials\u003c\/li\u003e\n\u003cli\u003e5-flute geometry for smoother cutting and reduced chatter in deep counterbore applications\u003c\/li\u003e\n\u003cli\u003eBright, uncoated finish suitable for general-purpose ferrous machining\u003c\/li\u003e\n\u003cli\u003eInterchangeable pilot accepts a 0.4375-inch pilot shank for flexible setup\u003c\/li\u003e\n\u003cli\u003eStraight shank for direct clamping in standard drill chucks or collet holders\u003c\/li\u003e\n\u003cli\u003eRight-hand cutting direction compatible with standard machine spindle rotation\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as a standard interchangeable pilot counterbore for use with compatible 0.4375-inch straight-shank pilots in drill presses, milling machines, and CNC machining centers requiring a 1.875-inch counterbore diameter.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation and use of this counterbore should be performed by a qualified machinist. Secure the straight shank firmly in a properly sized collet or drill chuck before operation, and verify the pilot is fully seated and locked before engaging the workpiece. Power down and de-energize the machine before changing pilots or inspecting the cutting edges. Follow applicable machine tool safety practices and the equipment manufacturer guidelines for spindle speeds and feed rates.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCounterbore Diameter\u003c\/strong\u003e: 1.875 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 1.5 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Length\u003c\/strong\u003e: 5.875 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 8.125 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Flutes\u003c\/strong\u003e: 5\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePilot Shank Diameter Compatibility\u003c\/strong\u003e: 0.4375 inches\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: Cobalt 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\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: GH8816563\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"VALUE COLLECTION","offers":[{"title":"Default Title","offer_id":51704980275506,"sku":"GH8816563","price":522.55,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/8373f0fd7dbb88579b3c71d4c2522b3c_dc7edb5d-3dfe-4b85-874d-d5c1de3950e9.jpg?v=1788426128","url":"https:\/\/voomisupply.com\/products\/value-collection-gh8816563-counterbore-1-7-8in-5-flute-cobalt","provider":"Voomi Supply","version":"1.0","type":"link"}