{"product_id":"value-collection-gh8790602-pilot-counterbore-15-16-in","title":"Value Collection GH8790602 Pilot Counterbore 15\/16 in","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe VALUE COLLECTION GH8790602 is a straight-shank interchangeable pilot counterbore designed for precision counterboring operations in metal fabrication and machining applications. Built from high-speed steel with a bright, uncoated finish, this tool delivers consistent cutting performance in production and maintenance shop environments. It features a 15\/16-inch counterbore diameter, a 3\/4-inch straight shank, and three flutes ground for right-hand cutting direction. The 6-1\/8-inch overall length and 4-5\/8-inch shank length provide reach and rigidity for standard machining setups. The interchangeable pilot design accepts a 1\/4-inch pilot shank, allowing the cutter head to be swapped without replacing the full tool body. Machinists and tool-and-die technicians are the primary users of this counterbore.\u003c\/p\u003e\u003cp\u003eThis counterbore is suited for creating flat-bottomed recesses around drilled holes to seat fastener heads flush or below a workpiece surface. It is commonly used in general metalworking, fixture building, and mechanical assembly operations where bolt or socket-head cap screw clearance is required. The interchangeable pilot system makes it practical for shops that need to maintain consistent shank inventory while running multiple counterbore diameters. Right-hand cutting direction is compatible with standard spindle rotation on most vertical mills, drill presses, and machining centers.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e15\/16-inch counterbore diameter for seating standard fastener heads\u003c\/li\u003e\n\u003cli\u003e3\/4-inch straight shank compatible with standard collets and drill chucks\u003c\/li\u003e\n\u003cli\u003eThree-flute geometry provides smooth cutting action and chip clearance\u003c\/li\u003e\n\u003cli\u003eHigh-speed steel construction handles a broad range of ferrous and non-ferrous materials\u003c\/li\u003e\n\u003cli\u003eInterchangeable 1\/4-inch pilot shank for flexible, multi-diameter setups\u003c\/li\u003e\n\u003cli\u003eBright, uncoated finish suitable for use with cutting fluids\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 3\/4-inch straight-shank toolholders on vertical mills, drill presses, and machining centers accepting a 1\/4-inch pilot shank diameter.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation is performed by qualified machinists or toolroom technicians. Secure the 3\/4-inch shank firmly in a collet, chuck, or toolholder before operation and verify the pilot shank is fully seated and locked. Disengage machine power and allow the spindle to come to a complete stop before changing pilots or inspecting the cutting edges. Apply an appropriate cutting fluid for the workpiece material to extend tool life and improve surface finish.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCounterbore Diameter\u003c\/strong\u003e: 15\/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: 6-1\/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\u003ePilot Shank Diameter Compatibility\u003c\/strong\u003e: 1\/4 inches\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: No\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.68 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUNSPSC Code\u003c\/strong\u003e: 23242100\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: GH8790602\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"VALUE COLLECTION","offers":[{"title":"Default Title","offer_id":51709408182578,"sku":"GH8790602","price":122.78,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/d02ca64e1c1e55ad3cb9059a9ab0a3da.jpg?v=1788455990","url":"https:\/\/voomisupply.com\/products\/value-collection-gh8790602-pilot-counterbore-15-16-in","provider":"Voomi Supply","version":"1.0","type":"link"}