{"product_id":"value-collection-gh8830606-counterbore-15-16in-4-flute-hss","title":"Value Collection GH8830606 Counterbore 15\/16in 4 Flute Hss","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe VALUE COLLECTION GH8830606 is a 4-flute interchangeable pilot counterbore designed for precision counterboring operations in metal fabrication and aircraft-style applications. Built from high-speed steel with a bright, uncoated polished finish, this tool features a 15\/16-inch counterbore diameter and a 1\/2-inch straight shank for secure chuck engagement. The right-hand cutting direction and 5-3\/8-inch overall length make it well-suited for production environments where consistent seating depths and clean bore finishes are required. Machinists and toolroom technicians install this type of counterbore on lathes, drill presses, and milling machines.\u003c\/p\u003e\u003cp\u003eThis interchangeable pilot counterbore is intended for use in aircraft-style machining operations where precise fastener seat geometry is critical. The interchangeable pilot system allows the same body to accept different pilot diameters, increasing tooling versatility across varying hole sizes. The 3\/16-inch pilot shank diameter compatibility makes it appropriate for light to medium counterboring tasks in aluminum, mild steel, and similar machinable alloys commonly encountered in aerospace and general metalworking environments.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e15\/16-inch counterbore diameter for accurate fastener seat sizing\u003c\/li\u003e\n\u003cli\u003e4-flute geometry promotes smooth cutting action and clean bore finish\u003c\/li\u003e\n\u003cli\u003eHigh-speed steel construction provides wear resistance across a range of machinable metals\u003c\/li\u003e\n\u003cli\u003eBright, uncoated polished finish suitable for general-purpose and aircraft-style applications\u003c\/li\u003e\n\u003cli\u003eInterchangeable pilot design allows pilot diameter changes without replacing the counterbore body\u003c\/li\u003e\n\u003cli\u003e1\/2-inch straight shank compatible with standard drill chucks and collet holders\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned for use with interchangeable pilot systems accepting a 3\/16-inch pilot shank diameter. Fits standard 1\/2-inch straight-shank tool holders on drill presses, lathes, and milling machines used in aircraft-style and general metalworking applications.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation and operation should be performed by qualified machinists or toolroom technicians familiar with rotating cutting tools. Secure the 1\/2-inch straight shank firmly in a properly sized chuck or collet before operation, and verify that the pilot is fully seated and locked before engaging the workpiece. Always power down and lock out the machine before changing pilots or inspecting the tool. Follow applicable shop safety standards and machine manufacturer guidelines for speed and feed selection.\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: 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\u003ePilot Shank Diameter Compatibility\u003c\/strong\u003e: 3\/16 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Flutes\u003c\/strong\u003e: 4\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\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: GH8830606\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"VALUE COLLECTION","offers":[{"title":"Default Title","offer_id":51695826796850,"sku":"GH8830606","price":123.83,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/2fc30736110af2b30957e085098e8db6.jpg?v=1788338561","url":"https:\/\/voomisupply.com\/products\/value-collection-gh8830606-counterbore-15-16in-4-flute-hss","provider":"Voomi Supply","version":"1.0","type":"link"}