{"product_id":"value-collection-gh8816241-counterbore-1-3-8-in-5-flute","title":"Value Collection GH8816241 Counterbore 1-3\/8 in 5 Flute","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe Value Collection GH8816241 is a 5-flute interchangeable pilot counterbore designed for precision recess-cutting in metalworking and machining applications. Built from cobalt steel with a bright, uncoated finish, this counterbore delivers the hardness and heat resistance needed for cutting tough alloys and hardened steels. It features a 1-3\/8 inch cutting diameter, a 1 inch straight shank, and a 6-5\/8 inch overall length. The interchangeable pilot design accepts a 3\/8 inch pilot shank, allowing technicians to swap pilots for different fastener clearance requirements without replacing the body. Right-hand cutting direction is standard.\u003c\/p\u003e\n\u003cp\u003eThis counterbore is used in machine shops, maintenance facilities, and aerospace or industrial fabrication environments where countersunk or counterbored holes are required for cap screws, bolts, or socket head fasteners. The cobalt construction makes it suitable for harder workpiece materials where high-speed steel tooling would wear prematurely. It is typically run on a drill press, milling machine, or CNC machining center. The 4-5\/8 inch shank length provides solid grip and reduced runout in standard tool holders.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e1-3\/8 inch counterbore diameter for standard cap screw seating\u003c\/li\u003e\n  \u003cli\u003eCobalt steel construction for improved heat and wear resistance over standard HSS\u003c\/li\u003e\n  \u003cli\u003e5-flute geometry for smooth cutting action and improved surface finish\u003c\/li\u003e\n  \u003cli\u003eInterchangeable pilot accepts 3\/8 inch pilot shank for flexible fastener compatibility\u003c\/li\u003e\n  \u003cli\u003eBright, uncoated finish suitable for use with cutting fluids\u003c\/li\u003e\n  \u003cli\u003eRight-hand cutting direction for standard machine spindle use\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned for use with 3\/8 inch interchangeable pilots. Fits standard straight-shank tool holders with a 1 inch bore. Suitable for drill presses, milling machines, and CNC machining centers configured for straight-shank counterbore tooling.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation and operation should be performed by a qualified machinist. Secure the 1 inch straight shank firmly in a collet or drill chuck rated for the shank diameter before operation. Ensure the pilot is fully seated and locked before cutting to prevent lateral movement and oversized holes. Apply appropriate cutting fluid for the workpiece material to extend tool life and improve finish quality.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCounterbore Diameter\u003c\/strong\u003e: 1-3\/8 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 1 inch\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: 6-5\/8 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: 3\/8 inch\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\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: GH8816241\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"VALUE COLLECTION","offers":[{"title":"Default Title","offer_id":51718271762738,"sku":"GH8816241","price":489.22,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/8373f0fd7dbb88579b3c71d4c2522b3c_dbf27d16-a31e-489f-b84b-7eddccaf4f71.jpg?v=1788551426","url":"https:\/\/voomisupply.com\/products\/value-collection-gh8816241-counterbore-1-3-8-in-5-flute","provider":"Voomi Supply","version":"1.0","type":"link"}