{"product_id":"value-collection-gh8831125-counterbore-1-3-16-in-4-flute-hss","title":"Value Collection GH8831125 Counterbore 1-3\/16 in 4 Flute Hss","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe VALUE COLLECTION GH8831125 is an interchangeable pilot counterbore designed for precision counter-boring operations in metal fabrication and aerospace-style machining. Built from high speed steel (HSS) with a bright, uncoated polished finish, this tool features a 1-3\/16 inch counterbore diameter and a 1\/2 inch straight shank for secure chuck engagement. Four right-hand cutting flutes provide clean, efficient material removal. With a 5-1\/2 inch overall length, this tool suits deeper reach applications where standard counterbores fall short. Machinists and toolroom technicians working on aircraft-style assemblies or structural components will find this a reliable production-grade option.\u003c\/p\u003e\u003cp\u003eThis counterbore is suited for use in drill press, milling machine, or CNC machining center setups where a flat-bottomed recess is required around a bolt or fastener hole. The aircraft style designation indicates compatibility with close-tolerance hole preparation common in aerospace, defense, and heavy industrial fabrication. The interchangeable pilot design allows the pilot to be swapped to match different pilot shank diameter requirements, with a 3\/16 inch pilot shank compatibility rating noted for this configuration. It is intended for use on ferrous and non-ferrous metals by qualified machinists and tool and die professionals.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e1-3\/16 inch counterbore diameter for precise flat-seat recesses\u003c\/li\u003e\n\u003cli\u003e1\/2 inch straight shank fits standard drill chucks and collets\u003c\/li\u003e\n\u003cli\u003e4 right-hand cutting flutes for smooth, efficient stock removal\u003c\/li\u003e\n\u003cli\u003eHigh speed steel construction provides durability in production machining\u003c\/li\u003e\n\u003cli\u003eBright uncoated polished finish reduces friction and aids chip evacuation\u003c\/li\u003e\n\u003cli\u003eInterchangeable pilot design with 3\/16 inch pilot shank compatibility\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an interchangeable pilot counterbore for use with standard 1\/2 inch straight shank toolholders and compatible pilot sets in drill press, milling, or CNC machining applications requiring an aircraft-style counterbore configuration.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation and operation should be performed by a qualified machinist. Secure the shank fully in the chuck or collet before operation and verify that the pilot fits the pilot hole without excessive play. Ensure the workpiece is firmly fixtured before beginning the cut. Always power down and lock out the machine before changing pilots or inspecting the cutting edges.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCounterbore Diameter\u003c\/strong\u003e: 1-3\/16 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 1\/2 inch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Type\u003c\/strong\u003e: Straight\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 5-1\/2 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Flutes\u003c\/strong\u003e: 4\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting Direction\u003c\/strong\u003e: Right Hand\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePilot Shank Diameter Compatibility\u003c\/strong\u003e: 3\/16 inch\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: GH8831125\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"VALUE COLLECTION","offers":[{"title":"Default Title","offer_id":51705310970162,"sku":"GH8831125","price":204.32,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/18eaa353b71b2f6b1b99c40e0914c8b2.jpg?v=1788428139","url":"https:\/\/voomisupply.com\/products\/value-collection-gh8831125-counterbore-1-3-16-in-4-flute-hss","provider":"Voomi Supply","version":"1.0","type":"link"}