{"product_id":"value-collection-gh8790487-counterbore-3-4-in-hss-3-flute","title":"Value Collection GH8790487 Counterbore 3\/4 in Hss 3 Flute","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe VALUE COLLECTION GH8790487 is an interchangeable pilot counterbore designed for precision recess machining in metal fabrication and maintenance applications. Built from high speed steel with a bright, uncoated polished finish, this counterbore features a 3\/4 inch cutting diameter, a 1\/2 inch straight shank, and three flutes for efficient chip evacuation. The overall length is 5-3\/8 inches, with a shank length of 3-7\/8 inches, making it compatible with standard drill press and milling machine setups. Right-hand cutting geometry suits conventional drilling operations. Machinists, tool and die technicians, and maintenance mechanics are the primary installers of this type of tooling.\u003c\/p\u003e\u003cp\u003eThis counterbore is suited for creating flat-bottomed recesses in ferrous and non-ferrous materials to seat socket head cap screws, bolts, and similar fasteners flush or below a workpiece surface. It is commonly used in job shops, manufacturing facilities, and MRO environments where consistent, repeatable counterbore depth and diameter are required. The interchangeable pilot design accepts a 1\/4 inch pilot shank, allowing the pilot to be swapped to match different bolt or screw clearance holes without replacing the body.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e3\/4 inch counterbore diameter for standard fastener recess applications\u003c\/li\u003e\n\u003cli\u003eHigh speed steel construction for durability across ferrous and non-ferrous workpieces\u003c\/li\u003e\n\u003cli\u003e3-flute design promotes efficient chip removal and smooth surface finish\u003c\/li\u003e\n\u003cli\u003eBright, uncoated polished finish suitable for general-purpose machining\u003c\/li\u003e\n\u003cli\u003eInterchangeable pilot accepts a 1\/4 inch pilot shank\u003c\/li\u003e\n\u003cli\u003eRight-hand cutting direction for use with standard drill press and milling machine rotation\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-style replacement and general-purpose interchangeable pilot counterbore for use with straight-shank tool holders and drill press chucks accepting a 1\/2 inch shank diameter.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eThis tooling is installed and used by machinists and maintenance mechanics operating drill presses, milling machines, or similar machine tools. Secure the workpiece firmly before operation and ensure the pilot shank is fully seated and locked before cutting. Select a spindle speed appropriate for the workpiece material and cutting diameter per standard machining reference charts. Inspect the pilot and cutting edges for wear before each use and replace if chipping or dulling is observed.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCounterbore Diameter\u003c\/strong\u003e: 3\/4 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\u003eShank Length\u003c\/strong\u003e: 3-7\/8 inches\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\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: 0.37 pounds\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: GH8790487\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"VALUE COLLECTION","offers":[{"title":"Default Title","offer_id":51690779509042,"sku":"GH8790487","price":89.23,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/966c83493a4240ca498f09b9740da049.jpg?v=1788275493","url":"https:\/\/voomisupply.com\/products\/value-collection-gh8790487-counterbore-3-4-in-hss-3-flute","provider":"Voomi Supply","version":"1.0","type":"link"}