{"product_id":"value-collection-gh8830507-counterbore-25-32in-4-flute-hss","title":"Value Collection GH8830507 Counterbore 25\/32in 4 Flute Hss","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe VALUE COLLECTION GH8830507 is an interchangeable pilot counterbore designed for precision counter-boring operations in metal fabrication and aerospace-style applications. Built from high speed steel, this tool delivers durable cutting performance across a range of ferrous and non-ferrous materials. The 25\/32-inch counterbore diameter pairs with a 1\/2-inch straight shank for secure chuck engagement. With 4 flutes and a bright, uncoated finish, the tool provides clean material removal and is suited for right-hand cutting in production and maintenance environments. Licensed machinists, tool-and-die workers, and aircraft maintenance technicians are the primary installers of this tool type.\u003c\/p\u003e\u003cp\u003eThis counterbore is designed for aircraft-style applications where precise seat geometry is required around fastener holes. It accepts an interchangeable pilot with a 3\/16-inch pilot shank diameter, allowing the tool to be adapted to different pilot sizes without replacing the body. At 5-3\/8 inches overall length, it is compatible with standard drill press setups and CNC machining centers where extended reach is needed. Typical use cases include countersinking bolt seats in structural panels, frames, and assemblies.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e25\/32-inch counterbore diameter for accurate fastener seat sizing\u003c\/li\u003e\n\u003cli\u003e1\/2-inch straight shank for standard chuck compatibility\u003c\/li\u003e\n\u003cli\u003eInterchangeable pilot design accepts 3\/16-inch pilot shank diameter\u003c\/li\u003e\n\u003cli\u003e4-flute geometry for smooth, efficient material removal\u003c\/li\u003e\n\u003cli\u003eHigh speed steel construction for durability in metalworking applications\u003c\/li\u003e\n\u003cli\u003eBright, uncoated finish suitable for general-purpose cutting\u003c\/li\u003e\n\u003cli\u003eAircraft style designation for use in aerospace-type fastener applications\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned for use in aircraft-style counterboring applications requiring a 25\/32-inch counterbore diameter and a 3\/16-inch interchangeable pilot shank. Fits standard 1\/2-inch chucks on drill presses and machining centers.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eThis tool is installed and operated by machinists, maintenance technicians, or qualified metalworking professionals. Secure the 1\/2-inch straight shank firmly in the chuck before operation and verify pilot seating before engaging the workpiece. Always power down the machine and bring it to a complete stop before changing pilots or adjusting tool position. Use appropriate cutting fluid for the workpiece material to extend tool life and maintain cut quality.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCounterbore Diameter\u003c\/strong\u003e: 25\/32 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\u003ePilot Shank Diameter Compatibility\u003c\/strong\u003e: 3\/16 inch\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\u003eStyle\u003c\/strong\u003e: Aircraft\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: GH8830507\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"VALUE COLLECTION","offers":[{"title":"Default Title","offer_id":51698455347506,"sku":"GH8830507","price":142.75,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/80027e4991a5df9756ed96375b08f888.jpg?v=1788363114","url":"https:\/\/voomisupply.com\/products\/value-collection-gh8830507-counterbore-25-32in-4-flute-hss","provider":"Voomi Supply","version":"1.0","type":"link"}