{"product_id":"titan-usa-tr97474-solid-pilot-counterbore-0-312-in-4-flute-hss","title":"Titan Usa TR97474 Solid Pilot Counterbore 0.312 in 4 Flute Hss","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe TITAN USA TR97474 is a solid pilot counterbore designed for precise counterboring operations in metal fabrication and machining environments. Built from high speed steel (HSS) with a bright, uncoated finish, this tool delivers a 0.312-inch counterbore diameter and a 0.19-inch standard pilot diameter across 4 flutes for clean, accurate seat formation. The 9\/32-inch shank diameter and 5.25-inch overall length make it compatible with standard drill press and milling setups. Machinists and tool-and-die professionals rely on this type of counterbore to create flat-bottomed recesses that allow cap screw heads to sit flush or below a workpiece surface.\u003c\/p\u003e\u003cp\u003eThis counterbore is sized for use with No. 10 cap screws, making it a common selection for light mechanical assemblies, fixture fabrication, and general machine shop work. It is suited for use in ferrous and non-ferrous metals where a standard HSS tool meets the hardness requirements of the workpiece. The standard pilot configuration locates the tool accurately in a pre-drilled clearance hole, ensuring concentricity between the pilot bore and the counterbore seat.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e0.312-inch counterbore diameter (5\/16 inch fractional equivalent) for No. 10 cap screw compatibility\u003c\/li\u003e\n\u003cli\u003e0.19-inch standard pilot diameter ensures accurate self-location in pre-drilled holes\u003c\/li\u003e\n\u003cli\u003e4-flute geometry for efficient chip clearance and smooth seat finish\u003c\/li\u003e\n\u003cli\u003eHigh speed steel construction provides durability across a range of metalworking applications\u003c\/li\u003e\n\u003cli\u003eBright, uncoated finish — no coating to flake or interfere with tight-tolerance fits\u003c\/li\u003e\n\u003cli\u003e9\/32-inch shank diameter fits standard collets and drill chuck configurations\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned for use with No. 10 cap screws. Sized to counterbore clearance holes in applications where a 5\/16-inch counterbore seat is required. Confirm workpiece material hardness is within the rated range of high speed steel tooling before use.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eThis counterbore is installed and operated by machinists using a drill press, milling machine, or similar rotating spindle equipment. Always secure the workpiece firmly and ensure the spindle speed is appropriate for the workpiece material and tool diameter before starting the cut. Power down and lock out the machine before changing or inspecting tooling. Do not exceed the tool's rated speed range for HSS cutters in hard ferrous materials.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCounterbore Diameter\u003c\/strong\u003e: 0.312 inches (5\/16 inch)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePilot Diameter\u003c\/strong\u003e: 0.19 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePilot Type\u003c\/strong\u003e: Standard\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Flutes\u003c\/strong\u003e: 4\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 9\/32 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 5.25 inches\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\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFastener Compatibility\u003c\/strong\u003e: Cap Screw, No. 10\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.09 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: TITAN USA\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: TR97474\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"TITAN USA","offers":[{"title":"Default Title","offer_id":51748415045938,"sku":"TR97474","price":62.37,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/e3b05e14a43002478b68ffb2ef61daed_9c8cc58e-94f7-4973-aaeb-31ca838c9dd8.jpg?v=1788893512","url":"https:\/\/voomisupply.com\/products\/titan-usa-tr97474-solid-pilot-counterbore-0-312-in-4-flute-hss","provider":"Voomi Supply","version":"1.0","type":"link"}