{"product_id":"hertel-18763-countersink-3-8-in-90-degree-4-flute-hss","title":"Hertel 18763 Countersink 3\/8 in 90 Degree 4 Flute Hss","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe HERTEL 18763 is a 4-flute high speed steel countersink designed for producing clean, accurate countersunk holes in metal and other materials. With a 3\/8 inch head diameter and a 90-degree included angle, this tool is suited for standard fastener seat preparation in production and maintenance machining environments. The straight cylindrical shank measures 3\/8 inch in diameter, providing solid tool holding in standard drill chucks and collet systems. Machinists, tool and die technicians, and maintenance mechanics commonly select this countersink for deburring, chamfering, and fastener recess work across a range of materials.\u003c\/p\u003e\n\u003cp\u003eThe HERTEL 18763 is appropriate for use in manual drill presses, CNC machining centers, and hand-held power tools where a 3\/8 inch shank holder is available. The 90-degree included angle matches the seating geometry required by flat-head machine screws and standard aerospace and industrial fasteners. This tool is suited for light to medium-duty countersinking in ferrous metals, aluminum, and plastics in both shop and field maintenance applications.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e3\/8 inch head diameter for standard fastener seat preparation\u003c\/li\u003e\n  \u003cli\u003e90-degree included angle matches common flat-head fastener geometry\u003c\/li\u003e\n  \u003cli\u003e4 flutes provide smooth cutting action and improved chip evacuation\u003c\/li\u003e\n  \u003cli\u003eHigh speed steel construction offers good wear resistance across a range of workpiece materials\u003c\/li\u003e\n  \u003cli\u003eStraight cylindrical shank fits standard drill chucks and collet toolholders\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as a standard straight-shank countersink for use in drill presses, machining centers, and hand-held power tools accepting a 3\/8 inch cylindrical shank.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eSecure the tool firmly in a compatible chuck or collet before operation and verify runout is within acceptable limits for the application. Use appropriate cutting fluid or lubricant when countersinking ferrous metals to extend tool life and improve finish quality. Always power down and lock out the machine before changing or adjusting tooling. Follow applicable shop safety practices and machine manufacturer guidelines for speed and feed selection.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHead Diameter\u003c\/strong\u003e: 3\/8 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 3\/8 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eIncluded Angle\u003c\/strong\u003e: 90 degrees\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNumber of Flutes\u003c\/strong\u003e: 4\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Type\u003c\/strong\u003e: Straight Cylindrical\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: High Speed Steel\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUNSPSC Code\u003c\/strong\u003e: 27112812\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: HERTEL\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 18763\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"HERTEL","offers":[{"title":"Default Title","offer_id":51753118040370,"sku":"18763","price":91.54,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/aa2e0eaf04daeaf0ad5c174fc451ba65.jpg?v=1788932982","url":"https:\/\/voomisupply.com\/products\/hertel-18763-countersink-3-8-in-90-degree-4-flute-hss","provider":"Voomi Supply","version":"1.0","type":"link"}