{"product_id":"hertel-18300-countersink-1-4-in-90-degree-6-flutes-hss","title":"Hertel 18300 Countersink 1\/4 in 90 Degree 6 Flutes Hss","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe HERTEL 18300 is a 6-flute countersink designed for creating clean, chamfered seating surfaces in metal, wood, and composite materials. Built from high-speed steel, it delivers the edge retention and heat resistance needed for production drilling and fabrication environments. The 90-degree included angle is the standard geometry for flathead fastener seating in general machining and assembly work. The 1\/4-inch shank diameter fits standard drill chucks and quick-change tool holders, making it straightforward to integrate into existing setups. Machinists, tool-and-die techs, and metal fabricators reach for this type of tool when deburring holes or prepping countersunk fastener seats.\u003c\/p\u003e\n\u003cp\u003eThis countersink is suited for light to medium-duty countersinking operations in machine shops, fabrication facilities, and maintenance environments. The straight-cylindrical shank provides positive chuck engagement in hand drills, drill presses, and milling machines. The 6-flute configuration reduces chatter compared to single- or three-flute designs, producing a smoother finish on the chamfer. It is a practical choice for repetitive fastener-hole prep on steel, aluminum, and similar materials where consistent seat geometry is required.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e6 flutes for reduced chatter and improved surface finish on chamfered seats\u003c\/li\u003e\n  \u003cli\u003e90-degree included angle matches standard flathead fastener geometry\u003c\/li\u003e\n  \u003cli\u003eHigh-speed steel construction provides heat resistance and edge retention\u003c\/li\u003e\n  \u003cli\u003e1\/4-inch straight-cylindrical shank fits standard drill chucks and quick-change holders\u003c\/li\u003e\n  \u003cli\u003eCompact 1\/4-inch head diameter suited for small-fastener countersinking applications\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as a standard 1\/4-inch straight-shank countersink compatible with drill presses, hand drills, and milling machine chucks that accept 1\/4-inch cylindrical shanks.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstall in a drill press or hand drill with the chuck securely tightened before operation. Set spindle speed appropriate for the workpiece material — lower speeds for steel, higher for aluminum — to avoid burning the cutting edges. Secure the workpiece firmly before countersinking to prevent grab or chatter. Inspect the cutting edges for wear before use; a dull countersink produces a rough, out-of-round seat.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHead Diameter\u003c\/strong\u003e: 0.25 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 0.25 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: 6\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: High-Speed Steel\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Type\u003c\/strong\u003e: Straight-Cylindrical\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: 18300\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"HERTEL","offers":[{"title":"Default Title","offer_id":51747477520690,"sku":"18300","price":67.81,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/384456b49dd0300452bf62356943b0a6.jpg?v=1788881063","url":"https:\/\/voomisupply.com\/products\/hertel-18300-countersink-1-4-in-90-degree-6-flutes-hss","provider":"Voomi Supply","version":"1.0","type":"link"}