{"product_id":"hertel-18509-countersink-1-4-in-120-degree-6-flute-hss","title":"Hertel 18509 Countersink 1\/4 in 120 Degree 6 Flute Hss","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe HERTEL 18509 is a high speed steel countersink designed for creating clean, angled seat profiles in metal and other materials prior to fastener installation. It features a 1\/4 inch head diameter, a 120 degree included angle, and six flutes that distribute cutting load and improve chip evacuation. The straight cylindrical shank measures 1\/4 inch in diameter for direct chuck mounting. This tool is used by machinists, maintenance technicians, pipefitters, and fabricators working on sheet metal, structural components, and pipe flange preparation where precise countersunk fastener seating is required.\u003c\/p\u003e\n\u003cp\u003eThe 18509 is suited for light to medium countersinking operations on ferrous and non-ferrous metals. The 120 degree included angle accommodates fastener head geometries common in industrial and mechanical assembly applications. The six-flute configuration provides a smoother finish on the countersunk seat compared to lower-flute-count tools, making it appropriate for applications where surface quality at the fastener bearing face matters. It is typically installed in a drill press, CNC machine, or handheld drill with a standard chuck capable of accepting a 1\/4 inch straight shank.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e1\/4 inch head diameter for small-diameter countersink applications\u003c\/li\u003e\n  \u003cli\u003e120 degree included angle for industrial fastener seat preparation\u003c\/li\u003e\n  \u003cli\u003eSix flutes for improved chip evacuation and smoother seat finish\u003c\/li\u003e\n  \u003cli\u003eHigh speed steel construction provides durability across metal cutting tasks\u003c\/li\u003e\n  \u003cli\u003e1\/4 inch straight cylindrical shank for standard chuck compatibility\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as a direct-fit countersink for use in any drill press, CNC spindle, or handheld drill accepting a 1\/4 inch straight cylindrical shank; compatible with standard 3-jaw and collet chuck systems.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation and use should be performed by qualified machinists or tradespeople familiar with rotary cutting tool safety. Secure the shank fully in the chuck before operating and verify chuck is tightened to prevent tool walkout. Wear appropriate eye protection and secure the workpiece before beginning any cutting operation. Refer to applicable shop safety standards and tool manufacturer speed recommendations for the material being cut.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHead Diameter\u003c\/strong\u003e: 1\/4 inch\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 1\/4 inch\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Type\u003c\/strong\u003e: Straight Cylindrical\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eIncluded Angle\u003c\/strong\u003e: 120 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\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: 18509\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"HERTEL","offers":[{"title":"Default Title","offer_id":51744769442098,"sku":"18509","price":30.87,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/be58e0bdc1883d26f0a386e87fc1e063.jpg?v=1788860315","url":"https:\/\/voomisupply.com\/products\/hertel-18509-countersink-1-4-in-120-degree-6-flute-hss","provider":"Voomi Supply","version":"1.0","type":"link"}