{"product_id":"hertel-c-e03-0391-aircraft-extension-drill-bit-no-23","title":"Hertel C.E03.0391 Aircraft Extension Drill Bit No. 23","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe HERTEL C.E03.0391 is an aircraft extension drill bit designed for drilling in hard-to-reach locations where a standard-length bit cannot reach. Built from high-speed steel with an oxide finish, this bit measures 6 inches in overall length with a 2-inch spiral flute. The 135-degree split point is self-centering and web-thinned, reducing the need for a center punch and helping the bit walk less on entry. Wire gauge size No. 23 corresponds to a decimal diameter of 0.154 inches. A licensed HVAC technician, machinist, or aircraft maintenance professional would typically install or use this bit in light-duty to general-purpose drilling applications.\u003c\/p\u003e\n\u003cp\u003eThis bit is suited for use in sheet metal, aluminum, and similar materials encountered in aircraft maintenance, HVAC ductwork, and general fabrication work. The extended 6-inch overall length is engineered to access recessed surfaces, tight bays, and structural cavities where standard-length bits fall short. The straight cylindrical shank seats in standard drill chucks without adapters. Right-hand cutting direction is standard for conventional drill press or hand-drill use.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e135-degree split point reduces walking and improves self-centering on entry\u003c\/li\u003e\n  \u003cli\u003eWeb-thinned, tapered web configuration lowers thrust requirements during drilling\u003c\/li\u003e\n  \u003cli\u003eHigh-speed steel construction handles general-purpose drilling in metal and similar substrates\u003c\/li\u003e\n  \u003cli\u003eOxide finish provides basic corrosion resistance and lubricity\u003c\/li\u003e\n  \u003cli\u003e6-inch overall length with 2-inch spiral flute for extended reach applications\u003c\/li\u003e\n  \u003cli\u003eStraight cylindrical shank at 0.154 inches fits standard chucks directly\u003c\/li\u003e\n  \u003cli\u003eMeets NAS 907 standards for aircraft extension drill bits\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as a general-purpose aircraft extension drill bit conforming to NAS 907, compatible with standard drill chucks accepting a 0.154-inch straight cylindrical shank.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eThis bit is typically used by machinists, aircraft maintenance technicians, and fabricators with a hand drill or drill press. Secure the shank fully in the chuck before operation and verify the workpiece is clamped to prevent movement. Use appropriate cutting fluid on metal substrates to extend bit life and reduce heat buildup. Inspect the cutting edges for wear or chipping before each use and replace the bit if the point shows signs of damage.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDrill Bit Size (Wire)\u003c\/strong\u003e: No. 23\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDrill Bit Size (Decimal)\u003c\/strong\u003e: 0.154 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 6 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlute Length\u003c\/strong\u003e: 2 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNumber of Flutes\u003c\/strong\u003e: 2\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlute Type\u003c\/strong\u003e: Spiral\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDrill Point Angle\u003c\/strong\u003e: 135 degrees\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePoint Type\u003c\/strong\u003e: Split\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Type\u003c\/strong\u003e: Straight Cylindrical\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 0.154 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: Oxide\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCutting Direction\u003c\/strong\u003e: Right Hand\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSelf-Centering\u003c\/strong\u003e: Yes\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeb Configuration\u003c\/strong\u003e: Tapered, Web-Thinned\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTool Performance\u003c\/strong\u003e: General Purpose\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eStandard\u003c\/strong\u003e: NAS 907\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.15 pounds\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: C.E03.0391\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"HERTEL","offers":[{"title":"Default Title","offer_id":51753010331954,"sku":"C.E03.0391","price":35.85,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/daeb47f8307b3109ce91ed1e8367a342.jpg?v=1788932103","url":"https:\/\/voomisupply.com\/products\/hertel-c-e03-0391-aircraft-extension-drill-bit-no-23","provider":"Voomi Supply","version":"1.0","type":"link"}