{"product_id":"hertel-c-e05-0531-aircraft-extension-drill-bit-size-4","title":"Hertel C.E05.0531 Aircraft Extension Drill Bit Size 4","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe HERTEL C.E05.0531 is a wire gauge size 4 aircraft extension drill bit designed for deep-reach drilling applications where a standard-length bit cannot access the work area. Built from high-speed steel with an oxide finish, this bit features a 135-degree split point that is self-centering and eliminates the need for a center punch on most materials. The tapered web-thinned construction reduces cutting resistance and improves chip evacuation. At 12 inches overall length with a 2.5-inch spiral flute, it is the right tool for reaching into confined spaces in aerospace, automotive, and structural fabrication work. Meets NAS 907 standards.\u003c\/p\u003e\n\u003cp\u003eThis bit is suited for general-purpose drilling in metal, aluminum, and composite materials where extended reach is required. Typical applications include drilling through airframe structures, deep cavities in machinery, and stacked materials that exceed the reach of conventional jobber-length bits. The straight cylindrical shank accepts standard drill chucks without adapters. Right-hand cutting direction is standard for use with conventional corded or cordless drills and drill presses. The 0.2090-inch decimal diameter corresponds to wire gauge size 4.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e135-degree split point is self-centering and reduces walking on entry\u003c\/li\u003e\n  \u003cli\u003e12-inch overall length provides extended reach into deep or confined spaces\u003c\/li\u003e\n  \u003cli\u003eHigh-speed steel construction handles a broad range of metals and composites\u003c\/li\u003e\n  \u003cli\u003eOxide finish provides light corrosion resistance and reduces friction during cutting\u003c\/li\u003e\n  \u003cli\u003eTapered web with web thinning lowers thrust force and improves chip flow\u003c\/li\u003e\n  \u003cli\u003eMeets NAS 907 standard for aircraft-quality drill bits\u003c\/li\u003e\n  \u003cli\u003e2-flute spiral design with 2.5-inch flute length clears chips efficiently\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as a general-purpose aircraft extension drill bit in wire gauge size 4 (0.2090 inches) with a straight cylindrical shank; fits any standard drill chuck sized for a 0.2090-inch shank diameter.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eThis bit is typically installed and used by machinists, aerospace technicians, and metalworking tradespeople. Secure the straight shank firmly in a keyed or keyless chuck before operation and verify the bit runs true before engaging the workpiece. Use appropriate cutting fluid for ferrous metals to extend tool life and maintain hole quality. Wear ANSI-rated eye protection and secure the workpiece to prevent rotation during drilling.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDrill Bit Size (Wire Gauge)\u003c\/strong\u003e: 4\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDrill Bit Size (Decimal)\u003c\/strong\u003e: 0.2090 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 12 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlute Length\u003c\/strong\u003e: 2.5 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\u003eSelf-Centering\u003c\/strong\u003e: Yes\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: 0.2090 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeb Configuration\u003c\/strong\u003e: Tapered\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeb Thinning\u003c\/strong\u003e: Web-Thinned\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCutting Direction\u003c\/strong\u003e: Right Hand\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\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.E05.0531\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"HERTEL","offers":[{"title":"Default Title","offer_id":51738451640626,"sku":"C.E05.0531","price":22.52,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/bebb5e66abcc12c6d3c315a1f2a345b8.jpg?v=1788799665","url":"https:\/\/voomisupply.com\/products\/hertel-c-e05-0531-aircraft-extension-drill-bit-size-4","provider":"Voomi Supply","version":"1.0","type":"link"}