{"product_id":"hertel-c-e06-0249-aircraft-extension-drill-bit-no-40","title":"Hertel C.E06.0249 Aircraft Extension Drill Bit No. 40","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe HERTEL C.E06.0249 is a No. 40 wire-gauge aircraft extension drill bit engineered for precision drilling in aerospace and structural applications. Manufactured from cobalt high-speed steel, this bit delivers superior heat resistance and edge retention when working through hard metals, stainless steel, and high-strength alloys. The 135-degree split point promotes self-centering on entry, reducing walking and the need for a center punch. A straw finish indicates controlled heat treatment during manufacture. At 6 inches overall length, this extended-reach bit gives technicians access to confined or deep-bore locations that standard-length bits cannot reach. Licensed electricians, aircraft maintenance technicians, and metalworking tradespeople are the primary installers.\u003c\/p\u003e\n\u003cp\u003eThis bit is suited for drilling thin sheet metal, aircraft skin, structural brackets, and similar assemblies where a No. 40 diameter of 0.0980 inches is specified. The 1.375-inch spiral flute efficiently evacuates chips during through-hole drilling in both horizontal and vertical orientations. The straight cylindrical shank seats directly into standard drill chucks without reduction sleeves. Right-hand cutting direction is compatible with conventional drill presses, hand drills, and pneumatic tools common to aircraft maintenance and fabrication shops. General-purpose tool performance rating makes this bit appropriate for production and maintenance work across a broad range of base metals.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eCobalt construction provides elevated heat resistance and extended tool life in hard and abrasive metals\u003c\/li\u003e\n  \u003cli\u003e135-degree split point with self-centering geometry reduces walking on entry and eliminates center-punch steps\u003c\/li\u003e\n  \u003cli\u003eWeb-thinned, tapered web configuration reduces cutting torque and improves chip flow\u003c\/li\u003e\n  \u003cli\u003e6-inch overall length extends reach into confined spaces, deep cavities, and recessed structural members\u003c\/li\u003e\n  \u003cli\u003eStraw finish indicates controlled tempering to preserve cobalt hardness\u003c\/li\u003e\n  \u003cli\u003eMeets NAS 907 standard for aircraft extension drill bits\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as an OEM-style aircraft extension drill bit for use in applications requiring a No. 40 wire-gauge diameter and conformance to NAS 907 standards. Fits standard straight-cylindrical drill chucks sized for a 0.0980-inch shank diameter.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation is performed by qualified machinists, aircraft maintenance technicians, or metalworkers using a compatible drill press, hand drill, or pneumatic drill motor. Ensure the workpiece is securely clamped before drilling to prevent rotation and bit breakage. Use appropriate cutting fluid or lubricant when drilling hard alloys to extend bit life and maintain dimensional accuracy. Inspect the cutting edges before each use and replace bits that show chipping, heat discoloration beyond the straw band, or measurable diameter wear.\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: No. 40\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDrill Bit Size (Decimal)\u003c\/strong\u003e: 0.0980 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: 1.375 inches\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\u003eTool Material\u003c\/strong\u003e: Cobalt\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoating \/ Finish\u003c\/strong\u003e: Straw\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: 0.0980 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlute Type\u003c\/strong\u003e: Spiral\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNumber of Flutes\u003c\/strong\u003e: 2\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCutting Direction\u003c\/strong\u003e: Right Hand\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeb Configuration\u003c\/strong\u003e: Tapered Web-Thinned\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSelf-Centering\u003c\/strong\u003e: Yes\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: 0.01 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.E06.0249\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"HERTEL","offers":[{"title":"Default Title","offer_id":51786838343986,"sku":"C.E06.0249","price":14.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/c5c5c73a11b6e3b27101967c4d05aca1.jpg?v=1789207117","url":"https:\/\/voomisupply.com\/products\/hertel-c-e06-0249-aircraft-extension-drill-bit-no-40","provider":"Voomi Supply","version":"1.0","type":"link"}