{"product_id":"hertel-c-e07-0635-aircraft-drill-bit-e-1-4-in-cobalt-12-in","title":"Hertel C.E07.0635 Aircraft Drill Bit E 1\/4 in Cobalt 12 in","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe HERTEL C.E07.0635 is a cobalt aircraft extension drill bit sized at Letter E (0.2500 inches \/ 1\/4 inch) with a 12-inch overall length, designed for drilling in tight or deep-access applications where standard-length bits cannot reach. The 135-degree split point is self-centering and reduces walking on entry, eliminating the need for a center punch in most setups. A straw finish indicates the cobalt steel has been heat-treated, improving wear resistance and performance in harder base materials. This bit is built for professionals working in aerospace fabrication, structural metalwork, and precision mechanical trades.\u003c\/p\u003e\u003cp\u003eThe C.E07.0635 is suited for drilling ferrous and non-ferrous metals in applications requiring extended reach, such as airframe repair, deep-cavity sheet metal work, and mechanical assembly. The 2-3\/4-inch spiral flute length (2.7500 inches) provides efficient chip evacuation even at depth. The straight cylindrical shank accepts standard drill chucks. Its NAS 907 compliance makes it appropriate for aerospace and military maintenance applications where documented standards are required.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eLetter E (1\/4 inch \/ 0.2500 inch) diameter with straight cylindrical shank of equal diameter\u003c\/li\u003e\n\u003cli\u003e135-degree split point is self-centering and reduces thrust force on entry\u003c\/li\u003e\n\u003cli\u003eCobalt tool steel construction with straw finish for improved heat and wear resistance\u003c\/li\u003e\n\u003cli\u003e12-inch overall length provides extended reach for deep or obstructed drilling locations\u003c\/li\u003e\n\u003cli\u003eTwo-flute right-hand spiral with web-thinned tapered web for reduced cutting resistance\u003c\/li\u003e\n\u003cli\u003eNAS 907 compliant for aerospace and defense maintenance environments\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as a general-purpose aircraft extension drill bit compatible with standard drill chucks accepting a 1\/4-inch straight cylindrical shank. Meets NAS 907 standards for aerospace tooling applications.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eThis bit is installed and used by machinists, aircraft maintenance technicians, and metalworking professionals. Secure the straight shank firmly in a keyed or keyless chuck before operation and verify chuck runout is within acceptable limits to prevent premature bit wear. Use appropriate cutting fluid for the base material to extend tool life. Inspect the split point and cutting edges for wear or chipping before each use, and never force a dull bit through material.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Bit Size (Inch)\u003c\/strong\u003e: 1\/4 inch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Bit Size (Letter)\u003c\/strong\u003e: E\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Bit Size (Decimal Inch)\u003c\/strong\u003e: 0.2500 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: 2-3\/4 inches (2.7500 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 1\/4 inch (0.2500 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Type\u003c\/strong\u003e: Straight Cylindrical\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\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\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\u003eSelf-Centering\u003c\/strong\u003e: Yes\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\u003eTool Performance\u003c\/strong\u003e: General Purpose\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandards\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\u003ch4\u003eStandard Information\u003c\/h4\u003e\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.E07.0635\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"HERTEL","offers":[{"title":"Default Title","offer_id":51734718284082,"sku":"C.E07.0635","price":36.63,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/c3132cd0d45ac13a56a6be41d96b2249.jpg?v=1788765861","url":"https:\/\/voomisupply.com\/products\/hertel-c-e07-0635-aircraft-drill-bit-e-1-4-in-cobalt-12-in","provider":"Voomi Supply","version":"1.0","type":"link"}