{"product_id":"precision-twist-drill-6001254-aircraft-extension-drill-bit","title":"Precision Twist Drill 6001254 Aircraft Extension Drill Bit","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe PRECISION TWIST DRILL 6001254 is a high speed steel aircraft extension drill bit designed for reaching deep or obstructed hole locations that standard-length drills cannot access. Built to wire size 22 (0.157 inches decimal), it features a 135-degree split point that is self-centering and eliminates the need for a center punch on most metals. The two-flute spiral design with web thinning and a tapered web configuration reduces cutting resistance and improves chip evacuation. At 12 inches overall length with a 2-inch flute length, this bit is suited for aviation, fabrication, and general metalworking applications. The oxide finish provides light surface protection. Licensed HVAC and sheet metal technicians, aviation maintenance techs, and industrial fabricators are the primary installers.\u003c\/p\u003e\u003cp\u003eThis drill bit is built to NAS 907 Type B standards, making it appropriate for aerospace and precision metalworking environments. The straight-cylindrical shank at 0.157 inches diameter fits standard drill chucks without modification. Its extended reach makes it a practical choice for drilling through structural assemblies, firewall penetrations, sheet metal stacks, and tight-clearance installations where a jobber-length bit would not seat properly. Right-hand cutting direction is standard for conventional drill press and handheld electric drill use.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eWire size 22 (0.157 inches) with matching straight-cylindrical shank diameter for secure chuck grip\u003c\/li\u003e\n\u003cli\u003e135-degree split point with self-centering geometry reduces walking without a center punch\u003c\/li\u003e\n\u003cli\u003eWeb-thinned, tapered web construction lowers thrust force and improves chip flow\u003c\/li\u003e\n\u003cli\u003e12-inch overall length provides extended reach into deep or restricted drilling locations\u003c\/li\u003e\n\u003cli\u003eHigh speed steel construction rated for general-purpose cutting in ferrous and non-ferrous metals\u003c\/li\u003e\n\u003cli\u003eMeets NAS 907 Type B standard for aerospace-grade drill bit performance\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as a general-purpose aircraft extension drill bit compatible with any standard drill chuck accepting a 0.157-inch straight-cylindrical shank, suitable for right-hand drilling operations in metalworking and aviation maintenance applications.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation should be performed by qualified machinists, aviation maintenance technicians, or experienced fabricators familiar with proper drilling technique in metal substrates. Secure the workpiece firmly before drilling and confirm chuck tightness before operation. Use appropriate cutting fluid for ferrous metals to extend bit life and maintain hole quality. Inspect the split point for chipping or wear before each use and replace if point geometry is compromised.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Bit Size (Wire)\u003c\/strong\u003e: 22\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Bit Size (Decimal)\u003c\/strong\u003e: 0.157 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 inches\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: 0.157 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\u003eSelf-Centering\u003c\/strong\u003e: Yes\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\u003eCutting Direction\u003c\/strong\u003e: Right Hand\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 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\u003eSeries\u003c\/strong\u003e: 501-12\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandard\u003c\/strong\u003e: NAS 907 Type B\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.042 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: PRECISION TWIST DRILL\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 6001254\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"PRECISION TWIST DRILL","offers":[{"title":"Default Title","offer_id":51696029696306,"sku":"6001254","price":27.02,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/da3496e4617881f200db3c68936287ae_ea56c5fe-37f5-4e92-8544-fe35d60a4184.jpg?v=1788339838","url":"https:\/\/voomisupply.com\/products\/precision-twist-drill-6001254-aircraft-extension-drill-bit","provider":"Voomi Supply","version":"1.0","type":"link"}