{"product_id":"precision-twist-drill-5995988-cobalt-drill-bit-no-19","title":"Precision Twist Drill 5995988 Cobalt Drill Bit No.19","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe PRECISION TWIST DRILL 5995988 is a high-performance cobalt aircraft extension drill bit designed for drilling tough materials where standard HSS tooling falls short. Built to Series CO501-6 specifications, this bit features a 135-degree split point that is self-centering and web-thinned, reducing walking and thrust on entry. The 0.166-inch diameter straight-cylindrical shank fits standard drill chucks without adapters. The straw finish indicates a heat-treatment process consistent with cobalt alloy tooling. Right-hand spiral flutes with a 4xD flute-to-diameter ratio clear chips efficiently during deep-hole operations. This bit is sized to No. 19 wire gauge and is sold individually.\u003c\/p\u003e\u003cp\u003eThe CO501-6 series is intended for aerospace, maintenance, and fabrication applications where extended reach is required and hole quality must be consistent. The 2.125-inch flute length and 6-inch overall length allow access to recessed locations that standard-length bits cannot reach. Typical users include aircraft maintenance technicians, structural fabricators, and industrial maintenance mechanics working with aluminum, stainless steel, titanium, and other hard alloys. The 135-degree split point geometry reduces the need for a center punch on most metals.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eCobalt tool material provides heat and wear resistance beyond standard HSS for hard and abrasive materials\u003c\/li\u003e\n\u003cli\u003e135-degree split point is self-centering and web-thinned for reduced thrust and clean entry\u003c\/li\u003e\n\u003cli\u003e6-inch overall length with 2.125-inch flute length gives extended reach into deep or recessed workpieces\u003c\/li\u003e\n\u003cli\u003eStraw finish applied post-grind as standard cobalt treatment\u003c\/li\u003e\n\u003cli\u003eTapered web configuration with 4xD flute ratio supports chip evacuation in deeper holes\u003c\/li\u003e\n\u003cli\u003eMeets NAS 907 Type J standards for aircraft drilling applications\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as a Series CO501-6 aircraft extension drill bit for use in standard straight-shank drill chucks. Meets NAS 907 Type J standards applicable to aerospace and industrial drilling operations.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eThis bit is installed by trade machinists, aircraft maintenance technicians, and industrial mechanics using standard drill motors or drill presses with straight-shank chucks. Secure the workpiece before drilling and confirm chuck runout is within acceptable limits to preserve bit geometry and hole tolerance. Use appropriate cutting fluid for the base material to extend tool life. Inspect the split point and cutting edges before each use and replace the bit if chipping or dulling is observed.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Bit Size (Wire)\u003c\/strong\u003e: No. 19\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Bit Size (Decimal)\u003c\/strong\u003e: 0.1660 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: 2.125 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 0.1660 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\u003eFlute Length X Diameter Ratio\u003c\/strong\u003e: 4xD\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\u003eSelf-Centering\u003c\/strong\u003e: Yes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: CO501-6\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandards\u003c\/strong\u003e: NAS 907 Type J\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.042 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage Quantity\u003c\/strong\u003e: 1\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: 5995988\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"PRECISION TWIST DRILL","offers":[{"title":"Default Title","offer_id":51692710494514,"sku":"5995988","price":19.07,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/9a3e48cb1baf3e332194f6fb8f7c2a57_2498a9b4-0d88-47ce-b1c0-5646bf3c47fb.jpg?v=1788301594","url":"https:\/\/voomisupply.com\/products\/precision-twist-drill-5995988-cobalt-drill-bit-no-19","provider":"Voomi Supply","version":"1.0","type":"link"}