{"product_id":"precision-twist-drill-5997842-wire-79-cobalt-drill-bit","title":"Precision Twist Drill 5997842 Wire 79 Cobalt Drill Bit","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe PRECISION TWIST DRILL 5997842 is a wire gauge size 79 cobalt jobber-length drill bit designed for precision drilling in ferrous metals and hard alloys. It features a 135-degree split-point geometry with web thinning, which reduces walking on entry and lowers thrust force required at the spindle. The bit measures 0.75 inches overall with a 0.125-inch flute length and carries a straw oxide finish that provides mild lubricity and heat resistance. Rated as a heavy-duty general-purpose tool, it meets ANSI and NAS 907 standards. Machinists, tool-and-die techs, and maintenance tradespeople reach for this bit when drilling small, tight-tolerance holes in steel and other demanding materials.\u003c\/p\u003e\n\u003cp\u003eThis bit is suited for drilling in steel, cast iron, non-ferrous metals, and high-temperature alloys, covering primary workpiece material codes P, M, K, N, and S. The 9xD flute-to-diameter ratio of this jobber-length configuration makes it a practical choice for through-hole operations in thin stock, sheet metal, and precision machined components. It installs into standard drill chucks and collet systems accepting a 0.0145-inch straight cylindrical shank. The series R10CO-R15CO-R18CO designation indicates it is part of PRECISION TWIST DRILL cobalt oxide-finish product lines intended for production and maintenance shop use.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eCobalt high-speed steel construction for drilling steel and hard alloys\u003c\/li\u003e\n  \u003cli\u003e135-degree split point with web thinning reduces bit walk and feed pressure\u003c\/li\u003e\n  \u003cli\u003eStraw oxide finish adds lubricity and mild corrosion resistance\u003c\/li\u003e\n  \u003cli\u003eRegular spiral, right-hand cutting flute with tapered web configuration\u003c\/li\u003e\n  \u003cli\u003eMeets ANSI and NAS 907 standards for heavy-duty jobber drill classification\u003c\/li\u003e\n  \u003cli\u003eStraight cylindrical shank fits standard drill chucks and collet holders\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as a jobber-length replacement drill bit in the PRECISION TWIST DRILL Series R10CO-R15CO-R18CO cobalt oxide-finish line. Compatible with any standard drill chuck or collet system that accepts a 0.0145-inch straight shank.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation and use of this bit should be performed by machinists or qualified tradespeople familiar with machine tool operation and small-diameter bit handling. Ensure the drill press, lathe, or hand drill is fully powered down and the chuck is secured before changing bits. Small-diameter cobalt bits are brittle under side-loading or flex -- use rigid fixturing and appropriate feed rates to avoid breakage. No coolant-through capability; apply cutting fluid externally when drilling steel to extend tool life.\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: 79\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDrill Bit Size (Decimal Inch)\u003c\/strong\u003e: 0.0145 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDrill Bit Material\u003c\/strong\u003e: Cobalt High Speed Steel\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDrill Point Angle\u003c\/strong\u003e: 135 degrees\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoating\/Finish\u003c\/strong\u003e: Straw Oxide\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlute Type\u003c\/strong\u003e: Regular 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\u003eOverall Length\u003c\/strong\u003e: 0.75 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlute Length\u003c\/strong\u003e: 0.125 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaximum Drilling Depth\u003c\/strong\u003e: 0.125 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 0.0145 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Length\u003c\/strong\u003e: 0.625 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Type\u003c\/strong\u003e: Straight Cylindrical\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeb Configuration\u003c\/strong\u003e: Tapered, Web-Thinned\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlute by Diameter Ratio\u003c\/strong\u003e: 9xD\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoolant Through\u003c\/strong\u003e: No\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePrimary Workpiece Material\u003c\/strong\u003e: Steel (Material Codes P, M, K, N, S)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDrill Bit Grade\u003c\/strong\u003e: Heavy Duty\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eStandards\u003c\/strong\u003e: ANSI, NAS 907\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: R10CO-R15CO-R18CO\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.04167 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: PRECISION TWIST DRILL\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 5997842\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"PRECISION TWIST DRILL","offers":[{"title":"Default Title","offer_id":51696742990130,"sku":"5997842","price":87.03,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/fd6336b34c1d0261f5eb3b4d3e77059f_4379131b-2929-4275-8d77-04791bd9946b.jpg?v=1788345756","url":"https:\/\/voomisupply.com\/products\/precision-twist-drill-5997842-wire-79-cobalt-drill-bit","provider":"Voomi Supply","version":"1.0","type":"link"}