{"product_id":"precision-twist-drill-5998201-cobalt-jobber-drill-37-64in","title":"Precision Twist Drill 5998201 Cobalt Jobber Drill 37\/64in","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe PRECISION TWIST DRILL 5998201 is a cobalt jobber-length drill bit designed for heavy-duty drilling in steel and other demanding workpiece materials. It features a 37\/64-inch (0.5781-inch) diameter, a 135-degree split point with web thinning for reduced thrust and self-centering entry, and a straw oxide finish that provides lubricity and mild heat resistance. The straight shank and regular spiral flute geometry make it compatible with standard drill chucks across a wide range of drill presses, lathes, and hand-held equipment. This bit is suited for machinists, maintenance technicians, and metalworking tradespeople who require consistent hole quality in ferrous and non-ferrous metals.\u003c\/p\u003e\u003cp\u003eThis jobber drill is built for general-purpose metal drilling applications including structural steel, alloy steel, cast iron, non-ferrous alloys, and heat-resistant superalloys, reflected in its P, M, K, N, and S material group ratings. With an overall length of 6-5\/8 inches and a flute length of 4-13\/16 inches, it handles standard depth holes in production and maintenance environments. It conforms to ANSI standards and the NAS 907 specification, making it appropriate for aerospace and industrial fabrication work where dimensional and tolerance requirements are strict.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eCobalt high-speed steel construction for improved heat resistance in hard and abrasive materials\u003c\/li\u003e\n\u003cli\u003e135-degree split point with web thinning reduces walking and lowers required feed force\u003c\/li\u003e\n\u003cli\u003eStraw oxide finish provides surface lubricity and corrosion resistance during storage and use\u003c\/li\u003e\n\u003cli\u003eRegular spiral flute with tapered web configuration promotes efficient chip evacuation\u003c\/li\u003e\n\u003cli\u003eRight-hand cutting direction, straight cylindrical shank fits standard drill chucks without adapters\u003c\/li\u003e\n\u003cli\u003eMeets ANSI standards and NAS 907 specification for dimensional accuracy\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003ePart of the R10CO-R15CO-R18CO series. Designed as a general-purpose cobalt jobber drill for use in standard drill chucks and compatible with typical drill press, lathe turret, and hand-drill setups. No coolant-through capability; suitable for external coolant or dry drilling applications.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation and use should be performed by qualified machinists or metalworking technicians familiar with speeds and feeds for cobalt tooling. Secure the straight shank firmly in a calibrated drill chuck and verify runout before beginning a production run. Always wear appropriate eye protection and secure the workpiece before drilling. Do not exceed the recommended maximum drilling depth of 4-13\/16 inches for this bit length.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Bit Diameter\u003c\/strong\u003e: 37\/64 inches (0.5781 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 6.625 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlute Length\u003c\/strong\u003e: 4.8125 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 0.5781 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Length\u003c\/strong\u003e: 1.8125 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum Drilling Depth\u003c\/strong\u003e: 4.8125 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\u003eNumber of Flutes\u003c\/strong\u003e: 2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlute Type\u003c\/strong\u003e: Regular Spiral\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeb Configuration\u003c\/strong\u003e: Tapered, Web-Thinned\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting Direction\u003c\/strong\u003e: Right Hand\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Type\u003c\/strong\u003e: Straight Cylindrical\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Cobalt High Speed Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating\/Finish\u003c\/strong\u003e: Straw Oxide\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrimary Workpiece Material\u003c\/strong\u003e: Steel (P, M, K, N, S material groups)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTool Performance\u003c\/strong\u003e: General Purpose, Heavy Duty Grade\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: R10CO-R15CO-R18CO\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecification\u003c\/strong\u003e: ANSI, NAS 907\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoolant Through\u003c\/strong\u003e: No\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDouble Margin\u003c\/strong\u003e: No\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.5 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: 5998201\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"PRECISION TWIST DRILL","offers":[{"title":"Default Title","offer_id":51717425627442,"sku":"5998201","price":84.23,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/48612cbca6d09eb9dfe2c82cf07b8e8a_53488c56-c03a-419a-bc18-66b4741c9cc7.jpg?v=1788540248","url":"https:\/\/voomisupply.com\/products\/precision-twist-drill-5998201-cobalt-jobber-drill-37-64in","provider":"Voomi Supply","version":"1.0","type":"link"}