{"product_id":"precision-twist-drill-5999051-cobalt-jobber-drill-bit-letter-p","title":"Precision Twist Drill 5999051 Cobalt Jobber Drill Bit Letter P","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe PRECISION TWIST DRILL 5999051 is a cobalt jobber-length drill bit sized to Letter P (0.3230 inches) for demanding metal drilling applications. It features a 135-degree split point with web thinning, which reduces walking on entry and lowers thrust requirements compared to a standard 118-degree point. The straw oxide finish provides mild lubricity and heat resistance during high-speed drilling into steel and other ferrous materials. Two regular spiral flutes clear chips efficiently over a flute length of 3.3125 inches. A straight cylindrical shank with zero flats accepts standard three-jaw drill chucks. This bit is sized for professional metalworking, maintenance, and fabrication use and is installed by machinists, millwrights, and skilled tradespeople.\u003c\/p\u003e\n\u003cp\u003eThis jobber drill is suited for drilling steel, cast iron, non-ferrous metals, and high-temperature alloys. The cobalt construction handles harder workpiece materials where standard HSS bits lose edge life quickly. Typical applications include structural steel fabrication, equipment repair, and production drilling where a repeatable hole diameter of 0.3230 inches is required. The series R10CO-R15CO-R18CO designation covers the cobalt oxide-coated jobber line from Precision Twist Drill. Overall length is 4.625 inches, making it compatible with standard drill press and handheld power drill setups where reach is not a limiting factor.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eLetter P diameter — 0.3230 inches — for precise, repeatable hole sizing\u003c\/li\u003e\n  \u003cli\u003eCobalt construction for superior heat resistance and edge retention in steel and hard alloys\u003c\/li\u003e\n  \u003cli\u003e135-degree split point with web thinning reduces walking and lowers feed pressure\u003c\/li\u003e\n  \u003cli\u003eStraw oxide coating adds lubricity and mild corrosion protection during use\u003c\/li\u003e\n  \u003cli\u003eRegular spiral flute geometry promotes efficient chip evacuation at standard feed rates\u003c\/li\u003e\n  \u003cli\u003eMeets ANSI and NAS 907 standards for dimensional accuracy and geometry\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003ePart of the Precision Twist Drill Series R10CO-R15CO-R18CO cobalt oxide jobber line. Fits any standard three-jaw chuck accepting a 0.3230-inch straight cylindrical shank. Rated for primary workpiece material codes P, M, K, N, and S, covering steel, stainless, cast iron, non-ferrous metals, and high-temperature alloys per ISO material classification.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation and use should be performed by qualified machinists or tradespeople familiar with drill press or power drill operation. Secure the shank fully in a properly sized chuck and verify runout before drilling. Apply cutting fluid appropriate to the workpiece material to extend tool life and maintain hole quality. Do not exceed the maximum drilling depth of 3.3125 inches in a single pass without retracting to clear chips.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDrill Bit Size (Letter)\u003c\/strong\u003e: P\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDrill Bit Size (Decimal Inch)\u003c\/strong\u003e: 0.3230 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDrill Bit Material\u003c\/strong\u003e: Cobalt\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 (Bronze)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlute Type\u003c\/strong\u003e: Regular Spiral\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCutting Direction\u003c\/strong\u003e: Right Hand\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNumber of Flutes\u003c\/strong\u003e: 2\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlute Length\u003c\/strong\u003e: 3.3125 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 4.625 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 0.3230 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Length\u003c\/strong\u003e: 1.3125 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\u003eMaximum Drilling Depth\u003c\/strong\u003e: 3.3125 inches\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: 0.083 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: 5999051\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"PRECISION TWIST DRILL","offers":[{"title":"Default Title","offer_id":51695811854642,"sku":"5999051","price":25.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/43023b3e6b6bab88a536782a7f7f19eb_1b208cd2-2731-4ed5-9233-ea33faef3eb1.jpg?v=1788338437","url":"https:\/\/voomisupply.com\/products\/precision-twist-drill-5999051-cobalt-jobber-drill-bit-letter-p","provider":"Voomi Supply","version":"1.0","type":"link"}