{"product_id":"precision-twist-drill-5998228-cobalt-jobber-drill-bit-9-16-in","title":"Precision Twist Drill 5998228 Cobalt Jobber Drill Bit 9\/16 in","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe PRECISION TWIST DRILL 5998228 is a 9\/16 inch cobalt jobber-length drill bit designed for heavy-duty drilling in ferrous and non-ferrous metals. Built from high-speed cobalt steel with an oxide and straw finish, it delivers extended tool life in demanding applications. The 135-degree split point reduces walking on entry and requires less axial force than a standard 118-degree point. A web-thinned, tapered web design further reduces cutting resistance. This bit ships individually and is intended for use by machinists, maintenance technicians, pipefitters, and metalworkers running standard drill presses, magnetic drills, or hand-held power tools.\u003c\/p\u003e\n\u003cp\u003eThe 5998228 is rated for general-purpose drilling in steel, cast iron, aluminum, copper, and other workpiece materials covered under material codes P, M, K, N, and S. With a 4-13\/16 inch flute length and 6-5\/8 inch overall length, it handles through-hole and deep-hole work up to 4.8125 inches depth of cut. The straight cylindrical shank fits standard 9\/16 inch chuck capacity. This bit conforms to NAS 907 and ANSI standards, making it appropriate for aerospace and industrial maintenance environments where specification compliance is required.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eCobalt high-speed steel construction for heat and wear resistance in hard materials\u003c\/li\u003e\n  \u003cli\u003e135-degree split point reduces thrust and eliminates center-punch requirement on most metals\u003c\/li\u003e\n  \u003cli\u003eOxide and straw coating provides lubricity and corrosion resistance during cutting\u003c\/li\u003e\n  \u003cli\u003eWeb-thinned tapered web lowers cutting torque and chip-packing risk\u003c\/li\u003e\n  \u003cli\u003eRegular spiral flute geometry promotes efficient chip evacuation in through-hole drilling\u003c\/li\u003e\n  \u003cli\u003eMeets NAS 907 and ANSI standards for use in specification-controlled applications\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned for use in standard drill chucks accepting a 9\/16 inch straight cylindrical shank. Suitable for drilling steel and other metallic workpiece materials classified under P, M, K, N, and S material codes. Part of the R10CO-R15CO-R18CO series from PRECISION TWIST DRILL.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation and use should be performed by qualified machinists or maintenance technicians familiar with rotating cutting tool safety. Secure the workpiece firmly before drilling and confirm chuck tightness before operation. Wear appropriate eye and hand protection per shop safety requirements. Do not exceed the rated maximum drilling depth of 4.8125 inches and apply cutting fluid when drilling hard or thick steel stock to manage heat buildup.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDrill Bit Size\u003c\/strong\u003e: 9\/16 inch (0.5626 inch decimal)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial\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\u003ePoint Type\u003c\/strong\u003e: Standard Split Point, Web-Thinned\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoating\/Finish\u003c\/strong\u003e: Oxide and Straw (Bronze)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 6-5\/8 inches (6.6250 inches decimal)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlute Length\u003c\/strong\u003e: 4-13\/16 inches (4.8125 inches decimal)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 9\/16 inch (0.5625 inch decimal)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Length\u003c\/strong\u003e: 1-13\/16 inches (1.8125 inches decimal)\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\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\u003eShank Type\u003c\/strong\u003e: Straight Cylindrical\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCutting Direction\u003c\/strong\u003e: Right Hand\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 (P, M, K, N, S)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePerformance Grade\u003c\/strong\u003e: Heavy Duty, General Purpose\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eStandards\u003c\/strong\u003e: NAS 907, ANSI\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: 0.5 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: 5998228\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"PRECISION TWIST DRILL","offers":[{"title":"Default Title","offer_id":51692366496050,"sku":"5998228","price":84.23,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/48612cbca6d09eb9dfe2c82cf07b8e8a_5af0b63e-f311-440d-a6c9-5cadb56e661d.jpg?v=1788296825","url":"https:\/\/voomisupply.com\/products\/precision-twist-drill-5998228-cobalt-jobber-drill-bit-9-16-in","provider":"Voomi Supply","version":"1.0","type":"link"}