{"product_id":"precision-twist-drill-5998578-11-16-in-screw-machine-drill-bit","title":"Precision Twist Drill 5998578 11\/16 in Screw Machine Drill Bit","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe PRECISION TWIST DRILL 5998578 is a screw machine length drill bit designed for high-performance drilling in demanding shop and field applications. Manufactured from high speed steel (HSS) with a bright\/uncoated finish, this bit measures 0.6875 inches (11\/16 inch) in diameter with an overall length of 4.625 inches and a flute length of 2.875 inches. The standard 118-degree point angle and web-thinned, tapered web configuration reduce entry force and improve chip evacuation. The Series R40 designation indicates a right-hand cut, regular spiral, spiral flute design built to ANSI standards. Licensed machinists and tool-and-die techs reach for this bit when stub-length rigidity and reduced deflection matter.\u003c\/p\u003e\u003cp\u003eThis bit is rated for use on titanium as its primary workpiece material, making it suitable for aerospace, precision machining, and fabrication environments where harder alloys are common. The screw machine length — shorter overall than a jobber-length bit — provides greater rigidity and reduced runout, which is critical in turret lathes, screw machines, and CNC drilling centers. The 2.5xD flute-to-diameter ratio supports controlled chip clearance at moderate feed rates. Machinists and maintenance technicians working with non-ferrous and exotic metals will find this geometry well suited to their application.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e11\/16 inch (0.6875 inch) diameter with screw machine length for added rigidity and reduced deflection\u003c\/li\u003e\n\u003cli\u003e118-degree standard point angle with web-thinned, tapered web for reduced thrust and cleaner entry\u003c\/li\u003e\n\u003cli\u003eHigh speed steel construction rated for titanium and other demanding workpiece materials\u003c\/li\u003e\n\u003cli\u003eBright\/uncoated finish suitable for use with cutting fluids or dry in general-purpose applications\u003c\/li\u003e\n\u003cli\u003eRight-hand cut, regular spiral flute with 2.5xD flute-to-diameter ratio for efficient chip evacuation\u003c\/li\u003e\n\u003cli\u003eStraight-cylindrical shank fits standard drill chucks and collet holders without adapters\u003c\/li\u003e\n\u003cli\u003eMeets ANSI standards, Series R40\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-style screw machine length drill bit for use in turret lathes, screw machines, CNC machining centers, and hand-held drill equipment with a compatible straight-cylindrical chuck or collet system accepting an 11\/16 inch shank.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eThis bit is installed by machinists and toolroom technicians in machine tool spindles or drill press chucks rated for the shank diameter. Secure the straight shank fully within the chuck or collet before operation, and verify runout with a dial indicator on precision equipment. Apply an appropriate cutting fluid when drilling titanium or other work-hardening alloys to extend tool life and prevent heat buildup. Never exceed the machine spindle speed rating for the workpiece material and bit diameter combination.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Bit Size (Inch)\u003c\/strong\u003e: 11\/16\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Bit Size (Decimal Inch)\u003c\/strong\u003e: 0.6875 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\u003eFlute Length\u003c\/strong\u003e: 2.875 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Point Angle\u003c\/strong\u003e: 118 degrees\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTool Material\u003c\/strong\u003e: High Speed Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating\/Finish\u003c\/strong\u003e: Bright\/Uncoated\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting Direction\u003c\/strong\u003e: Right Hand\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlute Type\u003c\/strong\u003e: Spiral\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpiral Type\u003c\/strong\u003e: Regular\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Type\u003c\/strong\u003e: Straight-Cylindrical\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePoint Type\u003c\/strong\u003e: Standard\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: 2.5xD\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrimary Workpiece Material\u003c\/strong\u003e: Titanium\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Length Type\u003c\/strong\u003e: Screw Machine\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: R40\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandard\u003c\/strong\u003e: ANSI\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoolant Through\u003c\/strong\u003e: No\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.5 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: 5998578\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"PRECISION TWIST DRILL","offers":[{"title":"Default Title","offer_id":51717887590706,"sku":"5998578","price":68.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/20ae1ba3f6f36c8022f7e4fde8274b8a.jpg?v=1788547243","url":"https:\/\/voomisupply.com\/products\/precision-twist-drill-5998578-11-16-in-screw-machine-drill-bit","provider":"Voomi Supply","version":"1.0","type":"link"}