{"product_id":"precision-twist-drill-5999052-screw-machine-drill-bit","title":"Precision Twist Drill 5999052 Screw Machine Drill Bit","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe PRECISION TWIST DRILL 5999052 is a screw machine length drill bit designed for high-performance metal cutting in demanding trade and industrial applications. Built from high speed steel with a coated finish, this bit features a 0.386 inch (Letter W) diameter, a 135-degree split point, and web thinning for reduced thrust and faster penetration. The straight-cylindrical shank seats securely in standard drill chucks. At 3.25 inches overall length with a 1.875 inch flute length, it is sized for short-hole work in tight setups such as machine tools, drill presses, and CNC spindles. Licensed machinists and maintenance techs specify this series for its heavy duty grade and compliance with ANSI and NAS 907 standards.\u003c\/p\u003e\u003cp\u003eThis bit is rated for primary use in titanium workpieces, making it well suited for aerospace MRO, industrial fabrication, and precision machining environments where tool life and hole quality are critical. The R42C series combines a regular spiral flute, tapered web configuration, and a 2.5xD flute-to-diameter ratio to balance chip evacuation and rigidity. No coolant-through capability is present, so flood or mist cooling applied externally is standard practice when drilling titanium.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e0.386 inch diameter, Letter W sizing per ANSI standards\u003c\/li\u003e\n\u003cli\u003e135-degree split point with web thinning reduces walking and lowers thrust requirements\u003c\/li\u003e\n\u003cli\u003eHigh speed steel construction with coated finish extends tool life in hard materials\u003c\/li\u003e\n\u003cli\u003eScrew machine length (3.25 inches overall) provides maximum rigidity for short-hole drilling\u003c\/li\u003e\n\u003cli\u003eRight hand cut, regular spiral flute for efficient chip removal\u003c\/li\u003e\n\u003cli\u003eMeets ANSI and NAS 907 specifications for heavy duty, high performance applications\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-style replacement or direct-use screw machine drill bit for standard straight-shank drill chucks and collet holders accepting a 0.386 inch shank diameter.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation is performed by machinists and maintenance technicians using drill presses, milling machines, or CNC machining centers. Always power down and lock out the spindle before changing tooling. Secure the straight-cylindrical shank fully into the chuck or collet to the recommended engagement depth before tightening. When drilling titanium, apply external flood or mist cooling and use appropriate feeds and speeds to prevent work hardening and premature tool wear.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Bit Size (Decimal Inch)\u003c\/strong\u003e: 0.386 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Bit Size (Letter)\u003c\/strong\u003e: W\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 3.25 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlute Length\u003c\/strong\u003e: 1.875 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\u003ePoint Type\u003c\/strong\u003e: Split Point\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeb Configuration\u003c\/strong\u003e: Tapered, Web-Thinned\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: Coated\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\u003eFlute Type\u003c\/strong\u003e: Spiral, Regular\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\u003eDrill Length Type\u003c\/strong\u003e: Screw Machine\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrimary Workpiece Material\u003c\/strong\u003e: Titanium\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Bit Grade\u003c\/strong\u003e: Heavy Duty\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTool Performance\u003c\/strong\u003e: High Performance\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoolant Through\u003c\/strong\u003e: No\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: R42C\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandards\u003c\/strong\u003e: ANSI, NAS 907\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.48 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: 5999052\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"PRECISION TWIST DRILL","offers":[{"title":"Default Title","offer_id":51709745103154,"sku":"5999052","price":21.62,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/97d9c1a48be10944f182f0864c814996.jpg?v=1788459904","url":"https:\/\/voomisupply.com\/products\/precision-twist-drill-5999052-screw-machine-drill-bit","provider":"Voomi Supply","version":"1.0","type":"link"}