{"product_id":"precision-twist-drill-5998780-screw-machine-drill-bit","title":"Precision Twist Drill 5998780 Screw Machine Drill Bit","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe PRECISION TWIST DRILL 5998780 is a screw machine length drill bit designed for high-performance drilling in metal fabrication and machining applications. Built from high speed steel (HSS) with a bright, uncoated finish, this bit measures 0.191 inches in diameter and delivers a 118-degree standard point angle for reliable starting and cutting accuracy. The web-thinned, tapered web construction reduces thrust and improves chip evacuation. At 2.25 inches overall length with a 1.1875-inch flute length, it fits standard screw machine drilling setups. Licensed machinists and tool-and-die professionals specify this Series R41 bit for tight-tolerance bores where controlled depth and clean entry matter.\u003c\/p\u003e\u003cp\u003eThis drill bit is suited for screw machine operations, CNC drilling, and manual drill press work on ferrous and non-ferrous metals. The primary workpiece material rating is titanium, which indicates capacity for hard and abrasive materials. The 2.5xD flute-to-diameter ratio supports chip clearing in moderate-depth holes. The straight cylindrical shank seats securely in standard drill chucks and collet holders without modification, making it practical for production runs and one-off service work alike.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e0.191 inch (Wire Size #11) diameter, Series R41 screw machine length\u003c\/li\u003e\n\u003cli\u003eHigh speed steel construction rated for titanium and other demanding workpiece materials\u003c\/li\u003e\n\u003cli\u003e118-degree standard point angle with web-thinned, tapered web for reduced thrust\u003c\/li\u003e\n\u003cli\u003eBright, uncoated finish — no coating to flake or delaminate under heavy use\u003c\/li\u003e\n\u003cli\u003eRegular spiral, spiral flute geometry for consistent chip evacuation\u003c\/li\u003e\n\u003cli\u003eStraight cylindrical shank fits standard chucks and collet holders\u003c\/li\u003e\n\u003cli\u003eMeets ANSI standards for geometry and dimensional accuracy\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-style replacement and general-purpose screw machine drill bit for use in standard drill presses, CNC machining centers, and screw machine setups accepting a straight cylindrical shank in the 0.150 to 0.200 inch diameter range.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation is performed by machinists and machine operators. Secure the shank fully in a properly sized chuck or collet before operation and verify runout is within acceptable tolerance for the application. Always power down or lock out the machine before changing tooling. Follow applicable ANSI and shop-safety standards for speed and feed selection based on workpiece material.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Bit Diameter\u003c\/strong\u003e: 0.191 inches (Wire Size #11)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 2.25 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlute Length\u003c\/strong\u003e: 1.1875 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: R41\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandards\u003c\/strong\u003e: ANSI\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.04167 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: 5998780\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"PRECISION TWIST DRILL","offers":[{"title":"Default Title","offer_id":51699912409394,"sku":"5998780","price":14.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/dca8fd70e9f2c0315e0e82fb0671d479.jpg?v=1788383182","url":"https:\/\/voomisupply.com\/products\/precision-twist-drill-5998780-screw-machine-drill-bit","provider":"Voomi Supply","version":"1.0","type":"link"}