{"product_id":"precision-twist-drill-5998618-screw-machine-drill-bit","title":"Precision Twist Drill 5998618 Screw Machine Drill Bit","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe PRECISION TWIST DRILL 5998618 is a screw machine length drill bit designed for high-performance drilling in demanding applications. Machined from high speed steel with a coated finish, this bit features a 135-degree split point and web-thinned, tapered web construction that reduces thrust and improves chip evacuation. At 0.2055 inches in diameter (Wire Size 5) with a 2.5xD flute-to-diameter ratio, it delivers consistent, accurate hole entry. The right-hand spiral flute and straight cylindrical shank make it compatible with standard drill chucks on manual and CNC machine setups. It is rated for heavy duty use and classified as a high-performance tool under ANSI and NAS standards.\u003c\/p\u003e\u003cp\u003eThis bit is built for use in screw machine operations and short-hole drilling tasks where rigidity and precision entry matter. The screw machine length format provides added stiffness compared to jobber length bits, reducing deflection in tight-tolerance work. Primary workpiece material is titanium, making this bit suitable for aerospace, precision machining, and other hard-material applications where a split-point, web-thinned geometry is required. It is sold individually and suits professional machinists and toolroom technicians working in production or job-shop environments.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e135-degree split point reduces walking and lowers drilling thrust on entry\u003c\/li\u003e\n\u003cli\u003eWeb-thinned, tapered web construction improves chip flow and reduces heat buildup\u003c\/li\u003e\n\u003cli\u003eHigh speed steel construction with coated finish for wear resistance in hard materials\u003c\/li\u003e\n\u003cli\u003eScrew machine length format provides greater rigidity and less deflection than jobber length\u003c\/li\u003e\n\u003cli\u003eRight-hand cut with regular spiral flute for standard drill press and CNC chuck use\u003c\/li\u003e\n\u003cli\u003eMeets ANSI and NAS 907 specifications for heavy duty, high-performance drilling\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as a screw machine length replacement or production-use drill bit rated for titanium and other hard primary workpiece materials, fitting any standard straight-cylindrical shank chuck within the 0.2000 to 0.2500 inch drill bit size range.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eThis bit is installed by a machinist or toolroom technician into any drill press, turret lathe, or CNC machine equipped with a chuck accepting a straight cylindrical shank. Ensure the machine spindle is fully stopped and locked out before changing bits. Secure the shank fully in the chuck to prevent runout. Avoid side-loading the bit during drilling, as this can cause premature edge wear or bit breakage in hard materials like titanium.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Bit Size (Wire)\u003c\/strong\u003e: 5\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Bit Size (Decimal Inch)\u003c\/strong\u003e: 0.2055 inches\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\u003eDrill Point Angle\u003c\/strong\u003e: 135 degrees\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePoint Type\u003c\/strong\u003e: Split\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\u003eOverall Length\u003c\/strong\u003e: 2.375 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlute Length\u003c\/strong\u003e: 1.25 inches\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\u003eWeb Configuration\u003c\/strong\u003e: Tapered\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeb Thinning\u003c\/strong\u003e: Web-Thinned\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\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\u003eDrill Bit Size Range\u003c\/strong\u003e: 0.2000 to 0.2500 inches\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: R41C\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: 0.22 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: 5998618\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"PRECISION TWIST DRILL","offers":[{"title":"Default Title","offer_id":51720407548210,"sku":"5998618","price":14.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/167e9608a60d2e30df1ed5354a7211c3.jpg?v=1788563549","url":"https:\/\/voomisupply.com\/products\/precision-twist-drill-5998618-screw-machine-drill-bit","provider":"Voomi Supply","version":"1.0","type":"link"}