{"product_id":"precision-twist-drill-5996664-cobalt-screw-machine-drill-bit","title":"Precision Twist Drill 5996664 Cobalt Screw Machine Drill Bit","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe PRECISION TWIST DRILL 5996664 is a cobalt screw machine length drill bit designed for drilling into hard and tough materials in production and shop environments. Built from M42 cobalt high-speed steel, it delivers heat resistance and edge retention that standard HSS bits cannot match. The bit measures 0.266 inches (17\/64 inches, Letter H) in diameter with an overall length of 2-11\/16 inches and a flute length of 1-1\/2 inches. The 135-degree split point reduces walking and requires no center punch on most materials. Licensed machinists, tool-and-die technicians, and maintenance mechanics are the primary users of this bit.\u003c\/p\u003e\n\u003cp\u003eThis bit is suited for screw machine operations, CNC drilling centers, drill presses, and hand-held drilling applications where a short, rigid bit is preferred to reduce deflection. Its compact screw machine length profile provides added stiffness compared to jobber-length bits, making it a practical choice when drilling in confined setups or when hole-position accuracy is critical. The 2.5xD flute-to-diameter ratio and tapered web configuration support chip evacuation in short-hole applications on ferrous and hard non-ferrous workpieces.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eM42 cobalt steel construction for high-performance drilling in hard and abrasive materials\u003c\/li\u003e\n  \u003cli\u003e135-degree split point reduces thrust and eliminates walking without center-punching\u003c\/li\u003e\n  \u003cli\u003eWeb-thinned, tapered web design promotes efficient chip removal\u003c\/li\u003e\n  \u003cli\u003eScrew machine length body increases rigidity and reduces deflection versus jobber-length bits\u003c\/li\u003e\n  \u003cli\u003eStraight-cylindrical shank fits standard drill chucks without adapters\u003c\/li\u003e\n  \u003cli\u003eMeets ANSI standards; rated for heavy-duty use in the M42 material grade\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as an OEM-style replacement or direct-use screw machine drill bit compatible with standard drill chucks and collet holders accepting a straight-cylindrical shank in the 17\/64-inch diameter range.\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 tools. Secure the shank fully in the chuck or collet and verify runout before drilling. Always wear appropriate eye protection and follow shop safety procedures when operating drilling equipment. Coolant-through operation is not supported on this bit; use external cutting fluid on hard materials 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 (Decimal Inch)\u003c\/strong\u003e: 0.2660 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDrill Bit Size (Fraction)\u003c\/strong\u003e: 17\/64 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDrill Bit Size (Letter)\u003c\/strong\u003e: H\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 2-11\/16 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlute Length\u003c\/strong\u003e: 1-1\/2 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\u003eTool Material\u003c\/strong\u003e: Cobalt (M42 Grade)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Type\u003c\/strong\u003e: Straight-Cylindrical\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\u003ePoint Type\u003c\/strong\u003e: Split\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeb Configuration\u003c\/strong\u003e: Tapered, Web-Thinned\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCutting Direction\u003c\/strong\u003e: Right Hand\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: Hard Material\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: M42CO\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eStandard\u003c\/strong\u003e: ANSI\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.042 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: 5996664\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"PRECISION TWIST DRILL","offers":[{"title":"Default Title","offer_id":51709462511922,"sku":"5996664","price":19.52,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/691739fe851d894f4ec47cb5cae18c43_65aa2792-ce1b-4c99-86c8-32e2c87742c5.jpg?v=1788456751","url":"https:\/\/voomisupply.com\/products\/precision-twist-drill-5996664-cobalt-screw-machine-drill-bit","provider":"Voomi Supply","version":"1.0","type":"link"}