{"product_id":"precision-twist-drill-5996557-cobalt-screw-machine-drill-bit","title":"Precision Twist Drill 5996557 Cobalt Screw Machine Drill Bit","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe PRECISION TWIST DRILL 5996557 is a cobalt screw machine length drill bit engineered for drilling into hard materials where standard high-speed steel bits fall short. It measures 0.413 inches (Letter Size Z) in diameter with a 3.375-inch overall length and a 2-inch flute length. The 135-degree split point reduces walking on contact and lowers the thrust force needed to start the hole. A tapered web with web thinning keeps the cutting geometry aggressive through the full depth of cut. This bit is built to ANSI standards and carries an M42 cobalt material grade, making it a heavy-duty tool suited for machinists, maintenance technicians, and metalworking professionals.\u003c\/p\u003e\u003cp\u003eScrew machine length bits are shorter than jobber-length bits, which increases rigidity and reduces deflection in turret lathes, drill presses, and CNC screw machine setups. The reduced length is also practical for tight-clearance hand-drilling applications on hard steels, stainless, high-nickel alloys, and similarly tough workpiece materials. The straight cylindrical shank fits standard drill chucks without adapters. The regular spiral flute with a 2.5xD flute-to-diameter ratio promotes chip evacuation in short-hole applications on hard stock.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eM42 cobalt construction rated for hard material drilling including stainless and high-alloy steels\u003c\/li\u003e\n\u003cli\u003e135-degree split point reduces entry thrust and minimizes bit walking on hard surfaces\u003c\/li\u003e\n\u003cli\u003eScrew machine length body increases rigidity and reduces deflection compared to jobber-length bits\u003c\/li\u003e\n\u003cli\u003eTapered web with web thinning maintains cutting efficiency and reduces heat buildup\u003c\/li\u003e\n\u003cli\u003eRight-hand cut, regular spiral flute promotes consistent chip removal\u003c\/li\u003e\n\u003cli\u003eBuilt to ANSI standards for dimensional consistency across tooling setups\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned for use in standard drill chucks accepting a straight cylindrical shank. Part of the M42CO Series, intended for high-performance drilling in hard and abrasion-resistant workpiece materials.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation and use should be performed by qualified machinists or metalworking technicians familiar with drill press, lathe, or CNC machine operation. Secure the workpiece and verify chuck tightness before initiating the cut. Appropriate cutting fluid or coolant is recommended when drilling hard materials to extend tool life, even though this bit does not support through-coolant delivery. Follow all applicable machine shop safety protocols including eye protection and proper spindle speed selection for the workpiece material and bit diameter.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Bit Size (Letter)\u003c\/strong\u003e: Z\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Bit Size (Decimal Inch)\u003c\/strong\u003e: 0.413 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 3.375 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlute Length\u003c\/strong\u003e: 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\u003ePoint Type\u003c\/strong\u003e: Split\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTool Material\u003c\/strong\u003e: Cobalt (M42 Grade)\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\u003eWeb Configuration\u003c\/strong\u003e: Tapered with Web Thinning\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\u003eStandards\u003c\/strong\u003e: ANSI\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Bit Grade\u003c\/strong\u003e: Heavy Duty\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.083 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: 5996557\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"PRECISION TWIST DRILL","offers":[{"title":"Default Title","offer_id":51689430417714,"sku":"5996557","price":37.28,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/691739fe851d894f4ec47cb5cae18c43.jpg?v=1788259400","url":"https:\/\/voomisupply.com\/products\/precision-twist-drill-5996557-cobalt-screw-machine-drill-bit","provider":"Voomi Supply","version":"1.0","type":"link"}