{"product_id":"precision-twist-drill-5996548-cobalt-screw-machine-drill-bit","title":"Precision Twist Drill 5996548 Cobalt Screw Machine Drill Bit","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe PRECISION TWIST DRILL 5996548 is a cobalt screw machine length drill bit designed for high-performance drilling in hard and difficult-to-machine materials. It carries a 0.397 inch (Letter X) diameter and features a 135-degree split point for fast penetration and reduced walking on entry. The M42 cobalt steel construction provides heat resistance during high-speed operations. At 3-5\/16 inches overall length with a 1-15\/16 inch flute length, this stub-length geometry delivers added rigidity compared to jobber-length bits, making it a reliable choice for production drilling environments where deflection must be minimized.\u003c\/p\u003e\u003cp\u003eThis bit is suited for use in screw machine shops, CNC machining centers, drill presses, and hand-held drilling applications where hard ferrous and non-ferrous materials are encountered. The screw machine length format is common in automated and semi-automated production setups where short, stiff tooling reduces chatter and improves hole quality. It is appropriate for use by machinists, tool and die makers, and maintenance technicians working with hard stock.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eM42 cobalt steel construction for heat resistance and extended tool life in hard materials\u003c\/li\u003e\n\u003cli\u003e135-degree split point reduces thrust and eliminates center-punch requirement on most materials\u003c\/li\u003e\n\u003cli\u003eWeb-thinned and tapered web configuration improves chip evacuation and reduces cutting load\u003c\/li\u003e\n\u003cli\u003eScrew machine (stub) length provides increased rigidity and reduced deflection versus jobber bits\u003c\/li\u003e\n\u003cli\u003eStraight-cylindrical shank fits standard drill chucks without additional tooling\u003c\/li\u003e\n\u003cli\u003eRight-hand spiral flute with 2.5xD flute-to-diameter ratio for consistent chip flow\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-style replacement or direct-use cobalt drill bit for screw machine and production drilling applications requiring a 0.397 inch (Letter X) diameter in the 0.3500 to 0.4000 inch size range, per ANSI standards.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation and use should be performed by qualified machinists or trained technicians familiar with rotating cutting tools. Ensure the drill chuck or collet is fully secured and the workpiece is properly clamped before beginning any drilling operation. Appropriate cutting fluid or coolant is recommended when drilling hard materials to extend tool life, noting this bit does not feature through-coolant capability. Follow applicable shop safety standards and machine manufacturer guidelines for spindle speed and feed rate selection.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Bit Size (Decimal Inch)\u003c\/strong\u003e: 0.397 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Bit Size (Letter)\u003c\/strong\u003e: X\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTool Material\u003c\/strong\u003e: Cobalt (M42)\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\u003eDrill Length Type\u003c\/strong\u003e: Screw Machine\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 3-5\/16 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlute Length\u003c\/strong\u003e: 1-15\/16 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\u003eCoolant Through\u003c\/strong\u003e: No\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrimary Workpiece Material\u003c\/strong\u003e: Hard Material\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Bit Grade\u003c\/strong\u003e: Heavy Duty\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\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: 5996548\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"PRECISION TWIST DRILL","offers":[{"title":"Default Title","offer_id":51716464378162,"sku":"5996548","price":33.39,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/691739fe851d894f4ec47cb5cae18c43_529f6bff-357e-4cf2-beb8-1a879d26f3e5.jpg?v=1788526504","url":"https:\/\/voomisupply.com\/products\/precision-twist-drill-5996548-cobalt-screw-machine-drill-bit","provider":"Voomi Supply","version":"1.0","type":"link"}