{"product_id":"chicago-latrobe-49016-screw-machine-drill-bit-6-70mm-cobalt","title":"Chicago-latrobe 49016 Screw Machine Drill Bit 6.70mm Cobalt","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe CHICAGO-LATROBE 49016 is a screw machine length (stub length) drill bit engineered for high-productivity drilling in ferrous metals. Built from M42 cobalt high-speed steel and finished with a straw oxide coating, it delivers superior heat and wear resistance compared to standard HSS tooling. The 135-degree split point geometry reduces walking and thrust force, promoting accurate hole entry without a center punch. At 2.913 inches overall length with a 1.339-inch flute length, this short-body design is optimized for rigid setups and high-cycle production drilling. The 6.70 mm (0.2638-inch) diameter is held to a tight tolerance of +0.0000 to -0.0010 inches. Licensed machinists, toolroom operators, and maintenance mechanics are the typical users.\u003c\/p\u003e\n\u003cp\u003eThis bit is suited for drilling tool steel, alloyed steel, carbon steel, and cast iron in production and maintenance environments. The stub length reduces deflection in CNC machining centers, turret lathes, drill presses, and hand-held drilling fixtures where rigidity is critical. The Series 559 designation follows DIN 1897 specification, making it a recognized standard form factor for metric-dimensioned work. Maximum drilling depth is rated at 0.923 inches, consistent with the 4xD flute-by-diameter ratio of this stub-length format.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eM42 cobalt HSS construction for elevated heat resistance during prolonged or interrupted cuts\u003c\/li\u003e\n  \u003cli\u003e135-degree split point reduces thrust and self-centers on entry without a pilot hole\u003c\/li\u003e\n  \u003cli\u003eStraw oxide coating provides corrosion resistance and reduced friction at the cutting edge\u003c\/li\u003e\n  \u003cli\u003eDIN 1897 (Series 559) stub length reduces deflection in rigid fixturing and machine tool setups\u003c\/li\u003e\n  \u003cli\u003eRight-hand cut, 2-flute regular spiral geometry provides efficient chip evacuation\u003c\/li\u003e\n  \u003cli\u003eStraight cylindrical shank at 6.70 mm (0.2638 inches) fits standard drill chucks and collets\u003c\/li\u003e\n  \u003cli\u003eTight diameter tolerance of +0.0000 to -0.0010 inches supports consistent hole sizing\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned for use in drill presses, CNC machining centers, turret lathes, and hand-held drilling equipment with chucks or collets accepting a 6.70 mm straight shank. Intended primary workpiece materials are tool steel, alloyed steel, carbon steel, and cast iron.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstall in a properly sized chuck or collet and confirm shank is fully seated and tightened before starting the spindle. Secure the workpiece in a vise or fixture — never hold by hand when drilling ferrous metals. Use appropriate cutting fluid or coolant for the workpiece material to extend tool life, noting this bit does not have through-coolant capability. Inspect the cutting edges for wear or chipping before each use and replace the bit if the split point geometry is compromised.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDrill Bit Diameter\u003c\/strong\u003e: 6.70 mm (0.2638 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 2.913 inches (73.99 mm)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlute Length\u003c\/strong\u003e: 1.339 inches (34.01 mm)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Length\u003c\/strong\u003e: 1.592 inches (40.44 mm)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 6.70 mm (0.2638 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaximum Drilling Depth\u003c\/strong\u003e: 0.923 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 Point\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNumber of Flutes\u003c\/strong\u003e: 2\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSpiral Type\u003c\/strong\u003e: Regular\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCutting Direction\u003c\/strong\u003e: Right Hand\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Type\u003c\/strong\u003e: Straight Cylindrical\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTool Material\u003c\/strong\u003e: Cobalt HSS, Grade M42\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoating\/Finish\u003c\/strong\u003e: Straw Oxide\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoolant Through\u003c\/strong\u003e: No\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDiameter Tolerance\u003c\/strong\u003e: +0.0000 to -0.0010 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlute by Diameter Ratio\u003c\/strong\u003e: 4xD\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSpecification\u003c\/strong\u003e: DIN 1897\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: 559\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.04 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: CHICAGO-LATROBE\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 49016\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"CHICAGO-LATROBE","offers":[{"title":"Default Title","offer_id":51730484560178,"sku":"49016","price":15.92,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/39fde69047a315c406536ed21d268ac9_544775ee-73b0-4849-9a04-11692e93bfd2.jpg?v=1788718283","url":"https:\/\/voomisupply.com\/products\/chicago-latrobe-49016-screw-machine-drill-bit-6-70mm-cobalt","provider":"Voomi Supply","version":"1.0","type":"link"}