{"product_id":"chicago-latrobe-49010-screw-machine-drill-bit-4-20-mm-cobalt","title":"Chicago-latrobe 49010 Screw Machine Drill Bit 4.20 Mm Cobalt","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe CHICAGO-LATROBE 49010 is a screw machine length (stub length) cobalt drill bit designed for high-production drilling in tough ferrous materials. Built to DIN 1897 standards and produced in M42 cobalt high-speed steel, it measures 4.20 mm (0.1654 inches) in diameter with an overall length of 57.02 mm (2.245 inches). The 135-degree split point self-centers on contact and reduces thrust, making it well suited for hard materials where a standard 118-degree point would walk or wear prematurely. A straw oxide coating provides additional lubricity and heat resistance during cutting.\u003c\/p\u003e\n\u003cp\u003eThis bit is intended for production drilling in tool steel, alloyed steel, carbon steel, and cast iron. The stub-length body limits deflection and increases rigidity compared to jobber-length bits, making it a preferred choice for drill press work, CNC machining, and manual spindle operations where hole location accuracy and bit life matter. Maximum drilling depth is 0.5789 inches, consistent with screw machine length applications in sheet stock, plate, and short-depth through-holes.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eM42 cobalt high-speed steel construction for extended tool life in hard and abrasive materials\u003c\/li\u003e\n  \u003cli\u003e135-degree split point self-centers and reduces walking on entry without a center punch\u003c\/li\u003e\n  \u003cli\u003eStraw oxide coating adds lubricity and surface hardness\u003c\/li\u003e\n  \u003cli\u003eStub-length body increases rigidity and reduces deflection in close-tolerance work\u003c\/li\u003e\n  \u003cli\u003eRight-hand cut, regular spiral flute design for standard CW spindle operation\u003c\/li\u003e\n  \u003cli\u003eBuilt to DIN 1897 specification with diameter tolerance of +0.0000 to -0.0007 inches\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned for drilling tool steel, alloyed steel, carbon steel, and cast iron. Compatible with any standard drill press, CNC machining center, or hand drill with a chuck accepting a 4.20 mm straight cylindrical shank.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eSecure the workpiece firmly before drilling and confirm the spindle speed is appropriate for the material and bit diameter. Always power down and de-energize the machine before changing bits or adjusting chuck position. Use cutting fluid or coolant when drilling deep into hard steel to manage heat buildup, as this bit does not support coolant-through delivery. Inspect the split point and cutting edges for chipping or wear before each use; cobalt bits subjected to overheating may lose temper and should be replaced.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDrill Bit Diameter\u003c\/strong\u003e: 4.20 mm (0.1654 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 57.02 mm (2.245 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlute Length\u003c\/strong\u003e: 22.81 mm (0.898 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 4.20 mm (0.1654 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Length\u003c\/strong\u003e: 34.21 mm (1.347 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaximum Drilling Depth\u003c\/strong\u003e: 0.5789 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\u003eFlute Type\u003c\/strong\u003e: Regular Spiral\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Type\u003c\/strong\u003e: Straight Cylindrical\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCutting Direction\u003c\/strong\u003e: Right Hand\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTool Material\u003c\/strong\u003e: M42 Cobalt High-Speed Steel\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoating\/Finish\u003c\/strong\u003e: Straw Oxide\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDiameter Tolerance\u003c\/strong\u003e: +0.0000 to -0.0007 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: 559\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSpecification\u003c\/strong\u003e: DIN 1897\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePrimary Workpiece Materials\u003c\/strong\u003e: Tool Steel, Alloyed Steel, Carbon Steel, Cast Iron\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.01 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: 49010\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"CHICAGO-LATROBE","offers":[{"title":"Default Title","offer_id":51736881135922,"sku":"49010","price":14.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/39fde69047a315c406536ed21d268ac9_f6049b0e-2caa-4bbf-9705-c433cd3f5799.jpg?v=1788781478","url":"https:\/\/voomisupply.com\/products\/chicago-latrobe-49010-screw-machine-drill-bit-4-20-mm-cobalt","provider":"Voomi Supply","version":"1.0","type":"link"}