{"product_id":"chicago-latrobe-49018-screw-machine-drill-bit-8-mm-cobalt","title":"Chicago-latrobe 49018 Screw Machine Drill Bit 8 Mm Cobalt","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe CHICAGO-LATROBE 49018 is a screw machine length cobalt drill bit designed for high-production drilling in cast iron and steel. The shortened flute length reduces deflection and increases rigidity compared to jobber-length bits, making it well suited for CNC machining centers, turret lathes, and screw machine operations where stub-length tooling is required. The 135-degree split point starts on contact without a center punch and reduces thrust load. At 8 mm (0.3150 inches) diameter and 3.224 inches overall length, the bit carries a cobalt M42 high-speed steel construction with an oxide coating for heat and wear resistance.\u003c\/p\u003e\n\u003cp\u003eThis bit is intended for professional machining environments where tight tolerances and consistent hole quality in ferrous materials are required. Primary workpiece materials include cast iron and steel. The straight-cylindrical shank accepts standard drill chucks and collet systems. With a 4xD flute-to-diameter ratio and a maximum drilling depth of 1.1025 inches, this bit is optimized for shallow, high-speed production drilling rather than deep-hole applications. It is appropriate for machine shops, maintenance facilities, and fabrication environments.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eM42 cobalt construction for heat resistance in ferrous materials\u003c\/li\u003e\n  \u003cli\u003e135-degree split point for self-centering start and reduced thrust\u003c\/li\u003e\n  \u003cli\u003eScrew machine (stub) length increases rigidity and reduces deflection\u003c\/li\u003e\n  \u003cli\u003eOxide coating improves surface hardness and heat dissipation\u003c\/li\u003e\n  \u003cli\u003eRight-hand cut with regular spiral flutes for efficient chip evacuation\u003c\/li\u003e\n  \u003cli\u003eDiameter tolerance of +0.0000 to -0.0010 inches for consistent hole sizing\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned for use in standard drill chucks and collet systems accepting an 8 mm straight-cylindrical shank. Rated for cast iron and steel workpiece materials. Conforms to DIN 1897 specification for screw machine length twist drills.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstall and remove this bit with the machine fully stopped and the spindle locked. Ensure the chuck or collet is clean and undamaged before seating the straight shank to maintain concentricity. Use appropriate cutting fluid or coolant when drilling steel to extend tool life, noting this bit does not support through-coolant. Replace the bit if runout or diameter tolerance is no longer within acceptable range for the application.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDrill Bit Diameter\u003c\/strong\u003e: 8 mm (0.3150 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 81.89 mm (3.224 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlute Length\u003c\/strong\u003e: 38.35 mm (1.510 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 8 mm (0.3150 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Length\u003c\/strong\u003e: 43.54 mm (1.714 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaximum Drilling Depth\u003c\/strong\u003e: 1.1025 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\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\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: Cobalt M42 High-Speed Steel\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoating\u003c\/strong\u003e: Oxide\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePrimary Workpiece Material\u003c\/strong\u003e: Cast Iron, Steel\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\u003eCoolant Through\u003c\/strong\u003e: No\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eStandard\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\u003eDrill Length Type\u003c\/strong\u003e: Screw Machine\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.05 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: 49018\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"CHICAGO-LATROBE","offers":[{"title":"Default Title","offer_id":51731973865778,"sku":"49018","price":78.64,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/f5d92ffa42f8cc5bf33a2250f5ce0e7b_b03add94-111d-41c3-96fa-3d96ebeacf47.jpg?v=1788737459","url":"https:\/\/voomisupply.com\/products\/chicago-latrobe-49018-screw-machine-drill-bit-8-mm-cobalt","provider":"Voomi Supply","version":"1.0","type":"link"}