{"product_id":"chicago-latrobe-50821-screw-machine-drill-bit-0-375-in-cobalt","title":"Chicago-latrobe 50821 Screw Machine Drill Bit 0.375 in Cobalt","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe CHICAGO-LATROBE 50821 is a screw machine length cobalt drill bit designed for high-performance drilling in ferrous and hard materials. Built from M42 cobalt high-speed steel, it delivers heat and wear resistance that standard HSS bits cannot match in demanding production environments. The 135-degree split point reduces walking on entry and lowers thrust force required at the drill press or CNC spindle. At 0.375 inches in diameter with an overall length of 3.125 inches and a flute length of 1.8125 inches, this stub-length bit provides added rigidity compared to jobber-length equivalents. Web thinning and a parallel web configuration further reduce cutting resistance, making this bit suitable for continuous or high-cycle drilling operations in steel and cast iron.\u003c\/p\u003e\u003cp\u003eThe 50821 is used in machine shops, fabrication facilities, and production environments where hole quality and bit longevity are priorities. Its screw machine (stub) length is the standard choice for drill press, turret lathe, and CNC machining center applications where rigidity matters and shorter overhang reduces deflection. Primary target materials are cast iron and steel, making it appropriate for HVAC equipment fabrication, structural steel work, and general metalworking. The right-hand spiral flute and straight-cylindrical shank ensure compatibility with standard drill chucks and collet holders used across these trades.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eM42 cobalt steel construction provides superior heat resistance for continuous cutting in hard metals\u003c\/li\u003e\n\u003cli\u003e135-degree split point reduces bit walking and lowers entry thrust in steel and cast iron\u003c\/li\u003e\n\u003cli\u003eScrew machine (stub) length of 3.125 inches overall for maximum rigidity and reduced deflection\u003c\/li\u003e\n\u003cli\u003eWeb-thinned parallel web reduces cutting resistance during high-cycle operations\u003c\/li\u003e\n\u003cli\u003eDiameter tolerance of +0.0000 to -0.0010 inches ensures consistent, accurate hole sizing\u003c\/li\u003e\n\u003cli\u003eISO standard compliance for use in quality-controlled production environments\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned for use in standard drill chucks and collet holders accepting straight-cylindrical shanks. Rated for drilling cast iron and steel. Fits Series 559 tooling configurations per CHICAGO-LATROBE specifications.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation and use of this drill bit should be performed by machinists or qualified trade professionals familiar with rotating cutting tools and machine safety. Ensure the workpiece is securely clamped and the spindle is stopped completely before securing or removing the bit from the chuck. Use appropriate cutting fluid for steel and cast iron to extend tool life and maintain hole quality. Follow machine manufacturer guidelines for RPM and feed rate selection based on material hardness and bit diameter.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Bit Diameter\u003c\/strong\u003e: 0.375 inches (3\/8 inch)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 3.125 inches (3-1\/8 inch)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlute Length\u003c\/strong\u003e: 1.8125 inches (1-13\/16 inch)\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: M42 Cobalt High-Speed Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating\u003c\/strong\u003e: Coated\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: Spiral, 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\u003eWeb Configuration\u003c\/strong\u003e: Parallel, Web-Thinned\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Length Type\u003c\/strong\u003e: Screw Machine\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTool Performance Grade\u003c\/strong\u003e: Heavy Duty\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\u003ePrimary Workpiece Material\u003c\/strong\u003e: Cast Iron, Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoolant Through\u003c\/strong\u003e: No\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandards\u003c\/strong\u003e: ISO\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: 559\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eStandard Information\u003c\/h4\u003e\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: 50821\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"CHICAGO-LATROBE","offers":[{"title":"Default Title","offer_id":51734977020210,"sku":"50821","price":21.93,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/f5d92ffa42f8cc5bf33a2250f5ce0e7b_719a4e4c-6337-4a2e-9233-6407607f9af9.jpg?v=1788768805","url":"https:\/\/voomisupply.com\/products\/chicago-latrobe-50821-screw-machine-drill-bit-0-375-in-cobalt","provider":"Voomi Supply","version":"1.0","type":"link"}