{"product_id":"chicago-latrobe-50843-screw-machine-drill-bit-0-302-in-cobalt","title":"Chicago-latrobe 50843 Screw Machine Drill Bit 0.302 in Cobalt","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe CHICAGO-LATROBE 50843 is a cobalt screw machine length drill bit sized at 0.302 inches (Letter N) with a 135-degree split point. It is built for heavy-duty drilling in ferrous materials including cast iron and steel. The shortened screw machine length improves rigidity and reduces deflection in close-tolerance work. Two spiral flutes with web thinning and a parallel web configuration promote chip evacuation and reduce thrust load. The split point geometry allows the bit to start without center-punching, keeping hole placement accurate on hard or scale-covered surfaces. Licensed HVAC, plumbing, electrical, and mechanical trades rely on this style of bit for repetitive hole production in fabrication and field service environments.\u003c\/p\u003e\n\u003cp\u003eThe 50843 is suited for production drilling and maintenance work on cast iron and steel workpieces. Its screw machine length — 2-13\/16 inches overall with a 1-5\/8 inch flute length — makes it a natural fit for drill press work, turret lathes, screw machine setups, and handheld drilling where stub rigidity is needed. Right-hand cut and straight-cylindrical shank ensure compatibility with standard drill chucks and collet holders used across trades. The Series 559 designation identifies it within CHICAGO-LATROBE's heavy-duty cobalt line, which is manufactured to ISO standards.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eM42 cobalt tool material rated for heavy-duty drilling in cast iron and steel\u003c\/li\u003e\n  \u003cli\u003e135-degree split point starts on contact without center-punching\u003c\/li\u003e\n  \u003cli\u003eWeb-thinned parallel web lowers thrust and extends bit life in hard materials\u003c\/li\u003e\n  \u003cli\u003eScrew machine length (2-13\/16 inches overall) maximizes rigidity and minimizes deflection\u003c\/li\u003e\n  \u003cli\u003eRight-hand cut with straight-cylindrical shank fits standard chucks and collet holders\u003c\/li\u003e\n  \u003cli\u003eDiameter tolerance of +0.0000 to -0.0010 inches supports close-tolerance hole work\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned for use in standard drill chucks and collet holders accepting a straight-cylindrical shank. Primary workpiece materials are cast iron and steel as stated by the manufacturer.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstall the straight-cylindrical shank into a properly sized drill chuck or collet and tighten securely before operation. Use appropriate cutting fluid or coolant when drilling steel to manage heat buildup, as the bit is not coolant-through rated. Secure the workpiece firmly before starting the cut. Observe applicable shop-safety and OSHA requirements for rotating tool operation.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDrill Bit Size (Letter)\u003c\/strong\u003e: N\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDrill Bit Size (Decimal Inch)\u003c\/strong\u003e: 0.302 inches\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\u003eNumber of Flutes\u003c\/strong\u003e: 2\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\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\u003eOverall Length\u003c\/strong\u003e: 2-13\/16 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlute Length\u003c\/strong\u003e: 1-5\/8 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDrill Length Type\u003c\/strong\u003e: Screw Machine\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeb Configuration\u003c\/strong\u003e: Parallel\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeb Thinning\u003c\/strong\u003e: Web-Thinned\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\u003eSeries\u003c\/strong\u003e: 559\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eStandards\u003c\/strong\u003e: ISO\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTool Performance\u003c\/strong\u003e: Heavy-Duty\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: 50843\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"CHICAGO-LATROBE","offers":[{"title":"Default Title","offer_id":51733767487794,"sku":"50843","price":18.91,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/f5d92ffa42f8cc5bf33a2250f5ce0e7b_5f414811-06bd-4508-810e-40e65219c6db.jpg?v=1788759079","url":"https:\/\/voomisupply.com\/products\/chicago-latrobe-50843-screw-machine-drill-bit-0-302-in-cobalt","provider":"Voomi Supply","version":"1.0","type":"link"}