{"product_id":"cleveland-c14284-screw-machine-drill-bit-letter-d-cobalt","title":"Cleveland C14284 Screw Machine Drill Bit Letter D Cobalt","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe CLEVELAND C14284 is a screw machine length cobalt drill bit sized to Letter D (0.2460 inches) and built for heavy-duty drilling in tough materials. It features a 135-degree split point that reduces walking on contact and cuts through workpieces with less feed pressure than a conventional 118-degree point. The parabolic flute geometry improves chip evacuation during deep-hole drilling. At 2.5 inches overall length, the screw machine (stub) length format provides added rigidity over jobber-length bits, making it well-suited for CNC machining centers, drill presses, and turret lathes where chatter control matters.\u003c\/p\u003e\n\u003cp\u003eThis bit is designed for drilling alloy steels and aluminum in production machining environments. The straight-cylindrical shank at 0.2460 inches diameter fits standard drill chucks and collet systems without modification. The cobalt (M42) construction retains hardness at elevated cutting temperatures, which makes it a practical choice for interrupted cuts, harder alloys, and high-cycle production runs where high-speed steel tooling falls short. It is typically installed by machinists, tool-and-die workers, and maintenance technicians working to ASME B94.11M standards.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eLetter D size (0.2460 inches) with diameter tolerance of +0.0000 to -0.0007 inches\u003c\/li\u003e\n  \u003cli\u003eM42 cobalt construction for heat resistance in heavy-duty cutting applications\u003c\/li\u003e\n  \u003cli\u003e135-degree split point reduces thrust and self-centers on entry\u003c\/li\u003e\n  \u003cli\u003eParabolic flute profile with web thinning for improved chip flow and reduced torque\u003c\/li\u003e\n  \u003cli\u003eScrew machine (stub) length at 2.5 inches overall provides rigidity in tight setups\u003c\/li\u003e\n  \u003cli\u003eRight-hand cut, straight-cylindrical shank compatible with standard chucks and collets\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as an OEM-style replacement and standard production tooling option for drill presses, CNC machining centers, and turret lathes accepting a 0.2460-inch straight-cylindrical shank bit in the screw machine length format. Primary workpiece materials include alloy steel and aluminum per supplier specification.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eA licensed machinist or qualified technician should ensure the machine spindle is fully stopped and the chuck is secure before seating or removing the bit. Verify chuck or collet capacity matches the 0.2460-inch shank diameter before tightening. Use appropriate cutting fluid for the workpiece material to extend tool life and maintain dimensional accuracy. Follow ASME B94.11M guidelines for drill bit handling and storage to prevent edge damage.\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: D\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDrill Bit Size (Decimal Inch)\u003c\/strong\u003e: 0.2460 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 2.5 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlute Length\u003c\/strong\u003e: 1.375 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Length\u003c\/strong\u003e: 1.125 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 0.2460 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\u003eFlute Type\u003c\/strong\u003e: Parabolic\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNumber of Flutes\u003c\/strong\u003e: 2\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTool Material\u003c\/strong\u003e: Cobalt (M42)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDrill Bit Grade\u003c\/strong\u003e: Heavy Duty\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\u003eCoolant Through\u003c\/strong\u003e: No\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDrill Bit Diameter Tolerance\u003c\/strong\u003e: +0.0000 to -0.0007 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePrimary Workpiece Material\u003c\/strong\u003e: Alloy Steel, Aluminum\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: 2175\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eStandard\u003c\/strong\u003e: ASME B94.11M\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSpecification Designation\u003c\/strong\u003e: ANSI\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.6 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: CLEVELAND\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: C14284\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"CLEVELAND CONTROLS","offers":[{"title":"Default Title","offer_id":51692780355890,"sku":"C14284","price":28.27,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/b5392c1cf7862fc998fb4cc49a327ae9.jpg?v=1788302791","url":"https:\/\/voomisupply.com\/products\/cleveland-c14284-screw-machine-drill-bit-letter-d-cobalt","provider":"Voomi Supply","version":"1.0","type":"link"}