{"product_id":"widia-4143962-screw-machine-drill-bit-letter-e-1-4-in","title":"Widia 4143962 Screw Machine Drill Bit Letter E 1\/4 in","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe WIDIA 4143962 is a screw machine length drill bit in the VDS201A series, sized at letter E (0.2500 inches, or 1\/4 inch). It features a titanium aluminum nitride (TiAlN) coating over a straight-cylindrical shank and a two-flute spiral design with web thinning at the tip. The shorter screw machine length body delivers improved rigidity compared to jobber-length bits, making it well suited for high-production drilling in tight-clearance setups. This bit is designed for right-hand cutting and is installed by machinists, tool-and-die professionals, and maintenance technicians working with precision drilling equipment.\u003c\/p\u003e\n\u003cp\u003eThis drill bit is intended for general-purpose drilling in a range of materials including steel, stainless steel, cast iron, non-ferrous metals, superalloys, and titanium. The TiAlN coating extends tool life in higher-heat applications such as dry or semi-dry drilling. The screw machine length format fits standard drill chucks and CNC drilling setups where stub-length tooling is preferred for reduced deflection and improved hole accuracy.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eLetter E size  -  0.2500 inches (1\/4 inch) cutting diameter\u003c\/li\u003e\n  \u003cli\u003eTiAlN coating for extended tool life in ferrous and high-temp materials\u003c\/li\u003e\n  \u003cli\u003eWeb-thinned point reduces thrust force and improves self-centering\u003c\/li\u003e\n  \u003cli\u003eTwo-flute spiral design with regular helix for efficient chip evacuation\u003c\/li\u003e\n  \u003cli\u003eStraight-cylindrical shank at 0.3150 inches diameter fits standard drill chucks\u003c\/li\u003e\n  \u003cli\u003eMaximum drilling depth of 0.9449 inches (3xD flute-to-diameter ratio)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as a general-purpose screw machine length drill bit for use in standard drill chucks, CNC machining centers, and drill presses configured for stub-length tooling. Part of the WIDIA VDS201A series.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eMachinists and tooling technicians should ensure the machine spindle is fully stopped and the chuck is relieved of pressure before inserting or removing this bit. Confirm chuck capacity accommodates a 0.3150-inch shank diameter before installation. For best results in high-hardness materials, verify appropriate feed rates and spindle speeds for TiAlN-coated tooling per the machine manufacturer guidelines. This bit does not support coolant-through delivery; use external coolant or cutting fluid application as needed.\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: E\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDrill Bit Size (Decimal Inch)\u003c\/strong\u003e: 0.2500 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 3-7\/64 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlute Length\u003c\/strong\u003e: 1.3386 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Length\u003c\/strong\u003e: 1.4173 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 0.3150 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Type\u003c\/strong\u003e: Straight-Cylindrical\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaximum Drilling Depth\u003c\/strong\u003e: 0.9449 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDrill Point Length\u003c\/strong\u003e: 0.0421 inches\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\u003eFlute Type\u003c\/strong\u003e: Spiral\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePoint Type\u003c\/strong\u003e: Thinned\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeb Thinning\u003c\/strong\u003e: Web-Thinned\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCutting Direction\u003c\/strong\u003e: Right Hand\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoating\u003c\/strong\u003e: TiAlN\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoolant Through\u003c\/strong\u003e: No\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDrill Length Type\u003c\/strong\u003e: Screw Machine\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlute by Diameter Ratio\u003c\/strong\u003e: 3xD\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTool Performance\u003c\/strong\u003e: General Purpose\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePrimary Workpiece Material\u003c\/strong\u003e: Steel, Stainless Steel, Cast Iron, Non-Ferrous Metal, Superalloys and Titanium\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDrill Bit Diameter Tolerance\u003c\/strong\u003e: -0.0006 to 0.0000 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: VDS201A\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.087 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: WIDIA\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 4143962\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"WIDIA","offers":[{"title":"Default Title","offer_id":67908378526002,"sku":"4143962","price":105.14,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/6a483ff522be49333f85cd2dfc33d9da.jpg?v=1791183355","url":"https:\/\/voomisupply.com\/products\/widia-4143962-screw-machine-drill-bit-letter-e-1-4-in","provider":"Voomi Supply","version":"1.0","type":"link"}