{"product_id":"widia-4143938-screw-machine-drill-bit-3-16-in-tialn","title":"Widia 4143938 Screw Machine Drill Bit 3\/16 in Tialn","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe WIDIA 4143938 is a screw machine length drill bit designed for high-productivity hole-making in a wide range of metalworking applications. Built to Series VDS201A specifications, it carries a TiAlN coating that extends tool life under elevated cutting temperatures. The bit measures 3\/16 inch (0.1875 inches) in diameter with an overall length of 2.6 inches and a flute length of 1.1 inches. A thinned, web-thinned point reduces entry thrust and improves centering accuracy. The straight-cylindrical shank at 0.2362 inches diameter seats securely in standard drill chucks and collet holders. This is a right-hand, two-flute spiral design rated for general purpose use.\u003c\/p\u003e\u003cp\u003eThis drill bit is suited for production and maintenance machining environments where screw machine length geometry is required for rigidity in short-reach drilling. Primary workpiece materials include steel, stainless steel, cast iron, non-ferrous metals, superalloys, and titanium. The 3xD flute-to-diameter ratio and maximum drilling depth of 0.79 inches make it a practical choice for through-holes and blind holes in tight-tolerance work. It is installed by machinists and tool-and-die professionals working on CNC machining centers, drill presses, and screw machines in both job shop and production line settings.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eTiAlN coating for improved heat resistance and extended tool life in ferrous and high-temperature alloys\u003c\/li\u003e\n\u003cli\u003eWeb-thinned point reduces thrust force and improves self-centering on entry\u003c\/li\u003e\n\u003cli\u003eScrew machine length geometry provides added rigidity compared to jobber length bits\u003c\/li\u003e\n\u003cli\u003eTwo-flute spiral design promotes efficient chip evacuation\u003c\/li\u003e\n\u003cli\u003eStraight-cylindrical shank compatible with standard drill chucks and collet systems\u003c\/li\u003e\n\u003cli\u003eRight-hand cutting direction for use in standard clockwise-rotation spindles\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as a general-purpose replacement or production drill bit for use in applications requiring 3\/16 inch diameter screw machine length geometry, compatible with workpieces in steel, stainless steel, cast iron, non-ferrous metals, superalloys, and titanium as stated by the manufacturer.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eThis bit is installed by machinists in drill chucks or collet holders rated for its 0.2362-inch shank diameter. Always ensure the machine spindle is fully stopped and locked out before changing tooling. Verify chuck or collet runout is within tolerance before drilling to maintain the stated diameter tolerance of -0.0005 to 0.0000 inches. Use appropriate cutting fluid or coolant for the workpiece material, noting this bit does not feature through-coolant capability.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: VDS201A\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Bit Diameter\u003c\/strong\u003e: 3\/16 inches (0.1875 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 2.6 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlute Length\u003c\/strong\u003e: 1.1 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Length\u003c\/strong\u003e: 1.42 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 0.2362 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum Drilling Depth\u003c\/strong\u003e: 0.79 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Point Length\u003c\/strong\u003e: 0.031 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\u003eFlute by Diameter Ratio\u003c\/strong\u003e: 3xD\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting Direction\u003c\/strong\u003e: Right Hand\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\u003eShank Type\u003c\/strong\u003e: Straight-Cylindrical\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating\u003c\/strong\u003e: TiAlN\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Length Type\u003c\/strong\u003e: Screw Machine\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoolant Through\u003c\/strong\u003e: No\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDiameter Tolerance\u003c\/strong\u003e: -0.0005 to 0.0000 inches\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\u003eTool Performance\u003c\/strong\u003e: General Purpose\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.053 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUNSPSC Code\u003c\/strong\u003e: 23241635\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eStandard Information\u003c\/h4\u003e\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: 4143938\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"WIDIA","offers":[{"title":"Default Title","offer_id":67916737741106,"sku":"4143938","price":100.6,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/047674e7ba4b460de7d97eb2ec49d6f4.jpg?v=1791259052","url":"https:\/\/voomisupply.com\/products\/widia-4143938-screw-machine-drill-bit-3-16-in-tialn","provider":"Voomi Supply","version":"1.0","type":"link"}