{"product_id":"chicago-latrobe-53921-7-16-inch-hss-tin-drill-bit","title":"Chicago-latrobe 53921 7\/16 Inch Hss Tin Drill Bit","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe CHICAGO-LATROBE 53921 is a heavy-duty jobber length drill bit designed for production drilling in steel alloy and similar ferrous materials. Built from high speed steel with a titanium nitride (TiN) coating, it delivers extended tool life compared to uncoated HSS bits. The 135-degree split point starts on contact without a center punch and reduces walking on flat surfaces. The parabolic flute geometry improves chip evacuation, which matters most when drilling deeper holes or gummy materials. At 5.5 inches overall length with a 4.0625-inch flute, this bit fits standard drill chucks and magnetic drill presses used in HVAC, plumbing, and mechanical trades.\u003c\/p\u003e\u003cp\u003eThis bit is suited for drilling steel alloy in fabrication, layout, and field service applications. Typical use cases include drilling sheet metal framing, structural steel, equipment mounting plates, and pipe hangers. The straight cylindrical shank seats securely in 3-jaw chucks and compatible quick-change holders. The web-thinned, tapered web design reduces thrust requirements at depth, making it practical for handheld drilling operations where feed pressure must be controlled manually.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e135-degree split point starts on contact, no center punch required\u003c\/li\u003e\n\u003cli\u003eTiN coating extends tool life and reduces heat buildup at the cutting edge\u003c\/li\u003e\n\u003cli\u003eParabolic flute design accelerates chip evacuation in deep-hole drilling\u003c\/li\u003e\n\u003cli\u003eWeb-thinned tapered web reduces axial thrust, easing handheld use\u003c\/li\u003e\n\u003cli\u003eStraight cylindrical shank fits standard 3-jaw chucks and quick-change systems\u003c\/li\u003e\n\u003cli\u003eHeavy-duty grade construction rated for steel alloy primary workpiece material\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-style jobber length drill bit for use in standard drill chucks and compatible quick-change holding systems accepting a 0.4375-inch straight cylindrical shank.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation and use should be performed by qualified tradespeople familiar with metal drilling operations. Always secure the workpiece before drilling and confirm the chuck is fully tightened before applying power. Use appropriate cutting fluid or lubricant when drilling steel alloy to manage heat and extend bit life. Inspect the cutting edges for wear before each use and replace the bit if the TiN coating is worn through at the tip.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Bit Size\u003c\/strong\u003e: 7\/16 inches (0.4375 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\u003eCutting Direction\u003c\/strong\u003e: Right Hand\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 5.5 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlute Length\u003c\/strong\u003e: 4.0625 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 0.4375 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Length\u003c\/strong\u003e: 1.4375 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Type\u003c\/strong\u003e: Straight-Cylindrical\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Bit Material\u003c\/strong\u003e: High Speed Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinish\/Coating\u003c\/strong\u003e: Titanium Nitride (TiN)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeb Configuration\u003c\/strong\u003e: Tapered, Web-Thinned\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDiameter Tolerance\u003c\/strong\u003e: -0.0010 to 0.0000 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrimary Workpiece Material\u003c\/strong\u003e: Steel Alloy\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoolant Through\u003c\/strong\u003e: No\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGrade\u003c\/strong\u003e: Heavy Duty\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: 150DHT\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: 53921\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"CHICAGO-LATROBE","offers":[{"title":"Default Title","offer_id":51735153279282,"sku":"53921","price":38.52,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/996c55e08b1b89edfcfe08c60ec7215b.jpg?v=1788769915","url":"https:\/\/voomisupply.com\/products\/chicago-latrobe-53921-7-16-inch-hss-tin-drill-bit","provider":"Voomi Supply","version":"1.0","type":"link"}