{"product_id":"import-bdna-20916-1-5-16-inch-mechanics-drill-bit-hss","title":"Import BDNA--20916-1 5\/16 Inch Mechanics Drill Bit Hss","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe IMPORT BDNA--20916-1 is a 5\/16-inch mechanics-length drill bit built for demanding metalworking applications. It is manufactured from high-speed steel with an oxide finish and features a 135-degree split point that reduces walking and requires no center punch on most materials. The Weldon flat shank with three flats locks securely in chuck holders to prevent slipping under torque. Web thinning improves cutting efficiency and reduces the thrust required to penetrate hard stock. This bit is suited for use by machinists, HVAC technicians, plumbers, and electricians who drill through metal framing, enclosures, or structural components in the field or shop.\u003c\/p\u003e\u003cp\u003eThis mechanics-length drill bit is designed for general-purpose drilling in carbon steel, cast iron, high alloy steel, high tensile strength alloy, stainless steel, and similar ferrous metals. The shorter mechanics length provides added rigidity compared to jobber-length bits, making it well suited for tight-clearance drilling in equipment rooms, panel boxes, and mechanical chases where a longer bit would flex or deflect. The right-hand spiral flute evacuates chips efficiently during through-hole operations.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e135-degree split point reduces bit walking and eliminates the need for a center punch on most metal surfaces\u003c\/li\u003e\n\u003cli\u003eHigh-speed steel construction withstands the heat generated when drilling ferrous metals\u003c\/li\u003e\n\u003cli\u003eOxide finish provides mild lubricity and corrosion resistance during storage and use\u003c\/li\u003e\n\u003cli\u003eWeldon flat shank with three flats prevents rotation in compatible chuck holders\u003c\/li\u003e\n\u003cli\u003eWeb-thinned parallel web reduces drilling thrust and improves chip clearance\u003c\/li\u003e\n\u003cli\u003eMechanics length (4 inches overall) provides greater rigidity than jobber-length equivalents\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as a general-purpose replacement or supplemental mechanics drill bit compatible with 3-flat Weldon shank chuck holders and suitable for drilling carbon steel, cast iron, high alloy steel, stainless steel, and high tensile strength alloy workpieces.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation is performed by machinists and trade professionals using a drill press, magnetic drill, or handheld drill with a compatible Weldon flat chuck. Secure the three-flat shank fully in the chuck before beginning to drill to prevent slippage. Always wear appropriate eye protection and secure the workpiece before drilling. Do not exceed the recommended RPM range for the workpiece material and bit diameter.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Bit Size\u003c\/strong\u003e: 5\/16 inches (0.3125 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\u003eTool Material\u003c\/strong\u003e: High-Speed Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Type\u003c\/strong\u003e: Weldon Flat\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Flats\u003c\/strong\u003e: 3\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting Direction\u003c\/strong\u003e: Right Hand\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlute Type\u003c\/strong\u003e: Spiral (Regular)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 4 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlute Length\u003c\/strong\u003e: 2.5 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating\/Finish\u003c\/strong\u003e: Oxide\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\u003eCoolant Through\u003c\/strong\u003e: No\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrimary Workpiece Material\u003c\/strong\u003e: Carbon Steel, Cast Iron, High Alloy Steel, High Tensile Strength Alloy, Stainless Steel, Steel\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: 0.01 pounds\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eStandard Information\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: IMPORT\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: BDNA--20916-1\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"IMPORT-GENERIC","offers":[{"title":"Default Title","offer_id":51694106575154,"sku":"BDNA--20916-1","price":18.18,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/680d41a7cb2bee86df794bcfd67e2330.jpg?v=1788320317","url":"https:\/\/voomisupply.com\/products\/import-bdna-20916-1-5-16-inch-mechanics-drill-bit-hss","provider":"Voomi Supply","version":"1.0","type":"link"}