{"product_id":"import-bdna-20921-1-mechanics-drill-bit-25-64-in-hss","title":"Import BDNA--20921-1 Mechanics Drill Bit 25\/64 in Hss","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe IMPORT BDNA--20921-1 is a mechanics-length twist drill bit designed for general-purpose metal drilling in production and maintenance environments. Built from high-speed steel with an oxide finish, it measures 25\/64 inches (0.3906 inches decimal) in diameter with a 135-degree split point that self-centers on contact and reduces walking without a center punch. Overall length is 4-5\/16 inches with a 2-3\/4 inch flute length. The Weldon flat shank with three flats locks securely in chuck collets to prevent rotation under load. Right-hand spiral flutes evacuate chips efficiently during through-hole and blind-hole operations.\u003c\/p\u003e\u003cp\u003eThis drill bit is suited for drilling carbon steel, cast iron, high alloy steel, high tensile strength alloys, stainless steel, and general steel stock. The mechanics-length body provides added rigidity over jobber-length bits, making it well-suited for close-tolerance work in tight spaces on machine beds, fixtures, and structural assemblies. It is appropriate for use in drill presses, milling machines, and hand-held power tools equipped with compatible Weldon flat chuck systems. General-purpose tool performance makes it a practical stock item for fabrication shops, maintenance facilities, and field service kits.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e25\/64 inch diameter (0.3906 inches decimal) for precise hole sizing\u003c\/li\u003e\n\u003cli\u003e135-degree split point self-centers and reduces thrust force on entry\u003c\/li\u003e\n\u003cli\u003eHigh-speed steel construction handles steel, cast iron, and stainless steel workpieces\u003c\/li\u003e\n\u003cli\u003eWeldon flat shank with three flats prevents rotation slip in driven chucks\u003c\/li\u003e\n\u003cli\u003eWeb-thinned parallel web reduces cutting resistance and improves chip clearance\u003c\/li\u003e\n\u003cli\u003eOxide finish provides mild corrosion resistance and reduces friction during cutting\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as a general-purpose mechanics-length drill bit compatible with Weldon flat chuck systems and drill presses or power tools that accept a 25\/64 inch Weldon shank. Suitable for workpieces in carbon steel, cast iron, high alloy steel, high tensile strength alloy, stainless steel, and general steel.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation and use should be performed by a qualified machinist or trained tradesperson familiar with rotary cutting tools. Secure the Weldon flat shank fully in the chuck and verify all set screws are tightened against the flats before operating. Wear appropriate eye protection and ensure the workpiece is clamped or fixtured before drilling. Do not exceed the recommended feed and speed range for the workpiece material, and allow the bit to cool or apply cutting fluid when drilling hard alloys or stainless steel to preserve tool life.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Bit Size\u003c\/strong\u003e: 25\/64 inches (0.3906 inches decimal)\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 Point\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTool Material\u003c\/strong\u003e: High-Speed Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating\/Finish\u003c\/strong\u003e: Oxide\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\u003eDrill Length Type\u003c\/strong\u003e: Mechanics\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 4-5\/16 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlute Length\u003c\/strong\u003e: 2-3\/4 inches\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\u003ePrimary Workpiece Materials\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\u003cli\u003e\n\u003cstrong\u003ePackage Quantity\u003c\/strong\u003e: 1\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--20921-1\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"IMPORT-GENERIC","offers":[{"title":"Default Title","offer_id":51707639365938,"sku":"BDNA--20921-1","price":32.68,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/1fc19332e0fdf3657ebfd054d79f711e.jpg?v=1788441369","url":"https:\/\/voomisupply.com\/products\/import-bdna-20921-1-mechanics-drill-bit-25-64-in-hss","provider":"Voomi Supply","version":"1.0","type":"link"}