{"product_id":"import-bdna-20928-1-mechanics-drill-bit-1-2-in-hss","title":"Import BDNA--20928-1 Mechanics Drill Bit 1\/2 in Hss","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe IMPORT BDNA--20928-1 is a mechanics-length drill bit designed for drilling into ferrous and high-strength materials in professional trade and industrial applications. The bit measures 0.5 inches in diameter with a 5-inch overall length and a 3-3\/8-inch flute length, making it compact enough for tight-clearance work without sacrificing rigidity. Constructed from high-speed steel with an oxide finish, it features a 135-degree split point that reduces walking on entry and allows drilling without a center punch. The Weldon flat shank with three flats provides positive drive and resists slipping in compatible chucks and holders.\u003c\/p\u003e\n\u003cp\u003eThis bit is suited for drilling carbon steel, cast iron, high alloy steel, high tensile strength alloys, and stainless steel. It is a general-purpose mechanics-length bit appropriate for machinists, maintenance technicians, pipefitters, and fabricators who need a shorter, stiffer bit profile for controlled drilling in structural and mechanical work. The right-hand spiral flute with parallel web configuration and web-thinned tip improves chip evacuation and reduces thrust load during drilling. Coolant-through capability is not included in this design.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e135-degree split point reduces bit walking and eliminates need for center punching on flat surfaces\u003c\/li\u003e\n  \u003cli\u003eHigh-speed steel construction provides heat resistance for drilling ferrous metals and alloys\u003c\/li\u003e\n  \u003cli\u003eOxide finish improves lubricity and surface hardness for extended tool life\u003c\/li\u003e\n  \u003cli\u003eWeldon flat shank with three flats locks positively in chuck or holder to prevent slipping under torque\u003c\/li\u003e\n  \u003cli\u003eWeb-thinned tip reduces cutting resistance and required thrust force\u003c\/li\u003e\n  \u003cli\u003eMechanics length at 5 inches overall provides added rigidity compared to jobber-length bits\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eCompatible with drill presses, magnetic drills, and hand drills equipped with Weldon-style chucks or tool holders accepting a 1\/2-inch Weldon flat shank. Designed for general-purpose drilling in carbon steel, cast iron, high alloy steel, high tensile strength alloys, and stainless steel workpieces.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation and use should follow standard machine shop and metalworking safety practices. Ensure the Weldon flat shank is fully seated and all set screws in the holder are tightened before use. Disconnect or lock out power to drill equipment before changing bits. Use appropriate cutting fluid or lubricant when drilling stainless steel or high-alloy materials to manage heat buildup and extend bit life.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDrill Bit Diameter\u003c\/strong\u003e: 0.5 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 5 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlute Length\u003c\/strong\u003e: 3-3\/8 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 Point\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Type\u003c\/strong\u003e: Weldon Flat, 3 Flats\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCutting Direction\u003c\/strong\u003e: Right Hand\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\u003eFlute Type\u003c\/strong\u003e: Spiral, Regular\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\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.01 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: IMPORT\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: BDNA--20928-1\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"IMPORT-GENERIC","offers":[{"title":"Default Title","offer_id":51717523472690,"sku":"BDNA--20928-1","price":33.85,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/9bae3071bd4b99c7db90fd401d80f66d.jpg?v=1788541959","url":"https:\/\/voomisupply.com\/products\/import-bdna-20928-1-mechanics-drill-bit-1-2-in-hss","provider":"Voomi Supply","version":"1.0","type":"link"}