{"product_id":"value-collection-20917-5-21-64-in-hss-mechanics-drill-bit","title":"Value Collection -20917-5 21\/64 in Hss Mechanics Drill Bit","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe VALUE COLLECTION -20917-5 is a mechanics-length high-speed steel drill bit designed for general-purpose metal drilling in trade and industrial applications. It measures 21\/64 inches (0.3281 inches decimal) in diameter with an overall length of 4-1\/16 inches and a flute length of 2-9\/16 inches. The 135-degree split point geometry reduces walking on entry and requires no center punch on most surfaces. The oxide coating provides basic lubricity and surface protection. The Weldon flat shank with three flats resists bit slippage in compatible chuck holders. Right-hand spiral flutes evacuate chips efficiently during through-hole drilling.\u003c\/p\u003e\u003cp\u003eThis drill bit is suited for production drilling, maintenance work, and fabrication tasks where a shorter, more rigid mechanics-length bit is preferred over a jobber-length bit. It is intended for use in drill presses, mag drills, and hand drills equipped with Weldon-style or set-screw chuck holders. Primary workpiece materials include carbon steel, cast iron, high alloy steel, high tensile strength alloy, stainless steel, and steel. The parallel web configuration and web-thinned point reduce thrust requirements and improve cutting performance in harder ferrous materials.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e135-degree split point reduces drill walking and eliminates the need for a center punch on most workpieces\u003c\/li\u003e\n\u003cli\u003eWeldon flat shank with three flats prevents rotational slippage in set-screw chuck holders\u003c\/li\u003e\n\u003cli\u003eMechanics length (4-1\/16 inches OAL) provides increased rigidity compared to jobber-length bits\u003c\/li\u003e\n\u003cli\u003eHigh-speed steel construction handles carbon steel, cast iron, stainless steel, and high alloy steel\u003c\/li\u003e\n\u003cli\u003eWeb-thinned, parallel web configuration lowers thrust force and extends bit life\u003c\/li\u003e\n\u003cli\u003eOxide finish offers basic corrosion and heat resistance during dry drilling\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-style set-screw chuck holders; suitable for drilling carbon steel, cast iron, high alloy steel, high tensile strength alloy, stainless steel, and steel workpieces.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstall and remove this bit only with the drilling machine powered down and the chuck fully secured. Confirm the set-screw chuck is tightened against all three Weldon flats before operation to prevent bit pullout under load. Use appropriate cutting fluid when drilling stainless steel or high alloy steel to manage heat buildup. Follow applicable shop safety standards and wear rated eye protection during all drilling operations.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Bit Size\u003c\/strong\u003e: 21\/64 inches (0.3281 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\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\u003eWeb Configuration\u003c\/strong\u003e: Parallel, Web-Thinned\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating\/Finish\u003c\/strong\u003e: Oxide\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 4-1\/16 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlute Length\u003c\/strong\u003e: 2-9\/16 inches\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\u003c\/ul\u003e\u003ch4\u003eStandard Information\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: VALUE COLLECTION\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: -20917-5\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"VALUE COLLECTION","offers":[{"title":"Default Title","offer_id":51701533344050,"sku":"-20917-5","price":82.14,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/b5c5295d1c279f37b894a22180b89403.jpg?v=1788400799","url":"https:\/\/voomisupply.com\/products\/value-collection-20917-5-21-64-in-hss-mechanics-drill-bit","provider":"Voomi Supply","version":"1.0","type":"link"}