{"product_id":"hertel-77428670-reduced-shank-drill-bit-41-64-in-hss","title":"Hertel 77428670 Reduced Shank Drill Bit 41\/64 in Hss","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe HERTEL 77428670 is a reduced shank twist drill bit ground from high-speed steel and finished with a black oxide coating. The cutting diameter measures 41\/64 inches (0.6406 inches decimal), while the Weldon flat shank reduces to 1\/2 inch to fit standard chucks and toolholders without requiring a larger spindle bore. The 118-degree standard point angle suits general-purpose drilling in a wide range of ferrous and non-ferrous workpiece materials. Overall length is 6 inches with a 3-inch spiral flute length, and the right-hand cut spiral flutes evacuate chips efficiently during through-hole and blind-hole operations. Weight is 0.4 pounds.\u003c\/p\u003e\u003cp\u003eThis drill bit is intended for use in machine shop, maintenance, and production drilling applications where a full-shank bit would exceed the toolholder capacity. It is well suited for drill presses, milling machines, and CNC machining centers equipped with 1\/2-inch Weldon-style holders. Primary workpiece materials include low and medium tensile strength steels, cast iron, aluminum, and similar materials. The 3-inch flute length supports drilling depths up to 3 inches per the manufacturer specification, making it practical for moderate-depth hole-making in plate, structural, and fabricated components.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e41\/64 inch cutting diameter (0.6406 inches decimal) with a reduced 1\/2 inch Weldon flat shank for broad toolholder compatibility\u003c\/li\u003e\n\u003cli\u003eHigh-speed steel construction provides hardness and wear resistance for general-purpose metal drilling\u003c\/li\u003e\n\u003cli\u003eBlack oxide finish reduces friction and provides light corrosion resistance during storage and use\u003c\/li\u003e\n\u003cli\u003e118-degree standard point angle for self-centering entry on flat and slightly curved surfaces\u003c\/li\u003e\n\u003cli\u003eThree-flat Weldon shank design resists rotational slippage in the holder under torque\u003c\/li\u003e\n\u003cli\u003eRight-hand spiral flutes promote chip ejection and reduce heat buildup during drilling\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as a direct-fit reduced shank drill bit for 1\/2 inch Weldon-style toolholders and end-mill holders used on drill presses, knee mills, and CNC machining centers. Suitable for drilling low and medium tensile strength materials.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation and use should be performed by a qualified machinist or tool-and-die professional. Secure the Weldon flat against the set screw in the toolholder before applying power; ensure the set screw contacts the flat directly to prevent shank rotation. Verify spindle speed is appropriate for the workpiece material and hole diameter before drilling. Inspect the cutting edges for wear or chipping before each use, and replace the bit if edge condition has degraded to avoid workpiece damage or toolholder stress.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Bit Size\u003c\/strong\u003e: 41\/64 inches (0.6406 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 1\/2 inch\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\u003eOverall Length\u003c\/strong\u003e: 6 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlute Length\u003c\/strong\u003e: 3 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum Drilling Depth\u003c\/strong\u003e: 3 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Point Angle\u003c\/strong\u003e: 118 degrees\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePoint Type\u003c\/strong\u003e: Standard\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlute Type\u003c\/strong\u003e: Spiral\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpiral Type\u003c\/strong\u003e: Regular\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\u003ePrimary Workpiece Material\u003c\/strong\u003e: Low and Medium Tensile Strength Materials\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoolant\u003c\/strong\u003e: No\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.4 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUNSPSC Code\u003c\/strong\u003e: 23241635\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eStandard Information\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: HERTEL\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 77428670\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"HERTEL","offers":[{"title":"Default Title","offer_id":51743347671346,"sku":"77428670","price":72.22,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/b357949460df48e5f4acf4af7b2616e0.jpg?v=1788845957","url":"https:\/\/voomisupply.com\/products\/hertel-77428670-reduced-shank-drill-bit-41-64-in-hss","provider":"Voomi Supply","version":"1.0","type":"link"}