{"product_id":"hertel-74130402-29-64-in-cobalt-screw-machine-drill-bit","title":"Hertel 74130402 29\/64 in Cobalt Screw Machine Drill Bit","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe HERTEL 74130402 is a screw machine length drill bit designed for high-productivity drilling in metal and hard materials. Built from cobalt high-speed steel (HSCO), it handles elevated cutting temperatures better than standard HSS bits, making it well-suited for stainless steel, cast iron, titanium, and other tough alloys. The 135-degree split point geometry starts on contact without a center punch, reducing walking and improving hole location accuracy. At 3.5625 inches overall length, the shortened flute design provides greater rigidity and reduces deflection in production drilling applications. Web thinning lowers thrust requirements and improves chip evacuation.\u003c\/p\u003e\n\u003cp\u003eThis bit is used in screw machine work, CNC machining centers, drill presses, and hand-held drilling operations where hole accuracy and tool life under heat are priorities. The straight cylindrical shank accommodates standard drill chucks and collet holders across common machine platforms. It is a standard choice in metalworking shops, maintenance and repair operations, and industrial fabrication environments where stainless, alloy steel, or hardened materials are regularly drilled.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eCobalt (HSCO) construction for extended tool life in hard and abrasive metals\u003c\/li\u003e\n  \u003cli\u003e135-degree split point starts on contact, no center punch required\u003c\/li\u003e\n  \u003cli\u003eWeb-thinned parallel web reduces cutting thrust and improves chip flow\u003c\/li\u003e\n  \u003cli\u003eScrew machine length body provides rigidity and reduces deflection\u003c\/li\u003e\n  \u003cli\u003eRight-hand regular spiral flute for standard drilling applications\u003c\/li\u003e\n  \u003cli\u003eStraight cylindrical shank fits standard drill chucks and collet systems\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as an OEM-style replacement or direct-use screw machine drill bit for metalworking applications requiring a 29\/64 inch diameter hole in the 0.4500 to 0.5000 inch decimal size range.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation is performed by machinists or maintenance technicians familiar with metal cutting operations. Secure the shank fully in the drill chuck or collet before operating, and verify runout before production drilling. Use appropriate cutting fluid or coolant for the workpiece material to extend tool life, noting this bit does not support coolant-through delivery. Follow applicable shop safety practices including guarding and eye protection when operating drilling equipment.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDrill Bit Size\u003c\/strong\u003e: 29\/64 inches (0.4531 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 3.5625 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlute Length\u003c\/strong\u003e: 2.125 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\u003eTool Material\u003c\/strong\u003e: Cobalt (HSCO)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoating\/Finish\u003c\/strong\u003e: Straw\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNumber of Flutes\u003c\/strong\u003e: 2\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlute Type\u003c\/strong\u003e: Regular Spiral\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSpiral Type\u003c\/strong\u003e: Regular\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Type\u003c\/strong\u003e: Straight Cylindrical\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCutting Direction\u003c\/strong\u003e: Right Hand\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\u003eSeries\u003c\/strong\u003e: HSCO135\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDrill Bit Size Range\u003c\/strong\u003e: 0.4500 to 0.5000 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUNSPSC Code\u003c\/strong\u003e: 23241635\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.72 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: HERTEL\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 74130402\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"HERTEL","offers":[{"title":"Default Title","offer_id":51750515310898,"sku":"74130402","price":25.76,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/aad8654b926834aa1310d6ba70b3b9f9.jpg?v=1788916062","url":"https:\/\/voomisupply.com\/products\/hertel-74130402-29-64-in-cobalt-screw-machine-drill-bit","provider":"Voomi Supply","version":"1.0","type":"link"}