{"product_id":"hertel-66691221-cobalt-screw-machine-drill-bit-5-64-in","title":"Hertel 66691221 Cobalt Screw Machine Drill Bit 5\/64 in","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe HERTEL 66691221 is a cobalt screw machine length drill bit designed for high-speed, short-reach drilling in metal and hard materials. At 5\/64 inches (0.0781 inches) in diameter with a 135-degree split point, it starts on center without a pilot hole and reduces walking on hard surfaces. The TiN (titanium nitride) coating extends tool life by increasing surface hardness and reducing friction. With an overall length of 1-11\/16 inches and a flute length of 11\/16 inches, this stub-length bit provides increased rigidity compared to jobber-length alternatives. It is installed and used by machinists, HVAC technicians, plumbers, and electricians who drill in tight or confined spaces requiring precise, controlled entry.\u003c\/p\u003e\n\u003cp\u003eThis bit is suited for screw machine operations, CNC setups, and hand-held drilling applications where stub length reduces deflection. The straight cylindrical shank fits standard drill chucks. The heavy-duty grade cobalt construction handles stainless steel, hardened alloys, cast iron, and other tough materials that standard high-speed steel bits cannot reliably penetrate. The right-hand spiral flute evacuates chips efficiently during drilling operations.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eCobalt construction rated heavy duty for drilling stainless steel and hardened alloys\u003c\/li\u003e\n  \u003cli\u003eTiN coating increases surface hardness and extends cutting life\u003c\/li\u003e\n  \u003cli\u003e135-degree split point starts on center and reduces thrust force required\u003c\/li\u003e\n  \u003cli\u003eScrew machine (stub) length at 1-11\/16 inches OAL provides maximum rigidity and minimal deflection\u003c\/li\u003e\n  \u003cli\u003eWeb-thinned parallel web design reduces cutting resistance\u003c\/li\u003e\n  \u003cli\u003eRight-hand spiral flute for efficient chip evacuation\u003c\/li\u003e\n  \u003cli\u003eStraight cylindrical shank fits standard drill chucks without adapters\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as a direct-fit stub-length drill bit for standard drill chucks accepting a 0.0781-inch straight cylindrical shank, compatible with hand drills, drill presses, and CNC drilling equipment.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstall the shank fully into the chuck and tighten securely before use. Ensure the workpiece is clamped or fixtured to prevent movement during drilling. Apply cutting fluid or lubricant when drilling stainless steel or hardened alloys to manage heat buildup and extend bit life. Do not exceed the recommended RPM range for the bit diameter and material being drilled.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDrill Bit Size\u003c\/strong\u003e: 5\/64 inches (0.0781 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 1-11\/16 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlute Length\u003c\/strong\u003e: 11\/16 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 0.0781 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\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTool Material\u003c\/strong\u003e: Cobalt\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoating\/Finish\u003c\/strong\u003e: TiN (Titanium Nitride)\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\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\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\u003eDrill Bit Grade\u003c\/strong\u003e: Heavy Duty\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.1 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: 66691221\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"HERTEL","offers":[{"title":"Default Title","offer_id":51739901034802,"sku":"66691221","price":38.44,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/9f0ae636991d1e81e43db1ac8ec70501.jpg?v=1788820212","url":"https:\/\/voomisupply.com\/products\/hertel-66691221-cobalt-screw-machine-drill-bit-5-64-in","provider":"Voomi Supply","version":"1.0","type":"link"}