{"product_id":"hertel-66693466-screw-machine-drill-bit-letter-i-tin-hss","title":"Hertel 66693466 Screw Machine Drill Bit Letter I Tin Hss","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe HERTEL 66693466 is a screw machine length drill bit designed for high-production drilling in metal fabrication and machining environments. Sized at Letter I (0.2720 inches), it features a 135-degree split point that reduces walking on entry and lowers thrust requirements compared to conventional 118-degree points. The bit is manufactured from high-speed steel with a titanium nitride (TiN) coating that extends tool life by reducing friction and heat buildup at the cutting edge. At 2-11\/16 inches overall length, screw machine length geometry provides added rigidity over jobber-length bits, making it well suited to drill press, CNC turret, and screw machine applications where chatter and deflection must be minimized.\u003c\/p\u003e\n\u003cp\u003eThis drill bit is used in light to heavy-duty metal cutting operations including ferrous and non-ferrous stock. The straight-cylindrical shank seats securely in standard three-jaw drill chucks and collet-style toolholders without requiring a morse taper adapter. The regular spiral flute geometry and parallel web configuration promote consistent chip evacuation in through-hole and blind-hole drilling. It is installed by machinists, tool and die makers, and maintenance technicians working with manual drill presses, CNC machining centers, and gang-drill setups where a compact, rigid bit profile is preferred over longer jobber-length alternatives.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eLetter I size: 0.2720 inches diameter for precise fit in size-toleranced hole applications\u003c\/li\u003e\n  \u003cli\u003e135-degree split point reduces entry walking and decreases axial thrust load\u003c\/li\u003e\n  \u003cli\u003eTiN coating extends cutting edge life and reduces built-up edge on ferrous materials\u003c\/li\u003e\n  \u003cli\u003eScrew machine length (2-11\/16 inches OAL) provides greater rigidity than jobber-length bits\u003c\/li\u003e\n  \u003cli\u003eWeb-thinned parallel web design promotes clean chip flow and reduces heat concentration\u003c\/li\u003e\n  \u003cli\u003eHeavy-duty grade construction rated for sustained production drilling cycles\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as a direct-fit replacement for Letter I screw machine length drill bits used in standard three-jaw chucks and straight-shank collet toolholders accepting a 0.2720-inch shank diameter.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstall in a properly sized drill chuck or collet and tighten to the toolholder manufacturer's specified clamping torque range before operation. Ensure the spindle is fully stopped and locked out before changing bits. Use cutting fluid appropriate for the workpiece material to maintain TiN coating integrity and extend service intervals. Inspect the cutting edge for chipping or coating wear before each production run; a damaged split point will increase thrust and reduce hole quality.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDrill Bit Size (Letter)\u003c\/strong\u003e: I\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDrill Bit Size (Decimal Inch)\u003c\/strong\u003e: 0.2720 inches\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: TiN (Titanium Nitride)\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\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\u003eShank Diameter\u003c\/strong\u003e: 0.2720 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 2-11\/16 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlute Length\u003c\/strong\u003e: 1-1\/2 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeb Configuration\u003c\/strong\u003e: Parallel\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeb Thinning\u003c\/strong\u003e: Web-Thinned\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDrill Bit Grade\u003c\/strong\u003e: Heavy Duty\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoolant Through\u003c\/strong\u003e: No\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: 66693466\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"HERTEL","offers":[{"title":"Default Title","offer_id":51740921528626,"sku":"66693466","price":15.2,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/86bdc9c54a686b8d48f43484f78eb8bb.jpg?v=1788828343","url":"https:\/\/voomisupply.com\/products\/hertel-66693466-screw-machine-drill-bit-letter-i-tin-hss","provider":"Voomi Supply","version":"1.0","type":"link"}