{"product_id":"hertel-66693391-screw-machine-drill-bit-letter-a-tin-hss","title":"Hertel 66693391 Screw Machine Drill Bit Letter a Tin Hss","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe HERTEL 66693391 is a screw machine length drill bit designed for high-production drilling in metal fabrication, machining, and general mechanical applications. Built from high-speed steel (HSS) with a titanium nitride (TiN) coating, it delivers extended tool life and reduced friction during cutting. The bit features a 135-degree split point that reduces walking on entry without a center punch, and a web-thinned, parallel web configuration that lowers thrust requirements. At 2-7\/16 inches overall length with a 1-5\/16-inch flute length, the screw machine format provides extra rigidity compared to jobber-length bits, making it well suited for drill press and CNC turret work where chatter control matters.\u003c\/p\u003e\n\u003cp\u003eThis bit is intended for use in machine shop environments, production drilling cells, and maintenance applications where consistent hole quality in metal is required. The 0.2340-inch decimal diameter corresponds to Letter A sizing and falls within the 0.2000 to 0.2500-inch drill bit size range. Right-hand spiral flute geometry pairs with the straight-cylindrical shank for secure chuck engagement in standard drill chucks and quick-change tool holders. The heavy-duty grade designation indicates suitability for interrupted cuts and tougher workpiece materials.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e135-degree split point reduces walk on entry and lowers required thrust force\u003c\/li\u003e\n  \u003cli\u003eTiN coating extends tool life and reduces heat buildup at the cutting edge\u003c\/li\u003e\n  \u003cli\u003eWeb-thinned, parallel web construction decreases cutting resistance\u003c\/li\u003e\n  \u003cli\u003eScrew machine length (2-7\/16 inches OAL) provides added rigidity over jobber-length bits\u003c\/li\u003e\n  \u003cli\u003eStraight-cylindrical shank fits standard drill chucks and quick-change holders\u003c\/li\u003e\n  \u003cli\u003eHeavy-duty grade HSS construction rated for production drilling cycles\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as a screw machine length replacement or production drill bit for applications requiring a Letter A (0.2340-inch) diameter hole in metal using standard three-jaw drill chucks or quick-change tool holders with straight-shank capability.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation and use should be performed by machinists or qualified mechanical tradespeople familiar with drill press, lathe, or CNC turret operation. Secure the straight-cylindrical shank firmly in the chuck before operation and verify runout is within acceptable tolerance for the application. Coolant through is not supported on this bit, so apply cutting fluid externally when drilling steel or other ferrous materials to manage heat. Inspect the cutting edges for wear or chipping before each production run and replace when drill point geometry is no longer intact.\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: A\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDrill Bit Size (Inch)\u003c\/strong\u003e: 15\/64\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDrill Bit Size (Decimal Inch)\u003c\/strong\u003e: 0.2340 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 2-7\/16 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlute Length\u003c\/strong\u003e: 1-5\/16 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 0.2340 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: 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\u003eSpiral Type\u003c\/strong\u003e: Regular\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlute Type\u003c\/strong\u003e: Spiral\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCutting Direction\u003c\/strong\u003e: Right Hand\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\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\u003eDrill Bit Size Range (Decimal Inch)\u003c\/strong\u003e: 0.2000 to 0.2500 inches\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: 66693391\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"HERTEL","offers":[{"title":"Default Title","offer_id":51743013929266,"sku":"66693391","price":14.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/e8751e9f56f3affbd13bfd99070dbea9.jpg?v=1788841575","url":"https:\/\/voomisupply.com\/products\/hertel-66693391-screw-machine-drill-bit-letter-a-tin-hss","provider":"Voomi Supply","version":"1.0","type":"link"}