{"product_id":"hertel-66693607-screw-machine-drill-bit-letter-w-hss","title":"Hertel 66693607 Screw Machine Drill Bit Letter W Hss","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe HERTEL 66693607 is a screw machine length drill bit designed for high-production drilling in metal, steel, and other ferrous and non-ferrous materials. It carries a Letter W designation, which corresponds to a decimal diameter of 0.3860 inches, and is manufactured from high-speed steel with a titanium nitride (TiN) coating that extends cutting edge life by reducing friction and heat buildup. The 135-degree split point allows the bit to start on contact without a center punch, reducing walkout on flat surfaces. This bit is intended for use by machinists, tool-and-die tradespeople, and maintenance mechanics working in production or job-shop environments.\u003c\/p\u003e\u003cp\u003eScrew machine length drill bits are shorter than jobber-length bits, which provides greater rigidity and reduces deflection during drilling. This makes the 66693607 well suited for CNC machining centers, manual drill presses, and screw machines where controlled depth and positional accuracy matter. The straight-cylindrical shank accepts standard three-jaw chucks across a wide range of machine spindles. The heavy-duty grade designation indicates the bit is built for demanding cycle rates and harder workpiece materials within its size range of 0.3500 to 0.4000 inches.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eLetter W size at 0.3860 inches decimal diameter for precise hole dimensioning\u003c\/li\u003e\n\u003cli\u003e135-degree split point with web thinning reduces thrust and eliminates center-punch requirements\u003c\/li\u003e\n\u003cli\u003eTiN coating improves wear resistance and extends tool life in repetitive drilling cycles\u003c\/li\u003e\n\u003cli\u003eHigh-speed steel construction handles a broad range of metals and alloys\u003c\/li\u003e\n\u003cli\u003eScrew machine length body provides added rigidity over jobber-length alternatives\u003c\/li\u003e\n\u003cli\u003eStraight-cylindrical shank fits standard three-jaw chucks without adapters\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as a direct-fit replacement or add-to-stock drill bit for any machine spindle or chuck accepting a 0.3860-inch straight-cylindrical shank in the 0.3500 to 0.4000-inch drill bit size range.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation is performed by machinists or maintenance mechanics using a standard three-jaw chuck or collet system. Ensure the machine spindle is fully powered down and the chuck key is removed before inserting or changing the bit. Verify chuck runout and shank seating before initiating a cut. Coolant-through is not supported on this bit, so external coolant or cutting fluid should be applied at the work surface when drilling at high cycle rates or in harder materials.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Bit Size (Letter)\u003c\/strong\u003e: W\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Bit Size (Decimal Inch)\u003c\/strong\u003e: 0.3860 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\u003c\/strong\u003e: Titanium Nitride (TiN)\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\u003eShank Type\u003c\/strong\u003e: Straight-Cylindrical\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 0.3860 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 3.25 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlute Length\u003c\/strong\u003e: 1.875 inches\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\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\u003eCutting Direction\u003c\/strong\u003e: Right Hand\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\u003c\/strong\u003e: 0.3500 to 0.4000 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.12 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: 66693607\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"HERTEL","offers":[{"title":"Default Title","offer_id":51742355685682,"sku":"66693607","price":21.84,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/6c02727f1f3c84145709f6e900b0ced7.jpg?v=1788836940","url":"https:\/\/voomisupply.com\/products\/hertel-66693607-screw-machine-drill-bit-letter-w-hss","provider":"Voomi Supply","version":"1.0","type":"link"}