{"product_id":"hertel-04139473-cobalt-jobber-drill-bit-letter-t","title":"Hertel 04139473 Cobalt Jobber Drill Bit Letter T","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe HERTEL 04139473 is a cobalt jobber-length drill bit sized to Letter T (0.3580 inches) with a 135-degree split point. It is designed for holemaking in metal and hard materials where a standard high-speed steel bit would wear prematurely. The split-point geometry reduces walking at start and lowers thrust requirements. An oxide and TiN coating provides added surface hardness and lubricity. The straight-cylindrical shank fits standard three-jaw drill chucks. Machinists, toolroom technicians, pipefitters, and maintenance trades use this bit for precision drilling in ferrous and non-ferrous workpieces.\u003c\/p\u003e\n\u003cp\u003eThis drill bit is suited for general holemaking operations in steel, stainless, cast iron, and other tough materials in both shop and field environments. The jobber-length flute gives a good balance between reach and rigidity for the Letter T diameter range. The right-hand spiral flute clears chips efficiently during through-hole drilling. It is appropriate for use in drill presses, milling machines, and hand-held electric drills with sufficient chuck capacity for a 0.3580-inch shank.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eLetter T size at 0.3580 inches decimal equivalent for precise hole sizing\u003c\/li\u003e\n  \u003cli\u003e135-degree split point reduces drill walking and lowers feed pressure\u003c\/li\u003e\n  \u003cli\u003eCobalt construction handles elevated heat generated in hard or abrasive materials\u003c\/li\u003e\n  \u003cli\u003eOxide and TiN dual coating improves surface hardness and extends tool life\u003c\/li\u003e\n  \u003cli\u003eWeb-thinned, tapered web configuration reduces axial load during penetration\u003c\/li\u003e\n  \u003cli\u003eStraight-cylindrical shank compatible with standard drill chucks\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as an OEM-style jobber drill for use in any standard drill chuck accepting a 0.3580-inch straight-cylindrical shank, including drill presses, CNC machining centers, and hand-held electric drills.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eThis bit is installed and removed by a qualified machinist or trades professional using a standard keyed or keyless drill chuck rated for the shank diameter. Secure the workpiece before drilling to prevent rotation or movement. Appropriate cutting fluid or coolant is recommended when drilling ferrous metals to extend tool life, though this bit does not support through-coolant delivery. Inspect the cutting edges for wear or chipping before each use and replace if the split point is damaged.\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: T\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDrill Bit Size (Decimal Inch)\u003c\/strong\u003e: 0.3580 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\u003eDrill Bit Material\u003c\/strong\u003e: Cobalt\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoating\/Finish\u003c\/strong\u003e: Oxide and TiN\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\u003eCutting Direction\u003c\/strong\u003e: Right Hand\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlute Length\u003c\/strong\u003e: 3.5 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 4.875 inches\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: 0.3580 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeb Configuration\u003c\/strong\u003e: Tapered, 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\u003eSeries\u003c\/strong\u003e: Jobber\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoolant Through\u003c\/strong\u003e: No\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDouble Margin\u003c\/strong\u003e: No\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTool Application\u003c\/strong\u003e: Holemaking\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.63 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: 04139473\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"HERTEL","offers":[{"title":"Default Title","offer_id":51755183767858,"sku":"04139473","price":24.72,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/5fbe39a0521ed96ffa52e949851ffc15.jpg?v=1788951943","url":"https:\/\/voomisupply.com\/products\/hertel-04139473-cobalt-jobber-drill-bit-letter-t","provider":"Voomi Supply","version":"1.0","type":"link"}