{"product_id":"hertel-84578715-jobber-drill-bit-letter-t-hss-tin","title":"Hertel 84578715 Jobber Drill Bit Letter T Hss Tin","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe HERTEL 84578715 is a jobber-length twist drill bit sized to letter T (0.3580 inches decimal), designed for general-purpose drilling in metal, wood, and plastic. Built from high speed steel (HSS) with a titanium nitride (TiN) coating, it delivers extended tool life compared to uncoated HSS by reducing heat buildup and surface friction at the cutting edge. The 118-degree standard point angle suits a wide range of common materials without requiring specialized geometry. With a 4.875-inch overall length and a 3.5-inch flute length, this bit fits standard drill chucks and drill presses used in production and maintenance environments. Machinists, millwrights, and maintenance technicians are the primary users.\u003c\/p\u003e\u003cp\u003eThis bit is suited to light-to-medium production drilling, MRO work, and general shop operations where a letter-T diameter hole is required. The straight cylindrical shank accepts standard three-jaw chucks on benchtop drill presses, floor-standing drill presses, and hand-held electric drills. The regular spiral flute geometry and tapered web configuration with web thinning promote chip evacuation and reduce thrust load during entry, making it practical for through-hole work in steel, aluminum, and similar materials.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eLetter T size, 0.3580 inches decimal diameter, within the 0.3500 to 0.4000 inch range\u003c\/li\u003e\n\u003cli\u003eHigh speed steel construction with TiN coating for extended cutting life\u003c\/li\u003e\n\u003cli\u003e118-degree standard point angle for general-purpose use across common materials\u003c\/li\u003e\n\u003cli\u003eWeb-thinned tapered web reduces entry thrust and improves chip flow\u003c\/li\u003e\n\u003cli\u003e2-flute regular spiral geometry with right-hand cut\u003c\/li\u003e\n\u003cli\u003eStraight cylindrical shank, 0.3580 inches, fits standard drill chucks without adapters\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as a general-purpose jobber-length drill bit for use in standard three-jaw drill chucks accepting straight cylindrical shanks up to 0.3580 inches in diameter.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstall in a properly sized three-jaw chuck and tighten securely with a chuck key before operating. Set drill speed appropriate to the workpiece material and bit diameter — consult a speeds-and-feeds reference chart for HSS TiN-coated tooling. Secure the workpiece firmly before drilling to prevent rotation. Do not apply excessive downward pressure; let the cutting edge do the work to avoid premature coating wear or tip breakage.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Bit Size\u003c\/strong\u003e: Letter T\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDecimal Inch Diameter\u003c\/strong\u003e: 0.3580 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Point Angle\u003c\/strong\u003e: 118 degrees\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: High Speed Steel (HSS)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating\u003c\/strong\u003e: TiN (Titanium Nitride)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 4.875 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlute Length\u003c\/strong\u003e: 3.5 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 0.3580 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Type\u003c\/strong\u003e: Straight Cylindrical\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Flutes\u003c\/strong\u003e: 2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlute Type\u003c\/strong\u003e: Spiral, Regular\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting Direction\u003c\/strong\u003e: Right Hand\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePoint Type\u003c\/strong\u003e: Standard\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeb Configuration\u003c\/strong\u003e: Tapered, 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: General Purpose\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.585 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUNSPSC Code\u003c\/strong\u003e: 23241634\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: 84578715\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"HERTEL","offers":[{"title":"Default Title","offer_id":51729193828658,"sku":"84578715","price":21.09,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/77b6c5c005ccdd6db76df46fb1e05043.jpg?v=1788701769","url":"https:\/\/voomisupply.com\/products\/hertel-84578715-jobber-drill-bit-letter-t-hss-tin","provider":"Voomi Supply","version":"1.0","type":"link"}