{"product_id":"kennametal-4149257-solid-carbide-jobber-drill-21-64-inch","title":"Kennametal 4149257 Solid Carbide Jobber Drill 21\/64 Inch","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe KENNAMETAL 4149257 is a solid carbide jobber-length drill bit engineered for high-performance drilling in demanding metal-cutting applications. It measures 21\/64 inch (0.3281 inch) in diameter with a 140-degree split-point geometry and a multilayer TiAlN coating for heat resistance and extended tool life. The overall length is 4.0551 inches (103.00 mm) with a flute length of 2.4016 inches (61.00 mm). The straight cylindrical shank measures 0.3438 inch in diameter and 1.5748 inches in length. A right-hand, regular spiral flute design provides efficient chip evacuation. Coolant-through capability makes this drill suitable for deep-hole work and high-speed production environments. Licensed machinists, toolroom operators, and CNC operators typically specify this drill.\u003c\/p\u003e\u003cp\u003eThis jobber drill is suited for drilling steel, stainless steel, cast iron, aluminum, and other non-ferrous materials in both production and job-shop settings. The 5xD flute-to-diameter ratio and tapered web configuration support stability in through-hole and blind-hole operations. It conforms to DIN 6537K specification, making it compatible with standard tool holders and drill chucks that accept straight-cylindrical shanks in the 0.3438-inch shank diameter range. It is appropriate for CNC machining centers, drill presses, and manual milling machines where a precision carbide drill is required.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eSolid carbide construction for rigidity and wear resistance in ferrous and non-ferrous materials\u003c\/li\u003e\n\u003cli\u003eMultilayer TiAlN coating provides thermal protection and reduces built-up edge at elevated cutting speeds\u003c\/li\u003e\n\u003cli\u003e140-degree point angle reduces thrust force and improves self-centering on entry\u003c\/li\u003e\n\u003cli\u003eCoolant-through design supports deep-hole drilling and chip flushing in production applications\u003c\/li\u003e\n\u003cli\u003eRight-hand, regular spiral flute with tapered web for consistent chip evacuation\u003c\/li\u003e\n\u003cli\u003eConforms to DIN 6537K for dimensional interchangeability with standard tooling systems\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned for use in standard straight-shank drill chucks and collet-style tool holders accepting a 0.3438-inch shank diameter. Compatible workpiece materials listed in the specification include steel, stainless steel, cast iron, aluminum, and non-ferrous alloys.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation and use of this drill bit should be performed by qualified machinists or CNC operators familiar with carbide tooling. Ensure the machine spindle and tool holder are clean and properly torqued before securing the shank. Carbide tooling is brittle and should never be used in worn or loose chucks that allow runout. Verify coolant-through pressure and flow rate are within the machine and tooling specifications before starting a cut.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Bit Diameter\u003c\/strong\u003e: 21\/64 inch (0.3281 inch)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Point Angle\u003c\/strong\u003e: 140 degrees\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Solid Carbide\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating\u003c\/strong\u003e: Multilayer TiAlN\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 4.0551 inches (103.00 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlute Length\u003c\/strong\u003e: 2.4016 inches (61.00 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 0.3438 inch (10 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Length\u003c\/strong\u003e: 1.5748 inches (40 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum Drilling Depth\u003c\/strong\u003e: 1.9291 inches (49.00 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Point Length\u003c\/strong\u003e: 0.0557 inch (1.41 mm)\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: Regular Spiral\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpiral Type\u003c\/strong\u003e: Regular\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlute By Diameter Ratio\u003c\/strong\u003e: 5xD\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeb Configuration\u003c\/strong\u003e: Tapered\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Type\u003c\/strong\u003e: Straight Cylindrical\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting Direction\u003c\/strong\u003e: Right Hand\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoolant Through\u003c\/strong\u003e: Yes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Bit Diameter Tolerance\u003c\/strong\u003e: -0.0006 to 0.0000 inch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecification\u003c\/strong\u003e: DIN 6537K\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrimary Workpiece Materials\u003c\/strong\u003e: Steel, Stainless Steel, Cast Iron, Aluminum, Non-Ferrous\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.02 pounds\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eStandard Information\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: KENNAMETAL\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 4149257\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"KENNAMETAL","offers":[{"title":"Default Title","offer_id":51740627829042,"sku":"4149257","price":197.49,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/30fcb178c839e0a7bbce0c484c7b753e.jpg?v=1788826310","url":"https:\/\/voomisupply.com\/products\/kennametal-4149257-solid-carbide-jobber-drill-21-64-inch","provider":"Voomi Supply","version":"1.0","type":"link"}