{"product_id":"osg-631024911-solid-carbide-jobber-drill-letter-e-0-25-in","title":"Osg 631024911 Solid Carbide Jobber Drill Letter E 0.25 in","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe OSG 631024911 is a solid carbide jobber-length drill bit sized to Letter E (0.2500 inch \/ 6.35 mm). It features a 140-degree R-thinned point that promotes self-centering entry and reduces thrust load on the spindle. The EgiAs multi-layer coating extends tool life in abrasive and hardened workpiece materials. With a straight cylindrical shank and right-hand spiral flute geometry, this drill mounts directly in standard chucks and collet holders. It is built to OSG Series 6310 specifications and is intended for high-performance production or job-shop drilling in ferrous materials. Overall length is 3.5827 inches (91.00 mm) and the flute length is 2.0866 inches (53.00 mm).\u003c\/p\u003e\u003cp\u003eThis drill bit is suited for drilling blind holes, cross holes, and through holes in steel, cast iron, and hardened materials. The 5xD flute-to-diameter ratio provides adequate chip clearance in moderate-depth applications. It is commonly used in machining centers, CNC lathes with live tooling, and manual drill presses wherever solid carbide tooling is specified over high-speed steel. The tapered web and R-thinned point geometry reduce the need for a separate center-drill operation on flat or slightly curved surfaces.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eSolid carbide construction for rigidity and wear resistance in hard and abrasive materials\u003c\/li\u003e\n\u003cli\u003e140-degree R-thinned point for self-centering entry and reduced thrust\u003c\/li\u003e\n\u003cli\u003eEgiAs multi-layer proprietary coating for extended tool life\u003c\/li\u003e\n\u003cli\u003eRight-hand regular spiral flute with 5xD ratio for efficient chip evacuation\u003c\/li\u003e\n\u003cli\u003eStraight cylindrical shank fits standard chucks and ER collet systems\u003c\/li\u003e\n\u003cli\u003eTapered web configuration maintains core strength through the flute length\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-specification solid carbide jobber drill for use in standard straight-shank drill chucks and ER collet holders accepting a 0.2500-inch shank diameter. Primary workpiece material codes P, K, and H cover steel, cast iron, and hardened materials.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation and tool changes should be performed by a qualified machinist with the spindle fully stopped and the machine in a safe, locked-out state. Confirm that the chuck or collet is rated for the spindle speed being used with carbide tooling. Avoid side-loading the drill during entry, as solid carbide is brittle and susceptible to fracture under lateral force. Use appropriate cutting fluid or coolant where the machining setup permits, even though this drill does not feature through-coolant capability.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Bit Size (Inch)\u003c\/strong\u003e: 1\/4 inch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Bit Size (Letter)\u003c\/strong\u003e: E\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Bit Size (mm)\u003c\/strong\u003e: 6.35 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Bit Size (Decimal Inch)\u003c\/strong\u003e: 0.2500 inch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Bit Material\u003c\/strong\u003e: Solid Carbide\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Point Angle\u003c\/strong\u003e: 140 degrees\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePoint Type\u003c\/strong\u003e: R-Thinned\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating\/Finish\u003c\/strong\u003e: EgiAs Multi-layer\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlute Type\u003c\/strong\u003e: Regular Spiral\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting Direction\u003c\/strong\u003e: Right Hand\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Flutes\u003c\/strong\u003e: 2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 3.5827 inches (91.00 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlute Length\u003c\/strong\u003e: 2.0866 inches (53.00 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 0.2500 inch (1\/4 inch)\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: Tapered\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeb Thinning\u003c\/strong\u003e: R-Thinned\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlute By Diameter Ratio\u003c\/strong\u003e: 5xD\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Bit Diameter Tolerance\u003c\/strong\u003e: +0 to -0.022 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrimary Workpiece Material\u003c\/strong\u003e: Steel, Cast Iron, Hardened Materials\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTool Application\u003c\/strong\u003e: Blind Hole, Cross Hole, Drilling, Self-Centering\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoolant Through\u003c\/strong\u003e: No\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: 6310\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.07 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: OSG\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 631024911\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"OSG","offers":[{"title":"Default Title","offer_id":51749149966642,"sku":"631024911","price":152.77,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/172810fc138da7ef9b15339ce5eada04_b5d2f8bc-8708-4b2e-8ba9-6448053389ac.jpg?v=1788902650","url":"https:\/\/voomisupply.com\/products\/osg-631024911-solid-carbide-jobber-drill-letter-e-0-25-in","provider":"Voomi Supply","version":"1.0","type":"link"}