{"product_id":"osg-10257005-screw-machine-drill-bit-0-257in-cobalt-hss","title":"Osg 10257005 Screw Machine Drill Bit 0.257in Cobalt Hss","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe OSG 10257005 is a screw machine length drill bit designed for high-performance drilling in steel and alloy steel applications. Built from cobalt high speed steel with a coated finish, this bit delivers increased heat and wear resistance compared to standard HSS tooling. It features a 130-degree split point with R-thinned web for easier penetration and reduced thrust. The straight-cylindrical shank seats securely in standard drill chucks. At 3.25 inches overall length with a 1.4375-inch flute, the stub-length geometry provides rigidity for accurate, on-center drilling in production and maintenance environments. This is a single-piece unit from OSG Series 1000, suited for machinists, tool-and-die techs, and industrial maintenance professionals.\u003c\/p\u003e\u003cp\u003eThis drill bit is intended for use in screw machine operations and general-purpose metal drilling where a short, rigid tool is preferred over jobber-length bits. It excels in drilling steel and alloy steel on drill presses, CNC lathes, turret lathes, and screw machines. The 3xD flute-to-diameter ratio and regular spiral keep chip evacuation clean in shorter-depth holes. The 0.257-inch diameter corresponds to Letter F sizing and 6.53 mm, making it a practical choice when matching drill charts for tapping or clearance holes in steel fabrication and machining work.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eCobalt high speed steel construction for improved heat resistance in steel and alloy steel drilling\u003c\/li\u003e\n\u003cli\u003e130-degree drill point angle with R-thinned web for reduced thrust and self-centering entry\u003c\/li\u003e\n\u003cli\u003eCoated finish for added surface hardness and extended tool life\u003c\/li\u003e\n\u003cli\u003eScrew machine (stub) length provides extra rigidity and minimizes deflection\u003c\/li\u003e\n\u003cli\u003eRight-hand spiral flute with regular helix for consistent chip evacuation\u003c\/li\u003e\n\u003cli\u003eStraight-cylindrical shank fits standard drill chucks without adapters\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as a direct-fit screw machine length drill bit for use in standard drill chucks, turret lathes, and CNC drilling applications targeting steel and alloy steel workpieces. Diameter tolerance is plus 0 to minus 0.022 mm.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation and use of this drill bit should be performed by machinists or qualified trade professionals familiar with rotating cutting tools. Ensure the machine spindle is fully stopped and locked out before inserting or removing the bit from the chuck. Verify chuck jaw condition and shank seating before operation. Follow applicable OSHA and machine-tool safety standards for speed, feed, and coolant selection based on workpiece material.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Bit Diameter\u003c\/strong\u003e: 0.257 inches (Letter F \/ 6.53 mm)\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: 1.4375 inches (36 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Point Angle\u003c\/strong\u003e: 130 degrees\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Flutes\u003c\/strong\u003e: 2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpiral Type\u003c\/strong\u003e: Regular\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlute Type\u003c\/strong\u003e: Spiral\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting Direction\u003c\/strong\u003e: Right Hand\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Type\u003c\/strong\u003e: Straight-Cylindrical\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePoint Type\u003c\/strong\u003e: Standard\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeb Thinning\u003c\/strong\u003e: R-Thinned\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeb Configuration\u003c\/strong\u003e: Tapered\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTool Material\u003c\/strong\u003e: Cobalt High Speed Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating\u003c\/strong\u003e: Coated\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrimary Workpiece Material\u003c\/strong\u003e: Steel, Alloy Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Length Type\u003c\/strong\u003e: Screw Machine\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlute by Diameter Ratio\u003c\/strong\u003e: 3xD\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDiameter Tolerance\u003c\/strong\u003e: plus 0 to minus 0.022 mm\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: 1000\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTool Performance\u003c\/strong\u003e: High Performance\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.076 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage Quantity\u003c\/strong\u003e: 1\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: 10257005\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"OSG","offers":[{"title":"Default Title","offer_id":51737058935090,"sku":"10257005","price":76.94,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/a3585e8fa88cc76a2f5b54c162f3f2b0.jpg?v=1788783725","url":"https:\/\/voomisupply.com\/products\/osg-10257005-screw-machine-drill-bit-0-257in-cobalt-hss","provider":"Voomi Supply","version":"1.0","type":"link"}