{"product_id":"osg-hp253-3858-carbide-screw-machine-drill-bit-0-3858-in","title":"Osg HP253-3858 Carbide Screw Machine Drill Bit 0.3858 in","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe OSG HP253-3858 is a solid carbide screw machine length drill bit designed for high-performance drilling in demanding metalworking applications. It features a 0.3858 inch (Letter W \/ 9.80 mm) diameter, a 140-degree split point, and a right-hand spiral flute geometry with R-thinned web for reduced thrust and improved chip evacuation. Coolant-through capability supports extended tool life in production environments. With an overall length of 89.00 mm and a straight-cylindrical shank diameter of 10.00 mm, this bit is built for precision, high-cycle drilling where rigidity and dimensional accuracy are critical.\u003c\/p\u003e\n\u003cp\u003eThis drill bit is suited for machining steel, alloy steel, and cast iron in production shop, job shop, and CNC machining center environments. The screw machine length (stub) configuration provides maximum rigidity for tight-tolerance holes. The 3xD flute-to-diameter ratio and tapered web construction make it well suited for short-hole drilling operations where runout and deflection must be minimized. It is typically installed and operated by machinists and toolroom professionals working with ferrous workpiece materials.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eSolid carbide construction for rigidity and wear resistance in ferrous materials\u003c\/li\u003e\n  \u003cli\u003e140-degree point angle with R-thinned web reduces entry thrust and improves centering\u003c\/li\u003e\n  \u003cli\u003eCoolant-through design supports high-speed production drilling and extended tool life\u003c\/li\u003e\n  \u003cli\u003eScrew machine (stub) length provides maximum rigidity and minimal deflection\u003c\/li\u003e\n  \u003cli\u003eRight-hand cut with regular spiral flute for consistent chip flow\u003c\/li\u003e\n  \u003cli\u003eDiameter tolerance of +0.006 to +0.021 mm for close-tolerance hole requirements\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned for drilling steel, alloy steel, and cast iron workpieces. Fits standard straight-cylindrical shank tool holders with a 10.00 mm bore. Suitable for CNC machining centers and manual drill press setups configured for carbide tooling and through-spindle or external coolant delivery.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation and operation should be performed by qualified machinists familiar with carbide tooling requirements. Ensure the tool holder bore and shank are clean and free of debris before securing the bit. Carbide tooling is brittle and should never be used in machines with excessive runout or vibration. Always verify coolant flow is active before engaging the cut when using the through-coolant feature.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDrill Bit Diameter\u003c\/strong\u003e: 0.3858 inches (9.80 mm, Letter W)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDrill Point Angle\u003c\/strong\u003e: 140 degrees\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTool Material\u003c\/strong\u003e: Solid Carbide\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoating\/Finish\u003c\/strong\u003e: Coated\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\u003eFlute Length\u003c\/strong\u003e: 47.00 mm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 89.00 mm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 10.00 mm\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\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\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\u003eCoolant Through\u003c\/strong\u003e: Yes\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDrill Bit Diameter Tolerance\u003c\/strong\u003e: +0.006 to +0.021 mm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePrimary Workpiece Material\u003c\/strong\u003e: Steel, Alloy Steel, Cast Iron\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTool Performance\u003c\/strong\u003e: High Performance\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: HP253\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.165 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: OSG\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: HP253-3858\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"OSG","offers":[{"title":"Default Title","offer_id":51733198176562,"sku":"HP253-3858","price":204.97,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/8ef04fa4868a6a01a2e20fab81784d22.jpg?v=1788752676","url":"https:\/\/voomisupply.com\/products\/osg-hp253-3858-carbide-screw-machine-drill-bit-0-3858-in","provider":"Voomi Supply","version":"1.0","type":"link"}