{"product_id":"osg-hp255-2913-carbide-jobber-drill-bit-7-4mm","title":"Osg HP255-2913 Carbide Jobber Drill Bit 7.4mm","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe OSG HP255-2913 is a solid carbide jobber-length drill bit designed for high-performance drilling in ferrous materials. It carries a 7.4 mm diameter, a 140-degree point angle with R-thinned geometry for self-centering entry, and an overall length of 91 mm with a 53 mm flute length. The WD1 coating extends tool life in demanding applications involving steel, alloy steel, and cast iron. The straight-cylindrical shank measures 8.0 mm in diameter and seats securely in standard drill chucks or toolholders. This bit is intended for use by machinists and tool-and-die professionals working with CNC machining centers, drill presses, and manual lathes.\u003c\/p\u003e\u003cp\u003eThis drill bit is suited for production and maintenance drilling operations on steel, alloy steel, and cast iron workpieces. Typical applications include blind hole drilling, cross-hole drilling, and through-hole drilling in close-tolerance environments. The 5xD flute-by-diameter ratio supports chip evacuation in moderate-depth holes. The R-thinned point reduces thrust force and aids in self-centering without a center punch on rigid setups. Coolant-through capability supports high-speed machining with internal coolant delivery for improved chip clearing and heat management.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eSolid carbide construction for rigidity and wear resistance in ferrous materials\u003c\/li\u003e\n\u003cli\u003eWD1 coating for extended tool life in steel and cast iron\u003c\/li\u003e\n\u003cli\u003e140-degree R-thinned point for self-centering entry and reduced thrust\u003c\/li\u003e\n\u003cli\u003eCoolant-through design supports internal coolant delivery\u003c\/li\u003e\n\u003cli\u003eStraight-cylindrical 8.0 mm shank fits standard toolholders and drill chucks\u003c\/li\u003e\n\u003cli\u003eRegular spiral flute with tapered web for stable chip evacuation\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned for drilling steel, alloy steel, and cast iron workpieces; compatible with workpiece material codes P and K per ISO classification. Fits standard straight-shank drill chucks and ER-style collet holders accepting an 8.0 mm shank.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation and use should be performed by qualified machinists familiar with rotating cutting tool safety. Ensure the machine spindle is fully stopped and the tool is securely clamped in the holder before beginning setup. Verify spindle speed and feed rate against the material and coating manufacturer recommendations before cutting. Coolant-through tools require a compatible spindle coolant supply to realize full performance benefit.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Bit Diameter\u003c\/strong\u003e: 7.4 mm (0.2913 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 91 mm (3.583 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlute Length\u003c\/strong\u003e: 53 mm (2.087 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 8.0 mm (0.315 inches)\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\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\u003eWeb Configuration\u003c\/strong\u003e: Tapered\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\u003eMaterial\u003c\/strong\u003e: Solid Carbide\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating\/Finish\u003c\/strong\u003e: WD1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoolant Through\u003c\/strong\u003e: Yes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlute by Diameter Ratio\u003c\/strong\u003e: 5xD\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDiameter 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 Application\u003c\/strong\u003e: Blind Hole, Cross Hole, Drilling, Self-Centering\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: HP255\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.135 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: HP255-2913\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"OSG","offers":[{"title":"Default Title","offer_id":51748246978866,"sku":"HP255-2913","price":162.4,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/ef3832ec264dd06b2f7b2a2d3fa5032f.jpg?v=1788891062","url":"https:\/\/voomisupply.com\/products\/osg-hp255-2913-carbide-jobber-drill-bit-7-4mm","provider":"Voomi Supply","version":"1.0","type":"link"}