{"product_id":"osg-hp253-3976-solid-carbide-screw-machine-drill-bit","title":"Osg HP253-3976 Solid Carbide Screw Machine Drill Bit","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe OSG HP253-3976 is a solid carbide screw machine length drill bit designed for high-performance drilling in ferrous materials. It measures 0.3976 inches (10.10 mm) in diameter with a 140-degree split point and an overall length of 102.00 mm (approximately 4.02 inches). The two-flute spiral design with R-thinned, tapered web geometry reduces thrust and improves chip evacuation at the point. Built-in coolant-through capability supports high-speed, deep-hole operations where heat and chip buildup are concerns. This bit is suited for machine tool applications and is typically run by machinists or tool-and-die professionals on CNC lathes, machining centers, and turret-type screw machines.\u003c\/p\u003e\n\u003cp\u003eThis drill bit is engineered for primary use in steel, alloy steel, and cast iron workpieces. The screw machine (stub) length format provides added rigidity compared to jobber-length bits, reducing deflection in close-tolerance drilling operations. The 3xD flute-to-diameter ratio and straight-cylindrical shank with a 12.00 mm (approximately 0.472 inch) shank diameter allow it to seat securely in standard drill chucks and collets. It fits within the 0.3500 to 0.4000 inch (9.50 to 11.00 mm) drill bit size range of the HP253 series.\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, tapered web for reduced entry thrust\u003c\/li\u003e\n  \u003cli\u003eCoolant-through design supports high-speed and deep-hole drilling operations\u003c\/li\u003e\n  \u003cli\u003eRight-hand cut, two-flute spiral configuration for consistent chip evacuation\u003c\/li\u003e\n  \u003cli\u003eScrew machine (stub) length for improved rigidity and reduced deflection\u003c\/li\u003e\n  \u003cli\u003eCoated finish for extended tool life in steel and alloy steel applications\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned for use in steel, alloy steel, and cast iron workpieces. Compatible with standard drill chucks and collets accepting a 12.00 mm straight-cylindrical shank. Part of the OSG HP253 series covering the 0.3500 to 0.4000 inch diameter range.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eThis bit is intended for use by machinists operating CNC or manual machine tools. Ensure the shank is fully seated and properly torqued in the chuck or collet before operation. Set spindle speed and feed rate per the tooling manufacturer recommendations for the specific workpiece material and machine. Inspect the cutting edges and web for wear or chipping before each use, as solid carbide tooling is brittle and can fracture if run in a worn or improperly set up condition.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDrill Bit Diameter\u003c\/strong\u003e: 0.3976 inches (10.10 mm)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 102.00 mm (approximately 4.02 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 12.00 mm (approximately 0.472 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlute Length\u003c\/strong\u003e: 55.00 mm (approximately 2.17 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\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\u003eShank Type\u003c\/strong\u003e: Straight-Cylindrical\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTool Material\u003c\/strong\u003e: Solid Carbide\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoating\u003c\/strong\u003e: Coated\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\u003eCoolant Through\u003c\/strong\u003e: Yes\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\u003ePrimary Workpiece Material\u003c\/strong\u003e: Steel, Alloy Steel, Cast Iron\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDrill Bit Diameter Tolerance\u003c\/strong\u003e: +0.007 to +0.025 mm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDrill Bit Size Range\u003c\/strong\u003e: 0.3500 to 0.4000 inches (9.50 to 11.00 mm)\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: 0.235 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: HP253-3976\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"OSG","offers":[{"title":"Default Title","offer_id":51728100262194,"sku":"HP253-3976","price":180.14,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/54fddb9c1de18eba98d9dccb38482aa5.jpg?v=1788687959","url":"https:\/\/voomisupply.com\/products\/osg-hp253-3976-solid-carbide-screw-machine-drill-bit","provider":"Voomi Supply","version":"1.0","type":"link"}