{"product_id":"osg-hp253-4528-screw-machine-drill-bit-11-50mm-carbide","title":"Osg HP253-4528 Screw Machine Drill Bit 11.50mm Carbide","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe OSG HP253-4528 is a solid carbide screw machine length drill bit engineered for high-performance drilling in steel, alloy steel, and cast iron. At 11.50 mm in diameter with a 140-degree point angle, it is designed to enter material cleanly and resist walking on flat or curved workpiece surfaces. The R-thinned point reduces thrust force at entry, while the EgiAs coating extends tool life in abrasive ferrous materials. With an overall length of 102 mm and a 55 mm flute length, this stub-length geometry provides rigidity in CNC machining centers, drill presses, and automated production equipment. Coolant-through capability supports high-speed metal removal with improved chip evacuation and thermal control.\u003c\/p\u003e\u003cp\u003eThis drill bit suits production machining environments where repeatability and tool life are priorities. The straight-cylindrical shank at 12.00 mm diameter seats securely in standard drill chucks and collet holders. Its 3xD flute-to-diameter ratio makes it well-suited for through-hole and blind-hole applications in ferrous workpieces across job shop and production floor settings. Machinists and tooling specialists working with CNC lathes, machining centers, or manual drill presses will find this bit consistent with demanding cycle times in steel and cast iron work.\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\u003eEgiAs coating extends tool life and reduces friction in steel and alloy steel\u003c\/li\u003e\n\u003cli\u003e140-degree point angle with R-thinned web minimizes entry thrust and reduces drill walk\u003c\/li\u003e\n\u003cli\u003eCoolant-through design supports chip evacuation and heat management at depth\u003c\/li\u003e\n\u003cli\u003eScrew machine (stub) length geometry improves rigidity over jobber-length alternatives\u003c\/li\u003e\n\u003cli\u003eRegular spiral, two-flute configuration for efficient chip removal in right-hand cutting\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned for use in steel, alloy steel, and cast iron workpieces. Compatible with standard straight-cylindrical shank chucks and collet systems accepting a 12.00 mm shank. Fits within the HP253 series drill bit family from OSG.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation and use should be performed by qualified machinists or tooling technicians familiar with CNC or manual drilling equipment. Ensure the spindle is fully stopped and the machine is locked out before mounting or removing the bit from the holder. Verify chuck or collet runout is within acceptable tolerance before beginning a cycle, as excessive runout accelerates carbide wear. Coolant lines should be confirmed open and flowing before engaging the drill in coolant-through mode.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Bit Diameter\u003c\/strong\u003e: 11.50 mm (0.4528 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 102 mm (4.0157 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlute Length\u003c\/strong\u003e: 55.00 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 12.00 mm (0.4724 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\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\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\u003eTool Material\u003c\/strong\u003e: Solid Carbide\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating\u003c\/strong\u003e: EgiAs\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\u003eSeries\u003c\/strong\u003e: HP253\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.245 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: HP253-4528\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"OSG","offers":[{"title":"Default Title","offer_id":51753374941490,"sku":"HP253-4528","price":294.78,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/00d5d01367bfc62a423f7a5168b935ac.jpg?v=1788935963","url":"https:\/\/voomisupply.com\/products\/osg-hp253-4528-screw-machine-drill-bit-11-50mm-carbide","provider":"Voomi Supply","version":"1.0","type":"link"}