{"product_id":"osg-hp243-1575-screw-machine-drill-bit-4mm-carbide","title":"Osg HP243-1575 Screw Machine Drill Bit 4mm Carbide","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe OSG HP243-1575 is a screw machine length drill bit engineered for high-performance drilling in steel, alloy steel, and cast iron. It is constructed from solid carbide and features an EgiAs coating designed to extend tool life and improve chip evacuation under demanding cutting conditions. The 4.00 mm diameter bit runs at a 140-degree point angle with an R-thinned point geometry, which reduces thrust and improves centering at entry. Overall length is 66.00 mm (2.5984 inches) with a 24.00 mm flute length. The straight-cylindrical shank measures 6.00 mm in diameter. This bit is intended for use by machinists and tool-and-die professionals in production drilling environments.\u003c\/p\u003e\n\u003cp\u003eThe HP243-1575 fits screw machine length drilling applications where a compact, rigid drill is preferred over jobber or long-series lengths. The 3xD flute-to-diameter ratio and regular spiral flute configuration make it well suited for short-hole drilling in ferrous materials including steel, alloy steel, and cast iron. It is a right-hand cutting tool intended for use in CNC machining centers, drill presses, and manual or automatic screw machines. Coolant-through is not supported on this model. The tapered web configuration pairs with the R-thinned point to reduce walking and improve hole entry accuracy without a center drill in many setups.\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\u003eEgiAs coating for extended tool life and improved cutting performance\u003c\/li\u003e\n  \u003cli\u003e140-degree point angle with R-thinned geometry reduces entry thrust and improves centering\u003c\/li\u003e\n  \u003cli\u003eScrew machine length (3xD) design provides compact reach and high rigidity\u003c\/li\u003e\n  \u003cli\u003eStraight-cylindrical shank at 6.00 mm diameter for standard collet and chuck compatibility\u003c\/li\u003e\n  \u003cli\u003eRight-hand spiral flute with tapered web for efficient chip removal\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eThe HP243-1575 is part of the OSG HP243 series and is sized for drilling steel, alloy steel, and cast iron workpieces. It falls within the 3.50 mm to 5.00 mm drill bit size range of the series and fits standard 6.00 mm straight-cylindrical shank tool holders.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eThis bit is installed by machinists in collet chucks or drill chucks rated for the 6.00 mm shank diameter. Ensure the spindle and work holding are fully secured before operation and confirm RPM and feed rate are appropriate for solid carbide tooling in the target workpiece material. Do not exceed the tool's design parameters for depth-to-diameter ratio on a single pass. Inspect the cutting edges and coating condition before each use to avoid tool failure in hardened or abrasive workpiece materials.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDrill Bit Diameter\u003c\/strong\u003e: 4.00 mm (0.1575 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 66.00 mm (2.5984 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlute Length\u003c\/strong\u003e: 24.00 mm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 6.00 mm (0.2362 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\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSpiral Type\u003c\/strong\u003e: Regular\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeb Configuration\u003c\/strong\u003e: Tapered\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\u003eTool Material\u003c\/strong\u003e: Solid Carbide\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoating\/Finish\u003c\/strong\u003e: EgiAs\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 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: No\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDrill Bit Diameter Tolerance\u003c\/strong\u003e: +0.004 to +0.016 mm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: HP243\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.08 pounds\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUNSPSC Code\u003c\/strong\u003e: 23241635\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: HP243-1575\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"OSG","offers":[{"title":"Default Title","offer_id":51749213471026,"sku":"HP243-1575","price":75.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/4f332c1e0b7c23cf45ecb3534bab697f.jpg?v=1788903212","url":"https:\/\/voomisupply.com\/products\/osg-hp243-1575-screw-machine-drill-bit-4mm-carbide","provider":"Voomi Supply","version":"1.0","type":"link"}