{"product_id":"osg-8670440-screw-machine-drill-bit-4-40mm-carbide","title":"Osg 8670440 Screw Machine Drill Bit 4.40mm Carbide","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe OSG 8670440 is a solid carbide screw machine length drill bit designed for high-performance drilling in steel, alloy steel, and cast iron. It measures 4.40 mm in diameter with an overall length of 66 mm (2.5984 inches) and features a 140-degree point angle with R-thinned web geometry for improved chip evacuation and reduced thrust at entry. The EgiAs coating provides enhanced wear resistance and heat management during high-cycle production drilling. With a straight-cylindrical shank of 6 mm diameter, the bit seats securely in standard drill chucks and collet holders used in CNC machining centers and manual drill presses.\u003c\/p\u003e\u003cp\u003eThis bit is suited for screw machine operations, short-hole drilling, and production environments where tight tolerances and consistent hole quality are required. The stub-length design improves rigidity and reduces deflection, making it appropriate for close-tolerance work in ferrous materials. Machinists, tool-and-die professionals, and CNC operators working with steel and cast iron components will find this drill applicable across general job shop and production machining applications. It carries a flute-to-diameter ratio of 2xD and falls within the 3.50 to 5.00 mm diameter range of the OSG Series 6300 lineup.\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 for improved heat resistance and extended tool life\u003c\/li\u003e\n\u003cli\u003e140-degree point angle with R-thinned web for reduced entry thrust and better chip flow\u003c\/li\u003e\n\u003cli\u003eScrew machine (stub) length design minimizes deflection in short-hole applications\u003c\/li\u003e\n\u003cli\u003eStraight-cylindrical 6 mm shank compatible with standard chucks and collet systems\u003c\/li\u003e\n\u003cli\u003eRegular spiral flute with tapered web configuration for consistent chip evacuation\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned for use in steel, alloy steel, and cast iron workpieces. Part of the OSG Series 6300 screw machine length drill lineup covering the 3.50 to 5.00 mm diameter range.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation and tool changes should be performed with the machine fully powered down and spindle at a complete stop. Secure the shank fully within the chuck or collet to the recommended grip depth before tightening. Verify runout with a dial indicator before production use, as even minor misalignment accelerates wear on carbide tooling. Coolant-through is not supported on this bit, so adequate flood or mist coolant directed at the cutting zone is recommended when drilling ferrous materials at production feeds and speeds.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Bit Diameter\u003c\/strong\u003e: 4.40 mm (0.1732 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 66 mm (2.5984 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlute Length\u003c\/strong\u003e: 24 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 6 mm (0.2362 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePoint 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\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\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\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\u003eDrill Length Type\u003c\/strong\u003e: Screw Machine\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlute by Diameter Ratio\u003c\/strong\u003e: 2xD\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoolant Through\u003c\/strong\u003e: No\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDiameter Tolerance\u003c\/strong\u003e: +0 to -0.018 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\u003eSeries\u003c\/strong\u003e: 6300\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.045 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: 8670440\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"OSG","offers":[{"title":"Default Title","offer_id":51747483910450,"sku":"8670440","price":95.89,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/9bf571886532d1963a0d90ce4402317a.jpg?v=1788881227","url":"https:\/\/voomisupply.com\/products\/osg-8670440-screw-machine-drill-bit-4-40mm-carbide","provider":"Voomi Supply","version":"1.0","type":"link"}