{"product_id":"sandvik-coromant-7781839-carbide-drill-bit-7mm-140","title":"Sandvik Coromant 7781839 Carbide Drill Bit 7mm 140","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe SANDVIK COROMANT 7781839 is a solid carbide jobber-length drill bit engineered for high-performance drilling in demanding production environments. Sized at 7 mm (0.2756 inches) in diameter, it features a 140-degree drill point angle and a dual-layer TiAlSiN\/TiSiN coating that resists heat and extends tool life at elevated cutting speeds. The straight-cylindrical shank measures 8 mm (0.3150 inches) in diameter and seats securely in standard chucks and collets. With a 2-flute right-hand spiral design and through-coolant capability, this bit maintains chip evacuation and thermal control during deep-hole operations. It is installed by machinists and CNC operators in metalworking and manufacturing applications.\u003c\/p\u003e\n\u003cp\u003eThis drill bit is designed for use across a broad range of workpiece materials, including steel, stainless steel, cast iron, non-ferrous metals, superalloys, titanium, and hard materials. It carries ISO material group codes P, M, K, N, S, and H, making it suitable for both general production drilling and high-demand aerospace or automotive machining. The 10xD flute-to-diameter ratio supports deeper penetration without sacrificing rigidity. The overall length of 126 mm (4.9606 inches) and a maximum drilling depth of 57.30 mm (3.3071 inches) fit standard machining center setups.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eSolid carbide construction in Series 860-GM for rigidity and wear resistance in hard and abrasive materials\u003c\/li\u003e\n  \u003cli\u003eTiAlSiN\/TiSiN dual-layer coating extends tool life and supports high cutting speeds\u003c\/li\u003e\n  \u003cli\u003e140-degree drill point angle reduces thrust force and improves centering on entry\u003c\/li\u003e\n  \u003cli\u003eThrough-coolant capability supports chip flushing and heat reduction in deep-hole drilling\u003c\/li\u003e\n  \u003cli\u003e10xD flute-by-diameter ratio allows drilling to a maximum depth of 57.30 mm (3.3071 inches)\u003c\/li\u003e\n  \u003cli\u003eStraight-cylindrical shank conforms to DIN 6535HA specification for precise tool holding\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned for use with standard drill chucks, collets, and hydraulic toolholders that accept an 8 mm straight-cylindrical shank per DIN 6535HA. Suitable for ISO material groups P, M, K, N, S, and H as specified in the product data.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation and tool changes should be performed by qualified machinists with the machine spindle fully stopped and the machine in a safe, de-energized state. Verify that the toolholder bore and shank are clean and free of chips before seating the bit. Through-coolant lines should be confirmed clear and at the correct pressure for the application before commencing drilling. Follow the machine manufacturer and tool manufacturer guidelines for speed and feed selection based on workpiece material.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDrill Bit Diameter\u003c\/strong\u003e: 7 mm (0.2756 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\u003eCoating\u003c\/strong\u003e: TiAlSiN \/ TiSiN\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Solid Carbide\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 126 mm (4.9606 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlute Length\u003c\/strong\u003e: 84 mm (3.3071 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaximum Drilling Depth\u003c\/strong\u003e: 57.30 mm (3.3071 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 8 mm (0.3150 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDrill Point Length\u003c\/strong\u003e: 1.20 mm (0.0472 inches)\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\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\u003eCoolant Through\u003c\/strong\u003e: Yes\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlute by Diameter Ratio\u003c\/strong\u003e: 10xD\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: 860-GM\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial Grade\u003c\/strong\u003e: X1BM\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSpecification\u003c\/strong\u003e: DIN 6535HA\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePrimary Workpiece Materials\u003c\/strong\u003e: Steel, Stainless Steel, Cast Iron, Non-Ferrous Metal, Superalloys and Titanium, Hard Material\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eISO Material Codes\u003c\/strong\u003e: P, M, K, N, S, H\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePackage Weight\u003c\/strong\u003e: 0.152 pounds\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePackage Dimensions\u003c\/strong\u003e: 6.1 x 0.98 x 0.98 inches\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: SANDVIK COROMANT\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 7781839\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SANDVIK COROMANT","offers":[{"title":"Default Title","offer_id":51727922626866,"sku":"7781839","price":487.18,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/96acd2aaa614114841d050ab35ad8005.jpg?v=1788684583","url":"https:\/\/voomisupply.com\/products\/sandvik-coromant-7781839-carbide-drill-bit-7mm-140","provider":"Voomi Supply","version":"1.0","type":"link"}