{"product_id":"sandvik-coromant-7781458-screw-machine-drill-bit-7-14mm","title":"Sandvik Coromant 7781458 Screw Machine Drill Bit 7.14mm","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe SANDVIK COROMANT 7781458 is a solid carbide screw machine length drill bit engineered for high-performance drilling in metal cutting and machining applications. Built on the CoroDrill 860 platform, it features a 7.14 mm cutting diameter and a dual-layer TiAlSiN and TiSiN coating that resists heat and extends tool life in demanding materials. The 140-degree split point geometry reduces thrust force and improves centering without a pilot hole. With an overall length of 79 mm and a straight-cylindrical shank, this bit is suited for use in CNC machining centers, drill presses, and screw machine setups. Machinists and toolroom professionals are the primary end users.\u003c\/p\u003e\n\u003cp\u003eThis drill bit is designed for screw machine length applications requiring precision hole quality and controlled chip evacuation. The 3xD flute-to-diameter ratio and spiral flute geometry support efficient chip removal at moderate to high feed rates. Coolant-through capability makes it well matched to deep-hole applications where heat buildup and chip packing are concerns. Typical use cases include production drilling in steel, stainless steel, cast iron, and similar ferrous materials on manual or CNC equipment. The 8.00 mm straight-cylindrical shank fits standard collet chucks and drill chucks in that bore range.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eSolid carbide construction for rigidity and extended tool life versus high-speed steel alternatives\u003c\/li\u003e\n  \u003cli\u003eDual TiAlSiN and TiSiN coating for high heat resistance and reduced friction at the cutting edge\u003c\/li\u003e\n  \u003cli\u003e140-degree drill point angle improves self-centering and reduces entry burr\u003c\/li\u003e\n  \u003cli\u003eCoolant-through design channels coolant directly to the cutting zone for deep-hole applications\u003c\/li\u003e\n  \u003cli\u003eSpiral flute geometry promotes consistent chip evacuation at production feed rates\u003c\/li\u003e\n  \u003cli\u003eCoroDrill 860 series grade X1BM — matched to a broad range of ferrous workpiece materials\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as an OEM-specified replacement or direct addition within the SANDVIK COROMANT CoroDrill 860 series. Fits toolholders and collet systems accepting an 8.00 mm straight-cylindrical shank. Applicable drill bit size range is 6.50 mm to 8.00 mm per series specification.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation and tool changes should be performed by a qualified machinist with the machine powered down and all energy sources locked out per applicable OSHA lockout\/tagout procedures. Secure the shank fully within the collet or chuck to the recommended grip depth before torquing the retention hardware. Verify coolant-through passages are clear and coolant pressure is set according to the machine tool manufacturer guidelines before running the spindle. Inspect the cutting edge for chipping or wear before each use — solid carbide is brittle and should not be forced into interrupted cuts without confirming suitability.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDrill Bit Diameter\u003c\/strong\u003e: 7.14 mm (0.2811 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\u003eTool Material\u003c\/strong\u003e: Solid Carbide\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoating\u003c\/strong\u003e: TiAlSiN and TiSiN\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\u003eFlute Length\u003c\/strong\u003e: 41.00 mm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlute by Diameter Ratio\u003c\/strong\u003e: 3xD\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaximum Drilling Depth\u003c\/strong\u003e: 22.70 mm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDrill Point Length\u003c\/strong\u003e: 1.30 mm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 79.00 mm (3.1102 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Type\u003c\/strong\u003e: Straight-Cylindrical\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 8.00 mm (0.3150 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCutting Direction\u003c\/strong\u003e: Right Hand\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoolant Through\u003c\/strong\u003e: Yes\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDrill Bit Grade\u003c\/strong\u003e: X1BM\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: CoroDrill 860\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.1 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: SANDVIK COROMANT\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 7781458\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SANDVIK COROMANT","offers":[{"title":"Default Title","offer_id":51755020222770,"sku":"7781458","price":253.76,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/96acd2aaa614114841d050ab35ad8005_64c40abb-0ec3-4d47-a02e-dba28c56229f.jpg?v=1788950526","url":"https:\/\/voomisupply.com\/products\/sandvik-coromant-7781458-screw-machine-drill-bit-7-14mm","provider":"Voomi Supply","version":"1.0","type":"link"}