{"product_id":"iscar-6403989-chamfering-boring-bar-solid-carbide","title":"Iscar 6403989 Chamfering Boring Bar Solid Carbide","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe ISCAR 6403989 is a chamfering boring bar designed for internal chamfering and bore preparation operations on small-diameter workpieces. Built from submicron solid carbide with a TiAlN and TiN finish coating, this bar delivers the hardness and wear resistance required for demanding machining environments. It features a right-hand cutting direction, a minimum bore diameter of 0.1575 inches, a maximum bore depth of 0.5906 inches, and an overall length of 1.1811 inches. The 20-degree bar end angle and 0.001-inch corner radius make it well-suited for precise internal chamfering work. Installed by CNC machinists and toolroom technicians, this bar fits into standard small-bore toolholding systems.\u003c\/p\u003e\u003cp\u003eThis chamfering boring bar is intended for small-bore internal machining applications where tight dimensional tolerances and controlled chamfer geometry are required. The 4.00 mm shank diameter and 30.00 mm overall length position it for use in swiss-style lathes, CNC turning centers, and precision boring machines handling small-diameter bores starting at 4.00 mm. The IC908 manufacturer grade indicates suitability for machining a broad range of workpiece materials including steels and stainless alloys at moderate to high cutting speeds. It is used in precision manufacturing, aerospace component work, and medical device machining where bore quality and consistency are critical.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eSubmicron solid carbide construction for high hardness and edge stability in small-bore applications\u003c\/li\u003e\n\u003cli\u003eTiAlN and TiN dual finish coating for improved wear resistance and thermal protection\u003c\/li\u003e\n\u003cli\u003eRight-hand cutting direction with a 20-degree bar end angle for controlled chamfer geometry\u003c\/li\u003e\n\u003cli\u003e0.001-inch corner radius for sharp, precise internal chamfer profiles\u003c\/li\u003e\n\u003cli\u003eIC908 manufacturer grade suitable for a wide range of workpiece materials at elevated cutting speeds\u003c\/li\u003e\n\u003cli\u003eCompact 1.1811-inch overall length fits small-bore toolholding setups in turning and boring machines\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-style replacement boring bar for use in standard small-bore internal toolholding systems accepting a 4.00 mm shank diameter.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation is performed by qualified CNC machinists or toolroom technicians. Power down and lock out the machine spindle before inserting or removing the boring bar from the toolholder. Ensure the shank is fully seated and the toolholder clamping mechanism is properly engaged before beginning any cutting operation. Inspect the cutting edge for wear or chipping before each use, as carbide tools can fracture under interrupted cuts or improper setup.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBoring Bar Type\u003c\/strong\u003e: Chamfering\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting Direction\u003c\/strong\u003e: Right Hand\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMinimum Bore Diameter\u003c\/strong\u003e: 0.1575 inches (4.00 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum Bore Depth\u003c\/strong\u003e: 0.5906 inches (15.00 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 1.1811 inches (30.00 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 4.00 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCorner Radius\u003c\/strong\u003e: 0.001 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBar End Angle\u003c\/strong\u003e: 20 degrees\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Solid Carbide\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial Grade\u003c\/strong\u003e: Submicron\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Grade\u003c\/strong\u003e: IC908\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinish Coating\u003c\/strong\u003e: TiAlN and TiN\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.011 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: ISCAR\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 6403989\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ISCAR","offers":[{"title":"Default Title","offer_id":51733648900402,"sku":"6403989","price":80.55,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/625bae0344127ff5377771edd3039f8f.jpg?v=1788757471","url":"https:\/\/voomisupply.com\/products\/iscar-6403989-chamfering-boring-bar-solid-carbide","provider":"Voomi Supply","version":"1.0","type":"link"}