Iscar 6403993 Chamfering Boring Bar Submicron Solid Carbide

Product Description

The ISCAR 6403993 is a chamfering boring bar designed for internal chamfering operations on small-diameter bores. Constructed from submicron solid carbide with a TiAlN and TiN finish coating and manufactured to grade IC908, this bar delivers consistent edge retention and wear resistance in demanding cutting conditions. It accommodates a minimum bore diameter of 0.1969 inches (5.00 mm) and reaches a maximum bore depth of 0.9449 inches (24.00 mm). The 20-degree bar end angle and 0.0020-inch corner radius make it well suited for precision chamfer work in tight bore geometries. Overall length is 1.5748 inches (40.00 mm). Installed by machinists and toolroom professionals in CNC turning and boring applications.

This chamfering boring bar is intended for use in small-bore internal chamfering and finishing operations on CNC lathes and boring machines. The right-hand cutting direction suits standard spindle rotation setups. With a shank diameter of 5.00 mm and a compact overall length of 1.5748 inches, the bar fits collet-style toolholding systems commonly used in Swiss-style and small-part turning centers. It is appropriate for production and repair environments where precise internal chamfer geometry is required on metal workpieces.

Key Features

• Submicron solid carbide construction for superior hardness and edge retention
• IC908 manufacturer grade with TiAlN and TiN dual-layer finish coating for extended tool life in interrupted and continuous cuts
• 0.1969 inches (5.00 mm) minimum bore diameter enables work in very small bores
• 20-degree bar end angle for consistent chamfer geometry
• 0.0020-inch corner radius for controlled edge blending
• Right-hand cut orientation for standard CNC lathe setups

Compatibility

Designed as an OEM-style replacement boring bar for small-bore internal chamfering applications using 5.00 mm shank collet toolholding systems on CNC turning and boring equipment.

Installation Notes

Installation should be performed by a qualified machinist following the machine tool manufacturer's toolholding specifications. Secure the shank fully within the collet or toolholder before operation and verify runout before cutting. Power down and lock out the machine spindle before inserting or removing the bar. Do not exceed the recommended bore depth of 0.9449 inches to avoid tool deflection or breakage.