Iscar 6403986 Chamfering Boring Bar Submicron Carbide

Product Description

The ISCAR 6403986 is a chamfering boring bar designed for precision internal chamfering operations on small-bore workpieces. Machined from submicron-grade solid carbide with a TiAlN and TiN finish coating and an ISCAR IC908 manufacturer grade, this bar delivers consistent edge integrity and wear resistance in demanding cutting conditions. It accepts a minimum bore diameter of 0.1102 inches and reaches a maximum bore depth of 0.3543 inches, with an overall length of 0.9449 inches. The right-hand cutting direction and 20-degree bar end angle suit standard CNC turning and boring applications requiring clean chamfer geometry on tight-tolerance bores.

This chamfering boring bar is suited for use in CNC lathes and turning centers where internal chamfering of small-diameter bores is required. The 0.1102 inch minimum bore capability makes it appropriate for precision components in industries such as aerospace, medical, and general machining where bore entry geometry must be held to close tolerances. It is installed and used by machinists and CNC operators working with solid carbide tooling systems. The 4.00 mm shank diameter fits compatible boring bar tool holders designed for that shank size.

Key Features

• Submicron solid carbide construction for extended tool life in hardened and abrasive materials
• TiAlN and TiN dual finish coating for heat resistance and reduced friction at the cutting edge
• IC908 manufacturer grade optimized for a broad range of ISO material groups
• 20-degree bar end angle produces consistent chamfer geometry in small blind and through bores
• 0.0010 inch corner radius for controlled edge definition on precision chamfer features
• Right-hand cutting direction compatible with standard CNC turning center spindle orientation

Compatibility

Designed for use with boring bar tool holders accepting a 4.00 mm shank diameter. Confirm holder bore size and clamping method before installation. No specific machine model compatibility is stated by the manufacturer for this part.

Installation Notes

Installation is performed by qualified machinists or CNC setup technicians. Ensure the machine spindle is fully stopped and the tool turret or holder is de-energized before mounting or removing the bar. Confirm shank seating depth and holder clamping torque per the tool holder manufacturer specifications. Inspect the cutting edge for coating integrity before each use, as solid carbide bars are brittle and susceptible to chipping if mishandled or improperly stored.