Iscar 6403801 Boring Bar 0.079 in Min Bore Solid Carbide

Product Description

The ISCAR 6403801 is a submicron solid carbide boring bar designed for precision internal turning operations on small-diameter bores. It has a minimum bore diameter of 0.079 inches and a maximum bore depth of 0.157 inches, making it well suited for tight-tolerance work in compact bore profiles. The shank diameter is 4.00 mm and the overall length is 0.748 inches (19.00 mm). A dual-layer TiAlN and TiN finish coating is applied to the cutting edge, and the tool carries the IC908 manufacturer grade designation. The right-hand cut geometry and 0.002-inch corner radius are suited for finish boring passes requiring consistent surface quality. Machinists and tool-and-die professionals install this bar in CNC lathes and boring machines.

This boring bar is intended for precision internal machining applications where small bore diameters and strict depth control are required. It performs well in finishing operations on hardened steels, stainless alloys, and other difficult-to-machine materials where the IC908 grade and TiAlN coating provide thermal and wear resistance. The right-hand cutting direction suits standard lathe spindle configurations. It is typically used in production and job-shop environments running CNC turning centers that accommodate small-diameter tooling with 4.00 mm shank dimensions.

Key Features

• Submicron solid carbide construction for rigidity and wear resistance in small-bore applications
• Minimum bore diameter of 0.079 inches enables work on very small internal features
• Dual coating of TiAlN and TiN provides thermal resistance and extended tool life
• IC908 manufacturer grade designed for high-performance finishing on difficult materials
• 0.002-inch corner radius supports tight-tolerance surface finish requirements
• Right-hand cut geometry compatible with standard CNC turning center setups

Compatibility

Designed as an OEM-style replacement boring bar for CNC turning and boring applications requiring a 4.00 mm shank diameter and right-hand cut geometry in the IC908 grade family.

Installation Notes

This tooling should be installed by a qualified machinist following the machine tool manufacturer guidelines for boring bar setup and runout tolerance. Power down and lock out the machine spindle before seating or removing the bar. Confirm shank clamp torque against the toolholder specification rather than applying a generic value. Verify bore depth stop settings before running the first pass to prevent overtravel in confined bore geometries.