Iscar 6403931 Corner Radius Boring Bar Solid Carbide

Product Description

The ISCAR 6403931 is a solid carbide corner radius boring bar designed for internal turning and small-bore finishing operations on CNC lathes and machining centers. It cuts in a right-hand direction and features a TiAlN and TiN dual finish coating paired with ISCAR grade IC1008 carbide for wear resistance in hard and abrasive workpiece materials. The bar accepts a minimum bore diameter of 0.315 inches (8.00 mm), reaches a maximum bore depth of 0.0787 inches (2.00 mm), and carries a 0.0197-inch corner radius for controlled edge blending on tight-tolerance bores. Overall length is 1.378 inches (35.00 mm). This is a single-piece solid carbide tool, not an indexable insert system.

This boring bar suits precision internal machining where small bore diameters and shallow depths are required, such as hydraulic valve bodies, medical components, aerospace fittings, and small pneumatic housings. The 7.00 mm shank diameter makes it compatible with standard small-bore toolholding systems. It is intended for use by machinists and CNC operators working with close-tolerance bores in steel, stainless, and other hard materials where the IC1008 grade and TiAlN coating provide the necessary edge retention.

Key Features

• Solid carbide construction for rigidity and vibration resistance in small-bore applications
• TiAlN and TiN dual coating for extended tool life in hard and abrasive materials
• ISCAR IC1008 carbide grade suited for continuous and light interrupted cuts
• 0.0197-inch corner radius for controlled edge blending and surface finish consistency
• Right-hand cutting direction for standard CNC lathe and boring mill setups
• Compact 1.378-inch overall length minimizes overhang in tight bore entries

Compatibility

Designed for use in toolholding systems accepting a 7.00 mm shank diameter. Consult toolholder specifications to confirm bore diameter and shank retention requirements before installation.

Installation Notes

Installation and setup should be performed by a qualified machinist or CNC operator. Power down and lock out the machine spindle before mounting or removing the boring bar. Ensure the shank is fully seated and clamped to the toolholder manufacturer's specified torque range as published in the toolholder documentation. Verify runout with a dial indicator before taking the first cut to avoid premature tool wear or bore damage.