Iscar 6403679 Boring Bar 0.268 in Min Bore Solid Carbide

Product Description

The ISCAR 6403679 is a solid carbide boring bar designed for internal turning and precision bore finishing on CNC lathes and manual turning centers. It cuts in a right-hand direction and accepts a minimum bore diameter of 0.268 inches, reaching a maximum bore depth of 1.339 inches. The bar measures 1.9700 inches in overall length with a 7.00 mm shank diameter. A TiN finish coating is applied to improve wear resistance and extend tool life in production environments. The 0.006-inch corner radius supports finish-pass work where tight tolerances and surface finish matter. Machinists and CNC operators install this bar as a direct OEM-grade tooling component.

This boring bar is suited for small-bore internal turning applications in precision machining shops, tool rooms, and production turning cells. Its compact geometry and solid carbide construction make it appropriate for both ferrous and non-ferrous workpiece materials where rigidity and dimensional accuracy are required. The ISCAR IC228 manufacturer grade designation indicates it is optimized for specific cutting conditions in steel and similar materials. It is sold individually and is compatible with standard boring bar holders sized for a 7.00 mm shank.

Key Features

• Solid carbide construction for rigidity and vibration damping in small-bore applications
• Minimum bore diameter of 0.268 inches for tight-clearance internal turning
• Maximum bore depth of 1.339 inches suitable for through and blind bore work
• TiN finish coating for improved wear resistance and reduced tool-workpiece friction
• 0.006-inch corner radius for finish-pass dimensional control
• Right-hand cutting direction for standard lathe setup

Compatibility

Designed for use with boring bar holders accepting a 7.00 mm shank diameter. Confirm holder bore size and clamping style before installation.

Installation Notes

This tool is installed by a machinist or CNC operator into a compatible boring bar holder or turret station. Ensure the machine spindle is fully stopped and the machine is in an energy-isolated state before changing tooling. Verify shank diameter clearance and holder clamping torque per the machine tool manufacturer specifications. Do not exceed the recommended overhang length for the shank diameter, as excessive overhang increases deflection and reduces bore accuracy.