Iscar 6403661 Corner Radius Boring Bar Solid Carbide

Product Description

The ISCAR 6403661 is a solid carbide corner radius boring bar designed for internal turning and precision bore finishing operations on CNC lathes and machining centers. With a minimum bore diameter of 0.2362 inches (6.00 mm) and a maximum bore depth of 0.748 inches, it handles tight-tolerance small-bore work where rigidity and dimensional accuracy are critical. The 0.0079-inch corner radius produces a controlled blend at the base of the bore. A TiCN and TiN dual-layer finish coating reduces tool wear and supports higher cutting speeds. This bar is intended for use by machinists and toolroom technicians working in production or job-shop environments.

The 6403661 is suited for right-hand internal boring passes on ferrous and non-ferrous materials in both production and precision machining applications. Its compact 1.378-inch overall length and 6.00 mm shank diameter make it appropriate for small-bore work on Swiss-type lathes, turret lathes, and similar machine configurations where clearance and reach are constrained. The ISCAR IC228 manufacturer grade is formulated for general-purpose internal turning at moderate to high cutting speeds.

Key Features

• Solid carbide construction for maximum rigidity in small-bore applications
• TiCN and TiN dual-layer coating extends tool life and supports elevated surface speeds
• 0.0079-inch corner radius for controlled finish at bore base
• Right-hand cutting direction for standard CNC lathe and machining center setups
• ISCAR IC228 grade optimized for general-purpose internal turning
• 6.00 mm shank diameter fits standard small-bore toolholding systems

Compatibility

Designed for use with toolholding systems that accept a 6.00 mm shank diameter boring bar in right-hand internal turning configurations. No specific compatible machine models or replacement part numbers were provided in the product data.

Installation Notes

Installation should be performed by a qualified machinist or toolroom technician. Secure the shank fully in the toolholder to the recommended grip length before beginning any cutting operation, and verify shank clamp torque per the toolholder manufacturer specifications. Ensure the machine spindle is fully stopped and the control is in a safe state before changing or adjusting the boring bar. Inspect the cutting edge and coating for chips or wear before each use.