Iscar 6403987 Chamfering Boring Bar Submicron Carbide

Product Description

The ISCAR 6403987 is a chamfering boring bar designed for precision internal chamfering and bore finishing operations on CNC and manual machining centers. Manufactured from submicron solid carbide with a TiAlN and TiN finish coating, it accepts minimum bore diameters starting at 0.1102 inches (2.80 mm) and reaches a maximum bore depth of 0.5906 inches (15.00 mm). The 20-degree bar end angle and 0.001-inch corner radius support consistent chamfer geometry in tight-tolerance applications. Weighing just 0.022 pounds, this bar is suited for machinists and tooling specialists working in small-bore, high-precision environments.

This chamfering boring bar is applicable to small-bore internal chamfering operations in precision machining environments, including aerospace, medical, and general industrial manufacturing. Its compact overall length of 1.1811 inches (30.00 mm) and 4.00 mm shank diameter make it well-suited for CNC turning centers and boring mills where access to shallow, small-diameter bores is required. The right-hand cut orientation is the standard configuration for most conventional spindle setups. Tooling engineers and machinists specifying ISCAR IC908-grade carbide tooling will find this bar consistent with that grade family.

Key Features

• Submicron solid carbide construction with IC908 manufacturer grade for wear resistance and edge stability
• TiAlN and TiN dual finish coating for extended tool life in ferrous and hardened materials
• Minimum bore diameter of 0.1102 inches (2.80 mm) enables work in very small bore openings
• 20-degree bar end angle with 0.001-inch corner radius for precise chamfer geometry
• Right-hand cut orientation compatible with standard CNC spindle rotation
• Compact 1.1811-inch overall length suits shallow-reach boring applications

Compatibility

Designed as an OEM-style solid carbide chamfering boring bar compatible with tool holders accepting a 4.00 mm shank diameter in standard CNC turning and boring applications.

Installation Notes

Installation should be performed by a qualified machinist or tooling technician. Ensure the machine spindle is fully stopped and the tool turret or holder is de-energized before inserting or removing the bar. Verify shank seating and runout with a dial indicator before production cuts. Follow the machine tool manufacturer guidelines and applicable shop safety procedures when setting tool offsets and cut parameters.