Iscar 6403808 Chamfering Boring Bar Solid Carbide

Product Description

The ISCAR 6403808 is a solid carbide chamfering boring bar designed for internal chamfering operations in precision machining applications. Built for left-hand cutting, it features a minimum bore diameter of 0.1575 inches and a maximum bore depth of 0.5906 inches, making it well suited for small-diameter, tight-tolerance work. The bar measures 1.1811 inches in overall length with a 0.0039-inch corner radius. A TiAlN finish coating improves wear resistance and heat tolerance during cutting. Manufacturer grade IC908 indicates a fine-grain carbide substrate optimized for steel and stainless steel machining at moderate to high cutting speeds.

This chamfering boring bar is intended for use in CNC lathes and turning centers where small-bore internal chamfering is required. Its compact geometry and 4.00 mm shank diameter allow it to reach into confined bores where larger tooling cannot. It is typically installed by machinists and tooling technicians working in precision component manufacturing, aerospace, medical device, and general metalworking environments. The left-hand cutting direction makes it appropriate for specific spindle rotation and tooling orientation requirements on the machine setup.

Key Features

• Left-hand cutting direction for dedicated machine setups requiring reverse-rotation or specific tool orientation
• Solid carbide construction with IC908 grade substrate for rigidity and wear resistance in small-bore applications
• TiAlN finish coating enhances surface hardness and thermal resistance during high-speed cutting
• Minimum bore diameter of 0.1575 inches enables access to very small internal features
• 0.0039-inch corner radius for controlled chamfer geometry and edge definition
• Compact 1.1811-inch overall length designed for tooling clearance in tight setups

Compatibility

Designed as an OEM-style solid carbide chamfering boring bar suitable for use in standard boring bar holders and CNC turning center tool blocks accommodating a 4.00 mm shank diameter.

Installation Notes

Installation should be performed by a qualified machinist or tooling technician. Ensure the machine spindle is fully stopped and the machine is in a safe lockout state before installing or changing tooling. Confirm that the tool holder bore and clamping mechanism match the 4.00 mm shank diameter before seating the bar. Verify cutting direction against the machine spindle rotation and programmed toolpath before initiating a cut.