Iscar 6403992 Chamfering Boring Bar Submicron Carbide

Product Description

The ISCAR 6403992 is a chamfering boring bar designed for internal chamfering and angular boring operations in precision machining applications. Constructed from submicron solid carbide in manufacturer grade IC908, this bar delivers consistent edge integrity and wear resistance under demanding cutting conditions. It features a TiAlN and TiN finish coating to extend tool life in ferrous and hardened materials. With a minimum bore diameter of 0.1969 inches and an overall length of 1.1811 inches, the 6403992 is sized for small-bore work requiring tight tolerances. The 0.002-inch corner radius and 20-degree bar end angle define the chamfer geometry and suit precision deburring and chamfering passes.

This chamfering boring bar is suited for CNC turning centers and boring machines handling small-diameter internal features. It is commonly applied in job shops, aerospace component machining, and precision parts manufacturing where repeatable chamfer angles are required on bored holes. The right-hand cutting direction makes it compatible with standard spindle rotation on most CNC lathes. Maximum bore depth reaches 0.5512 inches, making it appropriate for shallow internal chamfer and countersink operations in small-bore workpieces.

Key Features

• Submicron solid carbide construction in IC908 grade for high hardness and edge retention
• TiAlN and TiN dual finish coating extends tool life in ferrous and hardened materials
• 0.1969-inch minimum bore diameter for small-bore internal chamfering
• 20-degree bar end angle with 0.002-inch corner radius for defined chamfer geometry
• Right-hand cutting direction compatible with standard CNC lathe spindle rotation
• Compact 1.1811-inch overall length suited for tight-clearance boring setups

Compatibility

Designed as an OEM-style replacement and standard tooling solution for CNC turning centers and boring machines capable of accepting a 5.00 mm shank diameter boring bar with right-hand cut geometry.

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 boring head is locked out before inserting or removing the bar. Seat the shank securely to the specified depth in the tool holder to prevent deflection during the cut. Verify chamfer angle and depth settings against part print before initiating the first pass.