Iscar 6403843 Solid Carbide Boring Bar 0.2677 in Min Bore

Product Description

The ISCAR 6403843 is a solid carbide boring bar designed for internal turning and bore finishing operations on CNC lathes and machining centers. With a minimum bore diameter of 0.2677 inches (6.80 mm) and a maximum bore depth of 0.748 inches (19.00 mm), this bar handles small-diameter, shallow-bore applications where rigidity and precision are critical. The 7.00 mm shank diameter and 35.00 mm overall length make it suited for compact toolholding setups. A TiAlN finish coating increases surface hardness and heat resistance, extending tool life in ferrous and hardened materials. The IC908 manufacturer grade designates a fine-grain carbide substrate optimized for consistent performance in interrupted and continuous cuts. Machinists and CNC programmers select this bar for tight-tolerance bore work in production environments.

This boring bar is appropriate for small-bore internal machining in both production and job-shop settings. Its right-hand cut orientation suits standard lathe spindle rotation. The compact 35.00 mm overall length fits toolholders with minimal overhang requirements, reducing vibration in precision bore operations. It is typically installed by machinists and CNC operators working on turned components requiring controlled diameter and finish in bores as small as 0.2677 inches.

Key Features

• Minimum bore diameter of 0.2677 inches (6.80 mm) for small-bore internal turning
• Maximum bore depth of 0.748 inches (19.00 mm)
• Solid carbide construction for rigidity and dimensional stability
• TiAlN finish coating for elevated heat resistance and extended tool life
• IC908 carbide grade suited to ferrous and hardened workpiece materials
• Right-hand cut with 7.00 mm shank diameter and 35.00 mm overall length

Compatibility

Designed as an OEM-style solid carbide boring bar for use in standard 7.00 mm bore toolholders on CNC lathes and machining centers requiring right-hand internal turning capability.

Installation Notes

Installation should be performed by a qualified machinist following shop safety procedures. Secure the shank fully in the toolholder to the recommended clamping depth before operation, and verify runout with an indicator before cutting. Ensure the machine spindle is fully stopped and the control is in an e-stop or locked state before mounting or removing the bar. Do not exceed the maximum bore depth of 0.748 inches to avoid excessive tool deflection or breakage.