Iscar 6403946 Boring Bar 0.1181 in Min Bore Solid Carbide

Product Description

The ISCAR 6403946 is a solid carbide boring bar engineered for small-diameter internal turning operations. It features a minimum bore diameter of 0.1181 inches (3.00 mm) and a maximum bore depth of 0.394 inches, making it well suited for precision boring of tight, shallow bores where rigidity and cutting accuracy are critical. The bar carries a TiAlN finish coating and is manufactured to ISCAR grade IC908, a fine-grain carbide grade known for thermal resistance and edge retention in ferrous and difficult-to-machine materials. Overall length is 0.9449 inches. Installation is handled by machinists on CNC turning centers or manual lathes.

This boring bar is designed for right-hand cutting direction and targets applications requiring precise bore finishing in small-diameter workpieces. The 4.00 mm shank diameter suits compatible toolholders and boring head systems designed for that shank size. Typical applications include precision component machining in aerospace, medical, and general metalworking environments where close bore tolerances and repeatable surface finishes are required.

Key Features

• Minimum bore diameter of 0.1181 inches (3.00 mm) for small-bore internal turning
• Maximum bore depth of 0.394 inches suits shallow precision bore applications
• Solid carbide construction provides rigidity and vibration resistance in tight-bore conditions
• TiAlN finish coating improves thermal resistance and extends tool life in ferrous materials
• ISCAR grade IC908 carbide grade engineered for edge retention and heat resistance
• Right-hand cutting direction for standard CNC turning and manual lathe setups

Compatibility

Designed for use in toolholding systems and boring heads that accept a 4.00 mm shank diameter boring bar with right-hand cutting direction.

Installation Notes

Installation should be performed by a qualified machinist following standard toolroom practices. Ensure the machine spindle is fully stopped and the toolholder is properly torqued to the manufacturer specification for the holder being used before beginning any setup. Verify shank seating depth and overhang against the maximum bore depth to avoid tool deflection or contact with the bore wall. Follow applicable shop safety procedures when handling carbide tooling, as edges are sharp and the material is brittle.