Iscar 6403940 Single Point Threading Tool Internal Carbide

Product Description

The ISCAR 6403940 is a solid carbide single point threading tool designed for internal thread cutting operations. It handles a thread range of 36 to 48 TPI with a 60-degree profile angle, making it suitable for fine-pitch internal threading on small-diameter bores. The minimum threading diameter is 0.126 inches, and the cutting depth reaches 0.3937 inches. Overall length is 0.945 inches, with a projection from edge of 0.02 inches. The tool carries a TiAlN and TiN coating for wear resistance and thermal stability during cutting. This tool is installed by machinists and CNC lathe operators working on precision threading applications.

This threading tool is used in internal threading operations on small bores, typically in precision machined components such as fittings, fasteners, and instrument housings. It suits right-hand thread applications with a pitch range of 0.50 mm to 0.75 mm. The solid carbide construction supports use in both manual and CNC lathe setups where consistent thread form and dimensional accuracy are required. The TiAlN and TiN finish supports extended tool life in ferrous and non-ferrous materials.

Key Features

• Solid carbide construction for rigidity and wear resistance in small-bore internal threading
• 60-degree profile angle for standard unified and metric thread forms
• TPI range of 36 to 48 covers fine-pitch internal threads
• TiAlN and TiN dual coating improves thermal and abrasion resistance
• Minimum threading diameter of 0.126 inches suits small-bore applications
• Right-hand thread direction with no coolant-through requirement

Compatibility

Designed as an OEM-style replacement or direct-application solid carbide threading insert for internal single point threading operations on CNC and manual lathes accepting this tool geometry.

Installation Notes

This tool is installed by qualified machinists or CNC operators. Ensure the machine spindle is fully stopped and locked out before changing or setting tooling. Secure the tool firmly in the toolholder to the correct projection before beginning a threading pass. Verify thread pitch and TPI settings against the workpiece specification before initiating the cut.