Kennametal 2429570 Carbide Thread Mill Insert Nptf 18 Tpi

Product Description

The KENNAMETAL 2429570 is a carbide thread mill insert designed for precision thread milling in both internal and external applications. Manufactured to the NPTF thread standard with 18 teeth per inch, this insert carries the KC635M grade designation and features a TiAlN coating applied via PVD process. The TiAlN finish delivers heat resistance and wear protection suited to demanding thread milling operations in ferrous and non-ferrous materials. With an inscribed circle diameter of 0.25 inches, the insert follows the STN insert style and is sized for use in compatible thread mill toolholders. Installation is performed by machinists and CNC tooling specialists working with tapered pipe thread applications.

This insert is used in thread milling operations requiring NPTF tapered pipe thread profiles at 18 TPI. It supports both internal and external threading, making it applicable across a range of workpiece configurations. Typical applications include machining pipe thread connections in hydraulic, pneumatic, and fluid system components. The NPTF standard ensures pressure-tight thread engagement without the need for sealants when properly machined. This insert is well suited for production environments where consistent thread form and tool life are priorities.

Key Features

• KC635M carbide grade with PVD-applied TiAlN coating for extended wear life
• NPTF thread standard for pressure-tight tapered pipe thread profiles
• Supports both internal and external thread milling in a single insert style
• 18 teeth per inch for fine-pitch tapered pipe thread production
• 0.25 inch inscribed circle diameter in the STN insert style
• Non-conical geometry for straightforward toolholder seating

Compatibility

Designed as an OEM-style replacement and standard insert for thread mill toolholders accepting STN-style inserts with a 0.25 inch inscribed circle diameter.

Installation Notes

Thread mill inserts are installed and serviced by machinists and CNC setup technicians. Ensure the machine spindle is fully stopped and the toolholder is secured in a vise or fixture before replacing inserts. Follow the toolholder manufacturer's torque guidelines for insert clamping screws. Inspect the insert seat and clamping mechanism for debris or wear before seating a new insert.