Kennametal 1796426 Threading Insert 18 Tpi Carbide Tialn

Product Description

The KENNAMETAL 1796426 is a carbide threading insert designed for external thread-cutting operations on CNC lathes and turning centers. Manufactured to the NJK3009R18 profile in the Top Notch series, this right-hand insert is coated with TiAlN via a PVD process, providing heat resistance and extended tool life in demanding threading applications. It cuts UNJ-standard external threads at 18 TPI with a 60-degree included angle, making it suited for aerospace and precision machining work where UNJ thread form tolerances are required. Licensed machinists and CNC operators install this insert as part of a qualified Top Notch toolholder system.

This insert is intended for external threading on materials corresponding to C2 and C6 carbide grade classifications, covering a broad range of steels, cast irons, and non-ferrous alloys. The Top Notch series is a common platform in production turning environments, both in job shops and high-volume machining cells. It is appropriate for applications where consistent thread form, chip control, and insert indexability are priorities. The KC5025 grade with TiAlN coating is selected for its balance of toughness and wear resistance at moderate to high cutting speeds.

Key Features

• 18 TPI external UNJ thread form with 60-degree included angle
• KC5025 carbide grade with PVD-applied TiAlN finish for elevated wear resistance
• Right-hand cutting geometry, NJK insert style, Top Notch series platform
• Corner radius of 0.0087 inches (0.22 mm) for controlled thread root profile
• Insert size 3009 with thickness of 0.1949 inches (4.95 mm)
• Tip-to-top height of 0.1409 inches (3.58 mm) for precise toolholder seating

Compatibility

Designed as an OEM-style replacement insert for Top Notch series external threading toolholders accepting the NJK3009 insert size and right-hand geometry.

Installation Notes

Installation is performed by qualified machinists or CNC tooling technicians. Ensure the machine spindle is fully stopped and the toolholder is clear of the workpiece before indexing or replacing the insert. Use the appropriate torque wrench and clamping hardware specified for the Top Notch toolholder system to secure the insert without cracking the carbide substrate. Verify thread form and pitch with a thread gauge after the first test pass before committing to production runs.