Kennametal 1796543 Threading Insert NAS3L8 KC5025 Carbide

Product Description

The KENNAMETAL 1796543 is a carbide threading insert designed for precision thread-cutting applications on CNC lathes and manual turning centers. Manufactured in the NAS3L8 style with a KC5025 grade carbide substrate, this insert carries a PVD-applied TiAlN finish that extends tool life in both ferrous and non-ferrous threading operations. It targets Stub Acme thread forms at 8 threads per inch with a 29-degree included angle, and handles both internal and external thread profiles in a single left-hand insert geometry. The cutting tip measures 0.0476 inches wide, and the insert thickness is 0.1949 inches. Machinists and CNC operators working on Stub Acme thread profiles will find this insert purpose-built for that specification.

This insert is suited for production and job-shop environments requiring consistent Stub Acme thread forms on shafts, lead screws, or threaded bores. The left-hand orientation is required for right-hand-side threading operations on specific toolholder setups, as well as for reverse-thread applications. The Top Notch series designation indicates compatibility with Kennametal Top Notch toolholders designed to accept NAS-style inserts. It is installed and indexed by CNC machinists and tool-and-die professionals working to thread tolerances on lathes equipped with appropriate Top Notch holders.

Key Features

• KC5025 carbide grade with PVD TiAlN coating for extended wear resistance
• NAS insert style in Left Hand orientation for Stub Acme thread forms
• 8 TPI internal pitch with 29-degree included angle
• Handles both internal and external thread cutting in a single geometry
• Cutting tip width of 0.0476 inches for precise Stub Acme thread profile
• Top Notch series for secure, repeatable indexing in compatible toolholders

Compatibility

Designed for use with Kennametal Top Notch series toolholders accepting NAS-style threading inserts. Compatible with C2 and C6 material grade classifications. Verify toolholder designation and insert pocket orientation before ordering.

Installation Notes

This insert is installed and indexed by qualified machinists or CNC operators. Power down and lock out the machine spindle before changing inserts. Use the appropriate torque wrench and insert-clamping hardware specified for the Top Notch toolholder to avoid micro-fractures at the cutting tip. Inspect the insert pocket for chips or debris before seating the new insert, and confirm thread-form alignment with a thread gauge after the first test pass.