Kennametal 1796524 Threading Insert NAS3R12 KC5025 Carbide

Product Description

The KENNAMETAL 1796524 is a carbide threading insert designed for cutting Stub Acme thread forms at 12 threads per inch (TPI). Part of the Top Notch series, it carries a PVD-applied TiAlN finish that resists heat and wear during interrupted or continuous threading passes. The insert handles both internal and external threading in right-hand orientation. With a 29-degree included angle and a cutting tip width of 0.0327 inches, it produces accurate Stub Acme profiles in a single-point threading operation. Machinists and CNC lathe operators working in production or job-shop environments are the primary users of this insert.

This insert suits applications where Stub Acme thread forms are required on shafts, lead screws, actuator rods, or similar components. It is rated for material grades C2 and C6, covering a broad range of steels and cast irons commonly encountered in general machining. The Top Notch insert style seats into compatible Top Notch toolholders. Right-hand cutting geometry means it advances toward the chuck in standard threading cycles.

Key Features

• Stub Acme thread form at 12 TPI with a 29-degree included angle
• TiAlN PVD coating for thermal resistance and extended tool life
• Handles both internal and external threading operations
• Right-hand cutting orientation for standard CNC and manual lathe use
• Insert size 3, Top Notch series seating geometry
• Corner radius of 0.0330 inches for controlled root form

Compatibility

Designed for use in Top Notch series toolholders that accept size 3 NAS-style inserts. Consult the toolholder specification to confirm correct pocket geometry before mounting.

Installation Notes

Threading inserts should be installed by a qualified machinist following the toolholder manufacturer's seating and clamping procedure. Power down and lock out the machine spindle before changing inserts. Inspect the toolholder pocket for chips or wear before seating the insert, as debris can affect insert orientation and thread accuracy. Do not exceed the toolholder's rated depth-of-cut or feed recommendations for threading operations.