Kennametal 1796531 Threading Insert Stub Acme 8 Tpi Carbide

Product Description

The KENNAMETAL 1796531 is a carbide threading insert designed for cutting Stub Acme thread forms on both internal and external applications. It carries the KC5025 manufacturer grade with a TiAlN finish applied via PVD coating, making it well-suited for demanding threading operations where wear resistance and edge integrity are critical. The insert follows the NAS style in the Top Notch series, with a right-hand cutting orientation and an included angle of 29 degrees. At 8 threads per inch, it targets coarser Stub Acme pitches common in power-transmission and motion-control components. Machinists and CNC operators working in job shops or production environments will find this insert fits standard Top Notch toolholders.

This insert is used in turning and threading operations where Stub Acme thread profiles are required. The Stub Acme thread standard is common in lead screws, linear actuators, and similar mechanical assemblies. The insert handles both internal and external thread cutting in a single grade, reducing tooling inventory. It is sized as an Insert Size 3 and suits applications in ferrous and non-ferrous materials within the C2 and C6 material grade ranges.

Key Features

• KC5025 carbide grade with PVD-applied TiAlN coating for extended tool life
• Cuts Stub Acme thread form at 8 TPI with a 29-degree included angle
• Right-hand insert orientation for standard threading direction
• Suitable for both internal and external thread profiles
• Top Notch series for compatibility with Top Notch toolholding systems
• Insert Size 3 with a tip width of 0.0476 inches and tip-to-top height of 0.1492 inches

Compatibility

Designed for use with Top Notch series toolholders that accept NAS-style Size 3 threading inserts. Verify toolholder seat geometry and insert size designation before installation.

Installation Notes

Threading inserts of this type are installed and replaced by qualified machinists following standard CNC toolroom procedures. Power down and lock out the machine spindle before seating or removing the insert. Use the correct torque wrench and insert screw specified by the toolholder manufacturer - do not over-tighten, as carbide inserts are brittle and can crack under improper clamping force. Inspect the insert seat and clamp for chips or debris before each installation.