Kennametal 4176015 Threading Insert NA3L4 KCU10 Carbide

Product Description

The KENNAMETAL 4176015 is a carbide threading insert in the Top Notch series, designed for cutting Acme threads at 4 threads per inch (TPI). It carries a KCU10 manufacturer grade and features an AlTiN finish applied via PVD coating process. The insert is configured for left-hand operation and is compatible with both internal and external threading applications. With a 29-degree included angle and a corner radius of 0.0050 inches, it is engineered for controlled chip formation and consistent thread form on Acme-profile workpieces. Licensed machinists and CNC operators install this insert in Top Notch-compatible toolholders for precision threading on lathes and turning centers.

This insert is suited for threading operations on Acme-profile threads in both internal and external configurations. The left-hand orientation makes it appropriate for applications requiring reverse-hand thread cutting. At 4 TPI, it targets coarse Acme thread pitches common in lead screws, power screws, and linear motion components found in industrial and production machining environments. The KCU10 carbide grade with AlTiN PVD coating provides wear resistance across a range of ferrous and non-ferrous materials.

Key Features

• Carbide substrate with AlTiN finish via PVD coating process for extended wear resistance
• KCU10 manufacturer grade suited for threading operations on a range of workpiece materials
• Left-hand insert orientation for reverse-hand Acme thread cutting
• 29-degree included angle matched to Acme thread profile standard
• 4 TPI internal and external threading capability
• Insert Size 3 in the Top Notch series for use with compatible Top Notch toolholders

Compatibility

Designed for use with Top Notch series toolholders that accept Insert Size 3. Suitable for internal and external Acme thread forms at 4 TPI. Confirm toolholder compatibility with left-hand insert style NA before installation.

Installation Notes

This insert is installed and replaced by qualified machinists or CNC tooling technicians. Power down and lock out the machine before seating or removing the insert. Use the appropriate torx or clamp-style key specified by the toolholder manufacturer to secure the insert to the correct clamp torque per the toolholder documentation. Verify insert orientation and hand designation match the programmed toolpath before resuming cutting operations.