Kennametal 4176192 Threading Insert KCU10 Carbide 10 Tpi

Product Description

The KENNAMETAL 4176192 is a left-hand external threading insert designed for precision UN thread form cutting on CNC lathes and threading applications. Built to the Top Notch insert system standard, it carries the NTC3L10E geometry and KCU10 carbide grade with a PVD-applied AlTiN finish. The insert produces a 60-degree included angle thread profile at 10 threads per inch (TPI) and features a corner radius of 0.0124 inches (0.32 mm). The KCU10 grade is suited for threading operations where edge toughness and coating wear resistance are priorities. This insert is installed by machinists and CNC operators working in production or job-shop turning environments.

This insert is used for external left-hand UN thread cutting in turning center and lathe applications. The Top Notch series toolholder system is a common platform in production threading setups. The AlTiN PVD coating provides thermal resistance during dry or semi-dry threading passes. At 10 TPI, it covers standard UN thread pitches used across general mechanical fastener and component manufacturing. It is appropriate for both production runs and prototype threading work where a left-hand thread form is required.

Key Features

• KCU10 carbide grade with PVD AlTiN finish for wear and thermal resistance
• Left-hand external thread orientation for left-hand UN thread cutting
• 10 TPI pitch with a 60-degree included angle per UN thread standard
• Corner radius of 0.0124 inches (0.32 mm) for accurate thread root form
• Top Notch (NTC) insert series for compatibility with Top Notch toolholders
• Insert Size 3 with a thickness of 0.195 inches (4.95 mm)

Compatibility

Designed for use with Top Notch series threading toolholders that accept NTC Size 3 inserts. Specific toolholder compatibility should be verified against KENNAMETAL Top Notch system documentation prior to installation.

Installation Notes

Threading inserts of this type are installed and changed by machinists or CNC operators following standard lathe lockout and machine-stop procedures before any insert seat contact. The insert must be seated fully and secured per the toolholder manufacturer torque and clamping requirements. Verify insert orientation for left-hand thread direction before initiating a threading cycle. Dispose of worn carbide inserts in accordance with applicable facility and environmental guidelines.