Kennametal 4176121 Threading Insert NT4L KCU10 Carbide

Product Description

The KENNAMETAL 4176121 is a carbide threading insert designed for both internal and external thread cutting operations. Featuring the NT4L insert style in the KCU10 manufacturer grade, this insert uses a partial profile 60-degree thread standard and is finished with an AlTiN coating applied via a PVD coating process. It handles external pitch ranges of 1.25 to 6.25 mm (4 to 20 TPI) and internal pitch ranges of 2.00 to 6.25 mm (4 to 12 TPI). This insert is part of the Kennametal Top Notch series and is suited for installation by machinists and CNC lathe operators performing precision threading work.

This insert is used in turning and threading applications where consistent thread form and tool life are required. Its left-hand orientation makes it appropriate for left-hand threading operations on both internal and external workpieces. The AlTiN PVD finish supports performance in a range of materials commonly encountered in production machining environments. The Top Notch series tooling system provides a well-established platform for indexable threading inserts used in industrial machining shops and job shops alike.

Key Features

• Carbide substrate with AlTiN finish applied via PVD process for enhanced wear resistance
• Left-hand insert orientation for left-hand threading operations
• Covers external pitch 1.25 to 6.25 mm (4 to 20 TPI) and internal pitch 2.00 to 6.25 mm (4 to 12 TPI)
• Partial profile 60-degree included angle for versatile thread form compatibility
• Part of the Kennametal Top Notch series indexable insert platform
• Corner radius of 0.17 mm (0.0067 inches) for precise thread root geometry

Compatibility

Designed for use with Kennametal Top Notch series threading toolholders that accept NT4L style inserts. Consult the Kennametal Top Notch system toolholder specifications to confirm proper seat and clamp compatibility before installation.

Installation Notes

This insert is installed by qualified machinists or CNC operators using appropriate Top Notch series toolholders. Power down and lock out the machine before indexing or replacing inserts. Handle carbide inserts with care to avoid chipping the cutting edges. Follow the toolholder manufacturer's clamping torque guidelines and verify insert seating before resuming cutting operations.