Kennametal 4176181 Threading Insert NT1L KCU10 Carbide

Product Description

The KENNAMETAL 4176181 is a carbide threading insert engineered for internal thread-cutting operations on CNC lathes and turning centers. Manufactured in the NT1L style with KCU10 grade carbide and an AlTiN finish applied via PVD coating, this insert delivers consistent performance in partial profile 60-degree thread forms. The left-hand configuration suits applications where conventional right-hand tooling is not compatible with the setup. The AlTiN coating improves wear resistance and extends tool life in ferrous and hardened materials. It seats into Top Notch compatible toolholders and is sized for precision thread turning at the insert size 1 standard.

This insert is intended for internal threading applications covering a pitch range of 1.00 to 2.00 mm and 12 to 24 TPI. It is used in machine shops, production turning environments, and tool rooms where consistent thread geometry is required on bores and internal features. The 60-degree included angle makes it suitable for unified and metric partial profile threading. Licensed machinists and CNC operators are the primary installers. Sold individually with a minimum order quantity of 5 units per transaction.

Key Features

• KCU10 grade carbide with PVD-applied AlTiN coating for extended wear life
• Partial profile 60-degree thread form covers both metric and unified thread families
• Left-hand insert orientation for specialized internal threading setups
• Internal pitch range: 1.00 to 2.00 mm and 12 to 24 TPI
• NT1L Top Notch insert style for secure, repeatable seating in compatible toolholders
• Corner radius of 0.08 mm (0.0031 inches) for precise thread root geometry

Compatibility

Designed for use with Top Notch series toolholders accepting NT insert style, size 1 inserts. Verify toolholder designation and insert pocket geometry before installation.

Installation Notes

Installation is performed by qualified machinists or CNC tooling technicians. Power down and lock out the machine spindle before changing inserts. Use the correct torque wrench and clamping screw per the toolholder manufacturer specification to avoid insert rocking or micro-movement during cuts. Inspect the insert pocket for chips or debris before seating the new insert, as contamination in the pocket affects thread accuracy.