Kennametal 4175984 Threading Insert NTF3L KCU10 Carbide

Product Description

The KENNAMETAL 4175984 is a carbide threading insert in the Top Notch series, designed for both internal and external thread cutting applications. It carries the NTF3L insert style designation and is manufactured to the KCU10 grade with a PVD-applied AlTiN finish. The insert covers a partial profile 60-degree thread standard and handles external pitches from 0.60 to 2.50 mm (10 to 44 TPI) and internal pitches from 1.00 to 2.50 mm (9 to 24 TPI). It is a left-hand insert suited for machinists and toolroom operators working with CNC lathes or manual turning centers where thread-form accuracy is critical.

This insert is used in precision threading operations across metalworking environments, including production machining shops, maintenance and repair facilities, and job shops. Its partial profile 60-degree geometry makes it appropriate for cutting unified and metric threads on a range of workpiece materials. The AlTiN PVD coating supports dry or near-dry cutting conditions and extends tool life when threading ferrous and hardened materials. It fits into compatible Top Notch threading toolholders designed for size 3 inserts.

Key Features

• Carbide substrate with PVD AlTiN finish for extended wear resistance in ferrous threading
• Partial profile 60-degree thread standard covers both unified and metric thread forms
• External pitch range: 0.60 to 2.50 mm (10 to 44 TPI)
• Internal pitch range: 1.00 to 2.50 mm (9 to 24 TPI)
• Left-hand insert orientation for left-hand thread cutting operations
• Insert size 3 with a corner radius of 0.08 mm (0.0031 inches) for precise thread root geometry

Compatibility

Designed for use with Top Notch series threading toolholders accepting size 3 NTF-style inserts for internal and external threading applications.

Installation Notes

Installation should be performed by a qualified machinist following the toolholder manufacturer's clamping procedure for Top Notch inserts. Ensure the machine spindle is fully stopped and the toolholder is secure before seating or removing the insert. Verify correct insert orientation for left-hand threading before engaging the cut. Consult the toolholder documentation for recommended clamping torque and seating confirmation.