Kennametal 4176023 Threading Insert KCU10 Carbide Altin Acme

Product Description

The KENNAMETAL 4176023 is a carbide threading insert designed for cutting Acme thread forms in both internal and external applications. Manufactured to the Top Notch series standard, this right-hand insert carries the KCU10 grade with a PVD-applied AlTiN finish that supports tool life in demanding threading operations. The insert delivers a 5 TPI pitch with a 29-degree included angle and a corner radius of 0.0050 inches, making it suited for precision Acme thread profiles. At 0.1949 inches thick and 0.0689 inches at the cutting tip width, it fits standard Top Notch toolholders used by machinists and CNC lathe operators across production and job-shop environments.

This insert is used in turning operations where Acme threads are required, commonly found in lead screws, power transmission components, and motion control assemblies. Its right-hand cutting geometry and dual-capability for internal and external threading make it a practical choice for shops that handle a range of threading work on lathes and turning centers. The AlTiN coating supports performance in alloy steels and other materials where heat resistance at the cutting edge is a factor.

Key Features

• KCU10 carbide grade with PVD-applied AlTiN finish for improved wear resistance
• Acme thread form, 5 TPI internal pitch, 29-degree included angle
• Right-hand cutting orientation for standard lathe threading setups
• Capable of both internal and external thread cutting
• Corner radius of 0.0050 inches for accurate Acme thread root profile
• Top Notch series insert for use with compatible Top Notch toolholders

Compatibility

Designed for use with Top Notch series threading toolholders that accept size 3 inserts. Suitable for Acme thread applications on standard CNC and manual lathes.

Installation Notes

Installation and replacement should be performed by a qualified machinist with the machine powered down and the spindle locked. Seat the insert fully into the toolholder pocket and secure the clamping mechanism according to the toolholder manufacturer specifications before resuming cutting operations. Inspect the insert edge for chipping before each use and replace at the first sign of wear to maintain thread accuracy.