Kennametal 4176032 Threading Insert NAS3R6 KCU10 Carbide

Product Description

The KENNAMETAL 4176032 is a carbide threading insert designed for cutting Stub Acme threads in both internal and external applications. Built to the NAS insert style and manufactured in KENNAMETAL grade KCU10, this insert features a physical vapor deposition (PVD)-applied aluminum titanium nitride (AlTiN) finish that extends tool life in demanding cutting conditions. It carries a 6 TPI internal pitch and a 29-degree included angle, making it purpose-built for Stub Acme thread profiles. Part of the Top Notch series, the insert is sized at Insert Size 3 and configured for right-hand operation. Machinists and tool room technicians use this insert in CNC lathes and manual turning centers where consistent thread geometry and surface finish are required.

This insert is suited for threading operations on ferrous and non-ferrous workpieces in job shop, production machining, and maintenance machining environments. The right-hand configuration covers the majority of standard Stub Acme threading setups encountered in power transmission, lead screw, and actuation component manufacturing. It seats into Top Notch series toolholders designed to accept Size 3 inserts.

Key Features

• Carbide substrate with AlTiN finish applied via PVD process for heat and wear resistance
• NAS insert style, Size 3, compatible with Top Notch series toolholders
• Cuts Stub Acme thread profile at 6 TPI with a 29-degree included angle
• Right-hand configuration for standard threading direction
• Handles both internal and external thread cutting applications
• Corner radius of 0.005 inches (0.13 mm) and cutting tip width of 0.0652 inches (1.66 mm)

Compatibility

Designed for use with Top Notch series toolholders accepting NAS-style Size 3 threading inserts. Suitable for internal and external Stub Acme thread cutting applications.

Installation Notes

Installation should be performed by a qualified machinist with the machine powered down and in a locked-out state before insert changeover. Seat the insert fully and evenly in the toolholder pocket and torque the clamping screw according to the toolholder manufacturer specifications. Verify thread profile and pitch with a thread gauge before running production cuts. Inspect the insert seating surface and pocket for chips or debris prior to installation.