Kennametal 4176030 Threading Insert Size 3 KCU10 Carbide

Product Description

The KENNAMETAL 4176030 is a solid carbide threading insert designed for cutting Stub Acme thread forms on both internal and external workpieces. Manufactured to the NAS style in insert size 3, it carries a KCU10 grade designation and an AlTiN finish applied via PVD coating. The AlTiN coating improves wear resistance and thermal stability during high-speed threading operations. With a 29-degree included angle and 10 TPI internal pitch, this insert is suited to Stub Acme thread generation in production and maintenance machining environments. Installation and operation are performed by machinists and CNC tooling specialists working with compatible Top Notch toolholders.

This insert is intended for Stub Acme threading applications on lathes and turning centers equipped with Top Notch series toolholding systems. It handles both internal and external thread profiles in a right-hand cutting orientation. Typical use cases include lead screw manufacturing, repair threading, and production runs where consistent Acme thread geometry is required. The PVD-applied AlTiN coating makes this insert a strong candidate for dry or semi-dry cutting conditions and harder workpiece materials where heat generation is a concern.

Key Features

• Solid carbide construction with KCU10 grade for wear resistance in threading applications
• AlTiN finish applied by PVD process for thermal stability and extended tool life
• NAS style, size 3 insert fits Top Notch series toolholders
• Right-hand cutting orientation for Stub Acme thread profiles
• Covers both internal and external thread forms at 10 TPI with a 29-degree included angle
• Corner radius of 0.005 inches (0.13 mm) for precise thread root geometry

Compatibility

Designed for use with Top Notch series toolholding systems that accept NAS style size 3 threading inserts. Suitable for both internal and external Stub Acme threading operations in right-hand configurations.

Installation Notes

Threading inserts should be installed and indexed by a qualified machinist following the toolholder manufacturer's clamping procedures. Power down the machine and engage all safety locks before changing or seating inserts. Inspect the toolholder pocket for chips or damage before seating a new insert, and verify secure clamping torque per the toolholder manufacturer's specification before resuming cuts. Do not exceed the cutting parameters recommended for the KCU10 grade and AlTiN coating combination.