Kennametal 4176187 Threading Insert KCU10 Carbide Altin

Product Description

The KENNAMETAL 4176187 is a carbide threading insert in the Top Notch series, designed for cutting American Buttress threads on both internal and external workpieces. It carries the KCU10 manufacturer grade with a PVD-applied AlTiN finish, providing elevated wear resistance and thermal stability during threading operations. The insert is right-hand oriented, covers a pitch range of 8-16 TPI, and fits Size 3 Top Notch toolholders. Machinists and CNC operators use this insert in production threading where consistent thread form and extended tool life are required. At 0.1949 inches thick with a 0.0065-inch corner radius, it delivers precise thread geometry on each pass.

This threading insert is suited for internal and external buttress thread applications in metalworking environments, including aerospace, oil and gas, and general machining operations where American Buttress thread profiles are specified. It is intended for use in CNC lathes and turning centers equipped with compatible Top Notch series threading toolholders. The AlTiN coating makes it a strong candidate for dry or semi-dry cutting conditions and harder workpiece materials. Minimum order quantity is 5 pieces, sold in single-piece packaging per unit.

Key Features

• KCU10 carbide grade with PVD AlTiN coating for wear resistance at elevated cutting temperatures
• American Buttress thread form, covering 8-16 TPI pitch range
• Right-hand insert orientation, compatible with Size 3 Top Notch toolholders
• Handles both internal and external threading in a single insert style
• Corner radius of 0.0065 inches for accurate thread root geometry
• Part of the Top Notch series for secure, repeatable insert indexing

Compatibility

Designed for use with Kennametal Top Notch series Size 3 threading toolholders accepting NTB-style inserts in right-hand configurations.

Installation Notes

Threading inserts should be installed by a qualified machinist or CNC operator with the machine fully stopped and the toolholder secured in the turret. Ensure the toolholder pocket and seating surface are clean and free of chips before seating the insert. Torque the clamp screw according to the toolholder manufacturer specification. Verify thread form with a go/no-go gauge after the first pass before committing to a full production run.