Kennametal 4176141 Threading Insert NA6R2 KCU10 Carbide

Product Description

The KENNAMETAL 4176141 is a Top Notch series carbide threading insert designed for cutting Acme threads in both internal and external applications. Manufactured to Insert Style NA6R2, the insert carries the KCU10 manufacturer grade and features a Physical Vapor Deposition (PVD)-applied AlTiN finish for improved wear resistance and tool life at elevated cutting temperatures. The right-hand insert covers a 2 TPI internal pitch with an included angle of 29 degrees. A 0.0050-inch corner radius and a cutting tip width of 0.1802 inches make it well suited for precision thread-form work. Licensed machinists and CNC tooling technicians working in production or job-shop environments install this insert.

This threading insert is intended for Acme thread-form applications, both internal and external, where a right-hand cutting direction is required at 2 TPI. The Top Notch series platform accommodates the NA insert style, making this insert a direct fit for compatible Top Notch-style toolholders. Typical use cases include threading on lathes and turning centers in general machining, maintenance repair, and production environments where Acme thread forms are specified on shafts, lead screws, and similar components.

Key Features

• KCU10 carbide grade with PVD-applied AlTiN finish for extended tool life in threading operations
• Acme thread standard, right-hand cutting direction, 2 TPI pitch
• 29-degree included angle consistent with Acme thread-form geometry
• Cutting tip width of 0.1802 inches (4.58 mm) for accurate thread-form reproduction
• Corner radius of 0.0050 inches (0.13 mm) for precise tip geometry
• Top Notch series insert platform for secure, repeatable seating in compatible toolholders

Compatibility

Designed for use in Top Notch series toolholders that accept the NA insert style in Insert Size 6. Confirm toolholder specification against the NA6R2 insert style designation before installation.

Installation Notes

Threading inserts of this type are installed and indexed by qualified machinists or CNC tooling technicians. Power down and lock out the machine spindle before changing or indexing inserts. Use the appropriate torque wrench and clamp screw specified by the toolholder manufacturer — do not overtighten or substitute hardware. Inspect the insert seat and clamp for chips or debris before seating the insert to ensure proper contact and runout control.