Kennametal 4176188 Threading Insert NTB3RB KCU10 Carbide

Product Description

The KENNAMETAL 4176188 is a carbide threading insert in the Top Notch series, designed for precision thread-cutting on both internal and external American Buttress threads. Coated with AlTiN via a PVD process, it delivers heat resistance and extended tool life in demanding threading operations. The insert carries grade KCU10, sized at Insert Size 3, with a pitch range of 8 to 16 TPI and a right-hand cutting orientation. A corner radius of 0.0065 inches and a tip-to-top measurement of 0.0122 inches make this insert well-suited for accurate thread form production in machining environments.

This insert is intended for use in CNC lathes and threading toolholders that accept Top Notch series inserts. It covers American Buttress thread profiles across a range of 8 to 16 TPI, supporting both internal and external thread applications. Machinists working in production shops, tool rooms, or job shops will find this insert appropriate for medium to high-volume threading passes on ferrous and non-ferrous materials where AlTiN coating provides a performance advantage.

Key Features

• Carbide substrate with AlTiN finish applied via PVD coating process for heat and wear resistance
• Covers 8 to 16 TPI range on American Buttress thread profiles, internal and external
• Right-hand cutting orientation, Insert Size 3, Top Notch series
• Corner radius of 0.0065 inches for consistent thread form accuracy
• Manufacturer grade KCU10 suited for a range of threading applications
• Thickness of 0.1949 inches (4.95 mm) for stable seating in compatible toolholders

Compatibility

Designed for use with Top Notch series threading toolholders that accept Insert Size 3 geometry. No additional specific compatible model numbers were provided in the product data.

Installation Notes

Installation should be performed by a qualified machinist following the toolholder manufacturer's seating and clamping procedures. Ensure the machine spindle is fully stopped and the toolholder is secured in the turret before inserting or replacing the insert. Verify insert orientation matches the right-hand cutting direction before engaging the workpiece. Follow applicable shop safety protocols and machine guarding requirements during any insert change.