Kennametal 4175909 Threading Insert NT2L KCU10 Carbide

Product Description

The KENNAMETAL 4175909 is a carbide threading insert in the NT2L style, designed for both internal and external thread cutting operations. Built to Top Notch series specifications, it features an AlTiN finish applied via PVD coating process, which supports wear resistance in demanding machining environments. The insert carries a 60-degree partial profile thread form and a KCU10 manufacturer grade. With an external pitch range of 0.70 to 3.00 mm (8 to 36 TPI) and an internal pitch range of 1.25 to 3.50 mm (7 to 20 TPI), it covers a broad range of threading applications. This insert is intended for installation by machinists and CNC operators working on lathes and turning centers.

This threading insert is suited for production and job-shop environments where consistent thread form and tool life are priorities. It handles both internal and external threading in a left-hand orientation, making it appropriate for reverse-thread applications on turning equipment. The AlTiN PVD coating provides thermal stability and is well matched to ferrous and hardened materials. The Top Notch series tooling system is a common platform in production turning setups requiring quick insert indexing.

Key Features

• Carbide substrate with AlTiN PVD finish for extended tool life in ferrous materials
• Partial profile 60-degree thread form covers a wide TPI range without a dedicated insert per pitch
• External pitch range: 0.70 to 3.00 mm (8 to 36 TPI)
• Internal pitch range: 1.25 to 3.50 mm (7 to 20 TPI)
• Left-hand insert orientation for reverse-thread turning applications
• Top Notch series platform for reliable seating and repeatable indexing

Compatibility

Designed for use in Top Notch series threading toolholders that accept NT size 2 inserts with a left-hand configuration.

Installation Notes

Threading inserts of this type are installed and indexed by qualified machinists or CNC tooling technicians. Ensure the machine spindle is fully stopped and all motion is locked out before changing inserts. Use the appropriate torx or clamping screw driver specified for the Top Notch toolholder to seat the insert firmly without over-torquing the clamp screw. Verify insert orientation and thread hand match the programmed toolpath before resuming cutting operations.