Kennametal 1112908 Threading Insert KC730 Carbide Tin

Product Description

The KENNAMETAL 1112908 is a carbide threading insert in the Top Notch series, designed for both internal and external thread cutting operations on CNC lathes and turning centers. Finished with a Titanium Nitride (TiN) coating applied via PVD process, this NT-style insert cuts partial profile 60-degree threads in right-hand orientation. It covers an external pitch range of 2.50-4.00 mm (6-11 TPI) and an internal pitch of 4.00 mm (6 TPI), making it a versatile choice for machining metric and unified thread forms. It is installed and used by machinists and CNC operators in production and job-shop environments.

This insert is suited for threading applications on materials classified under grades C2, C3, and C4, which correspond to general-purpose cast irons and non-ferrous metals. The KC730 grade with TiN PVD coating provides wear resistance for both internal and external thread profiles at the 60-degree included angle. The K chipbreaker geometry and size 3 insert body fit Top Notch-compatible toolholders. Typical applications include threading on medium-production turning setups where consistent thread form and tool life are priorities.

Key Features

• Partial profile 60-degree thread form covers both internal and external threading in a single insert
• KC730 carbide grade with PVD Titanium Nitride (TiN) finish for improved wear resistance and surface hardness
• External pitch range: 2.50-4.00 mm (6-11 TPI); internal pitch: 4.00 mm (6 TPI)
• Right-hand cutting orientation with K chipbreaker geometry
• NT insert style, size 3, compatible with Top Notch series toolholding systems
• Corner radius of 0.34 mm (0.0134 inches) for controlled thread root geometry

Compatibility

Designed for use with Top Notch series threading toolholders that accept NT-style size 3 inserts. Refer to KENNAMETAL toolholder selection guides to confirm holder compatibility before ordering.

Installation Notes

Threading inserts of this type are seated and clamped by a qualified machinist or CNC operator following the toolholder manufacturer's clamping procedure. Power down and lock out the machine spindle before changing inserts. Inspect the insert pocket and clamping screw for wear or damage before seating a new insert. Handle carbide inserts with care to avoid chipping the cutting edges prior to use.