Kennametal 1182181 Threading Insert 12 Tpi KC730 Carbide

Product Description

The KENNAMETAL 1182181 is a carbide threading insert designed for external thread cutting on UN-standard threads at 12 TPI. Manufactured in the NTC3R12E geometry, it carries a Titanium Nitride (TiN) finish applied via PVD coating process and is assigned manufacturer grade KC730, covering material grades C2, C3, and C4. The insert produces a 60-degree included angle standard to UN thread forms and is intended for right-hand external threading operations. It is part of the Top Notch series, a tooling platform widely used in production turning environments. Machining professionals and toolroom technicians install this insert into compatible Top Notch holders for threading steel, cast iron, and non-ferrous workpieces.

This insert is suited for external threading applications in CNC lathe and turning center operations where UN thread standards are required. The KC730 grade with PVD TiN coating provides wear resistance appropriate for moderate to high-speed threading passes on carbon steels, alloy steels, and cast iron. It is a common choice in job shops and production facilities running 12 TPI thread profiles on external diameters. The insert ships individually with a minimum order quantity of 5 units.

Key Features

• Carbide substrate with PVD-applied Titanium Nitride (TiN) finish for extended tool life
• Manufacturer grade KC730 rated for material grades C2, C3, and C4
• 12 TPI external thread pitch with 60-degree included angle for UN thread forms
• Right-hand cutting geometry, NTC3R12E insert style
• Insert size 3, part of the Top Notch series tooling platform
• Corner radius of 0.0010 inches (0.25 mm) for precise thread root definition

Compatibility

Designed for use in Top Notch series threading toolholders accepting size 3 NTC-style inserts configured for external UN threading applications.

Installation Notes

This insert is installed and replaced by a qualified machinist or toolroom technician. Power down and lock out the machine spindle before changing inserts. Seat the insert fully and evenly in the toolholder pocket and verify clamp torque per the toolholder manufacturer specification before resuming cuts. Do not use a damaged or chipped insert, as it will produce out-of-tolerance thread forms.