Kennametal 1112896 Threading Insert NT3LK KC730 Carbide

Product Description

The KENNAMETAL 1112896 is a carbide threading insert in the Top Notch series, designed for both internal and external thread cutting operations. It carries the NT3LK style designation and is manufactured in the KC730 grade with a Titanium Nitride (TiN) finish applied via PVD coating. This insert produces a partial profile 60-degree thread form and is configured for left-hand cutting. External pitch range is 1.25 to 4.00 mm (6 to 20 TPI) and internal pitch range is 2.00 to 5.00 mm (5 to 12 TPI). It is installed by machinists and CNC operators on lathes and turning centers performing threading passes on ferrous and non-ferrous workpieces.

This insert is suited for threading applications on turning equipment where a left-hand partial profile 60-degree thread form is required. It handles both internal and external threading in a single insert style, making it a practical choice for shops running mixed threading jobs. Material grades C2, C3, and C4 indicate suitability across a range of general-purpose cutting conditions including steel, cast iron, and non-ferrous alloys. The K-style chipbreaker aids in chip control during threading passes.

Key Features

• KC730 carbide grade with PVD-applied Titanium Nitride (TiN) coating for wear resistance
• Left-hand cutting configuration for reverse-thread applications
• Partial profile 60-degree included angle covers both internal and external thread forms
• External pitch range: 1.25 to 4.00 mm (6 to 20 TPI)
• Internal pitch range: 2.00 to 5.00 mm (5 to 12 TPI)
• K-style chipbreaker for controlled chip evacuation during threading

Compatibility

Designed for use in Top Notch series threading toolholders accepting NT insert style, size 3. Compatible with tooling systems configured for left-hand, partial profile 60-degree threading inserts.

Installation Notes

Installation should be performed by a qualified machinist or CNC operator with the machine spindle stopped and all energy sources locked out before changing inserts. Seat the insert fully in the Top Notch pocket and torque the clamping screw according to the toolholder manufacturer specifications. Inspect the insert pocket for chips or debris before seating. Left-hand inserts require confirmation of spindle direction and feed direction before initiating a threading pass.