Kennametal 1114390 Grooving Insert NGD4125K KC730 Left Hand

Product Description

The KENNAMETAL 1114390 is a solid carbide grooving insert in the Top Notch series, designed for external grooving and turning operations on CNC lathes and turning centers. It carries a TiN coating applied via PVD process, which improves wear resistance and extends tool life in continuous and interrupted cuts. The insert features a left-hand orientation, a 0.125-inch (3.18 mm) cutting width, and a maximum depth of cut of 0.250 inch (6.35 mm). Grade KC730 is a PVD-coated carbide grade suited for a range of workpiece materials. Licensed machinists and CNC operators install this insert in compatible Top Notch toolholders.

This insert is intended for use on ferrous and non-ferrous materials falling within material grades C2, C3, and C4. Typical applications include groove turning, plunge grooving, and face grooving on production lathes in both job shop and high-volume manufacturing environments. The positive rake geometry and K-style chip breaker promote efficient chip evacuation and reduced cutting forces, making the insert well suited for finish grooving operations where surface quality and dimensional accuracy are priorities.

Key Features

• Solid carbide construction with PVD-applied TiN coating for extended wear resistance
• Left-hand insert orientation for specific toolholder configurations
• 0.125-inch (3.18 mm) cutting width with a maximum depth of cut of 0.250 inch (6.35 mm)
• Positive rake angle of 10 degrees promotes lower cutting forces and clean chip formation
• K-style chip breaker designed for efficient chip control in grooving applications
• Corner radius of 0.0075 inch (0.19 mm) for controlled edge geometry; full radius not included

Compatibility

Designed for use with Top Notch series toolholders accepting insert seat size 4 and NGD-style inserts. Verify toolholder seat and clamping compatibility before installation.

Installation Notes

Installation should be performed by a qualified machinist or CNC tooling technician following the machine tool manufacturer guidelines. Power down and lock out the machine before seating or replacing inserts. Use the appropriate torx or hex key as specified by the toolholder manufacturer to achieve proper clamping torque. Inspect the insert seat and clamping surfaces for chips or debris before installing a new insert.