Kennametal 1113072 NG3156 KC730 Grooving Insert Left Hand

Product Description

The KENNAMETAL 1113072 is a solid carbide grooving insert designed for precision external grooving and parting operations on CNC lathes and turning centers. Built to the NG3156 insert style in the Top Notch series, it features a KC730 grade carbide substrate with a PVD-applied TiN coating, which provides wear resistance and extended tool life on a range of workpiece materials. The insert is configured for left-hand cutting with a neutral rake geometry and delivers a cutting width of 3.96 mm and a maximum depth of cut of 3.81 mm. A 0.19 mm corner radius helps control edge strength and surface finish at the groove bottom. Machinists and CNC tool-room technicians install this insert as a direct seat-and-go replacement in compatible Top Notch toolholders.

This insert is suited for grooving applications in ferrous and non-ferrous turning environments where dimensional accuracy and consistent tool life are priorities. The KC730 grade targets ISO material groups C2, C3, and C4, making it applicable across cast iron, steel, and harder workpiece categories. The 55-degree included angle geometry and 3-degree lead angle are characteristic of the NG Top Notch platform. It is used in production turning cells, job-shop lathes, and multi-operation turning centers where repeatable groove profiles are required.

Key Features

• KC730 grade solid carbide with PVD TiN coating for wear resistance
• 3.96 mm cutting width for consistent groove sizing
• Maximum depth of cut of 3.81 mm, with a depth range of 3.00 mm to 4.00 mm
• Left-hand cutting orientation with neutral rake geometry
• 0.19 mm corner radius for controlled edge strength at groove base
• Top Notch series platform for secure insert clamping and repeatability

Compatibility

Designed for use in KENNAMETAL Top Notch series toolholders that accept the NG3156 insert style. Verify toolholder seat geometry and insert hand orientation before installation.

Installation Notes

Installation should be performed by a qualified machinist or CNC tool-room technician. Power down and lock out the machine spindle before seating or removing the insert. Use the appropriate torx or clamping key specified for the Top Notch toolholder; do not over-tighten the clamp screw. Inspect the toolholder pocket for chips or wear before seating a new insert to ensure proper contact and runout.