Kennametal 1817993 Grooving Insert NG4189K KC5025 Left Hand

Product Description

The KENNAMETAL 1817993 is a solid carbide grooving insert in the Top Notch series, designed for external grooving and cutoff operations on CNC lathes and turning centers. It carries the NG4189K insert style designation and is manufactured in grade KC5025 with a PVD-applied TiAlN coating. The insert is configured for left-hand cutting with a 4.8 mm (0.1890 inch) cutting width and a maximum depth of cut of 6.35 mm (0.2500 inch). A positive rake angle of 10 degrees and the K chip breaker geometry promote controlled chip formation in a range of turning applications. Carbide material grade is C2 and C6.

This insert is suited for precision grooving work on ferrous and non-ferrous materials in production turning environments. The KC5025 grade with TiAlN finish performs in interrupted cuts and general-purpose grooving where wear resistance and edge toughness are both required. It is installed by machinists and CNC operators using compatible Top Notch series toolholders. The insert size designation is 4189 with an included angle of 55 degrees, a corner radius of 0.57 mm (0.0225 inch), and a lead angle of 3 degrees. This is not a full-radius insert. It is sold in a minimum order quantity of 5 units, packaged individually.

Key Features

• KC5025 carbide grade with PVD TiAlN coating for wear resistance in grooving applications
• 4.8 mm (0.1890 inch) cutting width with a maximum depth of cut of 6.35 mm (0.2500 inch)
• Positive 10-degree rake angle with K chip breaker for controlled chip evacuation
• Left-hand cutting configuration for compatible Top Notch series toolholders
• Corner radius of 0.57 mm (0.0225 inch) and 55-degree included angle
• Material grades C2 and C6 covering a broad range of workpiece materials

Compatibility

Designed for use with Top Notch series grooving toolholders that accept insert seat size 4 and the NG-style insert geometry. Confirm toolholder compatibility by matching the insert seat size and hand designation before installation.

Installation Notes

Installation should be performed by a qualified machinist or CNC operator with the machine in a fully stopped and locked-out state before changing inserts. Use the appropriate torque wrench and clamping hardware specified for the Top Notch toolholder to secure the insert without over-tightening. Inspect the insert seat and clamping surfaces for debris or wear before seating the new insert. Verify cutting direction and toolholder orientation match the left-hand designation of this insert prior to resuming operation.