Kennametal 1818920 Grooving Insert NG3189K KC5025 Tialn

Product Description

The KENNAMETAL 1818920 is a solid carbide grooving insert designed for precision parting and grooving operations on CNC lathes and turning centers. Designated insert style NG in the Top Notch series, it carries a TiAlN coating applied via PVD process, delivering high heat resistance and extended tool life in demanding cutting conditions. The insert features a 4.8 mm cutting width, a maximum depth of cut of 3.81 mm, and a positive rake angle of 10 degrees, which reduces cutting forces and supports clean chip evacuation. It is configured for left-hand cutting and is intended for professional machining environments where consistent insert geometry is critical to part quality and cycle time.

This insert is suited for external grooving, undercutting, and parting applications on ferrous and non-ferrous workpiece materials classified under material grades C2 and C6. The K chip breaker geometry is optimized for controlled chip formation in medium to finish cutting passes. With a 3-degree lead angle and a 0.57 mm corner radius, it is well matched to applications requiring precise groove profiles and repeatable surface finishes. Machinists and tooling specialists working in production turning environments will find this insert appropriate for tight-tolerance groove operations where insert consistency across a batch is essential.

Key Features

• TiAlN coating via PVD process for high-temperature wear resistance
• 4.8 mm cutting width with a maximum depth of cut of 3.81 mm
• Positive rake angle of 10 degrees reduces cutting forces and aids chip flow
• K chip breaker geometry for controlled chip formation in grooving passes
• Left-hand cutting configuration for specific tool holder orientations
• Solid carbide substrate in Kennametal grade KC5025 for toughness and edge stability

Compatibility

Designed for use in Top Notch series NG-style grooving tool holders that accept the 3189 insert size. Verify holder hand orientation and insert pocket geometry before installation.

Installation Notes

Installation should be performed by a qualified machinist or tooling technician with the spindle fully stopped and the machine locked out per applicable safety procedures. Seat the insert firmly in the tool holder pocket and tighten the clamping screw to the tool holder manufacturer's specified torque using the appropriate torque wrench and driver. Inspect the insert seating surface and pocket for chips or debris before installation, as contamination can affect insert stability and cutting geometry. Confirm insert hand orientation matches the tool holder before commencing any cutting operation.