Kennametal 4109827 Grooving Insert NG3142 KCU25 Carbide

Product Description

The KENNAMETAL 4109827 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 a KCU25 manufacturer grade and an AlTiN coating applied via PVD process, providing thermal and wear resistance suited to interrupted cuts and moderate-to-high cutting speeds. The insert features a 0.1421-inch cutting width, a maximum depth of cut of 0.1500 inches, and a neutral rake angle of 0 degrees. Right-hand orientation is standard for this configuration. Machinists and CNC operators in production and job-shop environments install this insert as part of a Top Notch toolholder system.

This insert is intended for grooving applications where tight width tolerances and controlled depth are required. The NG insert style with a 55-degree included angle and a 0.0125-inch corner radius suits groove profiles requiring a near-sharp corner with minimal radial relief. It is appropriate for use in steel and harder workpiece materials where the AlTiN PVD coating provides a meaningful advantage over uncoated or TiN-coated alternatives. The insert size designation is 3142, corresponding to Top Notch toolholder bodies designed for that seat geometry.

Key Features

• KCU25 grade solid carbide construction with AlTiN PVD coating for wear and heat resistance
• 0.1421-inch cutting width with a maximum depth of cut of 0.1500 inches
• Neutral rake angle and 0-degree lead angle for stable, consistent groove geometry
• 0.0125-inch corner radius for near-square groove profiles
• Right-hand cutting orientation; insert size 3142 for Top Notch system compatibility
• 55-degree included angle supports controlled chip formation in grooving cuts

Compatibility

Designed for use with Top Notch series toolholder bodies accepting the NG3142 insert seat. The MSC and manufacturer cross-reference number for this insert is NG3142R/L.

Installation Notes

Installation is performed by a machinist or CNC tooling technician. Before seating the insert, power down the machine and confirm the turret or toolpost is locked. Use the appropriate Top Notch clamping screw and torque driver specified by the toolholder manufacturer for secure insert retention. Inspect the seat pocket for chips or debris before seating to avoid insert fracture or poor seating.