Kennametal 4109849 Grooving Insert KCU25 Solid Carbide

Product Description

The KENNAMETAL 4109849 is a solid carbide grooving insert designed for external grooving and turning operations on CNC lathes and turning centers. It carries a KCU25 manufacturer grade with an AlTiN coating applied via PVD process, providing strong wear resistance and thermal stability at the cutting edge. The insert features a 0.1252-inch cutting width, a maximum depth of cut of 0.25 inches, and a neutral rake angle with a 0.0075-inch corner radius. It belongs to the Top Notch series and is configured for right-hand cutting. Machinists and toolroom professionals use this insert for precision groove profiling in ferrous and non-ferrous materials.

This insert is suited for use in industrial turning applications where controlled groove width and repeatable depth are critical. It fits toolholders designed for the Top Notch NGD insert style. The K chip breaker geometry supports chip control across a range of feed and depth conditions. Typical applications include grooving on steel, stainless, and similar workpiece materials in production and job-shop environments. The insert is sold individually but requires a minimum order quantity of 5 units.

Key Features

• Solid carbide substrate with KCU25 grade for toughness and wear resistance
• AlTiN coating via PVD process for thermal protection and extended tool life
• 0.1252-inch cutting width with maximum depth of cut of 0.25 inches
• K chip breaker geometry for effective chip evacuation during grooving
• Neutral rake angle and 55-degree included angle for stable cutting geometry
• Right-hand configuration in the Top Notch NGD series for positive toolholder engagement

Compatibility

Designed for use with Top Notch series toolholders accepting NGD-style inserts. The MSC and manufacturer cross-reference number for this insert is NGD3125R/LK.

Installation Notes

Installation of grooving inserts should be performed by a qualified machinist or toolroom technician with the machine spindle fully stopped and locked out per facility lockout/tagout procedures. Seat the insert firmly into the toolholder pocket and verify clamp torque using the toolholder manufacturer's guidelines. Inspect the insert seat and clamping components for debris or wear before each insert change. Do not exceed the maximum depth of cut rating for this insert style.