Kennametal 4109848 Grooving Insert KCU25 Solid Carbide Altin

Product Description

The KENNAMETAL 4109848 is a solid carbide grooving insert in the Top Notch series, designed for precision grooving and parting operations on CNC lathes and turning centers. Carrying the KCU25 manufacturer grade with a PVD-applied AlTiN coating, this insert delivers thermal resistance and wear protection in demanding cutting environments. The left-hand orientation accommodates specific toolholder configurations, and the K chip breaker geometry supports controlled chip evacuation at the cutting zone. A 3.18 mm cutting width and a maximum depth of cut of 6.35 mm define its primary working envelope. Machinists and toolroom technicians working with steel, stainless, and similar materials will find this insert a direct fit for clamp-style Top Notch toolholders.

This insert is suited for external and face grooving applications on manual and CNC turning equipment. It is a metric-dimensioned insert sized at 3125 in the Top Notch series and is held in place by a clamp-style insert holding method. The KCU25 grade with AlTiN coating makes it appropriate for medium to moderate interrupted cuts where heat generation and abrasion resistance are primary concerns. Installation and indexing are performed by qualified machinists or toolroom personnel following standard lathe lockout and toolholder torque procedures per shop and equipment guidelines.

Key Features

• PVD AlTiN coating for high thermal resistance and extended tool life in abrasive cutting conditions
• KCU25 carbide grade suited for medium-duty grooving and parting on steel and similar materials
• Left-hand insert orientation for compatible clamp-style Top Notch toolholders
• K chip breaker geometry supports predictable chip control during grooving passes
• 3.18 mm cutting width with a maximum depth of cut of 6.35 mm
• 55-degree included angle with a 0.19 mm corner radius for defined edge geometry

Compatibility

Designed for use with clamp-style Top Notch series toolholders that accept the NGD3125 insert size in a left-hand configuration. Verify toolholder insert pocket specifications before installation.

Installation Notes

Installation should be performed by a qualified machinist or toolroom technician. Power down and lock out the machine per OSHA lockout-tagout procedures before indexing or replacing inserts. Use the correct clamping screw torque as specified by the toolholder manufacturer — do not overtighten or undertighten the clamp. Inspect the insert pocket and clamp for wear or debris before seating the new insert.