Kennametal 3769466 VBMT3305FP KCU25 Carbide Turning Insert

Product Description

The KENNAMETAL 3769466 is a VBMT3305FP geometry carbide turning insert in the KCU25 grade, designed for precision finishing operations on CNC lathes and turning centers. Coated with AlTiN via a PVD process, the insert delivers moderate wear resistance and toughness across a broad range of workpiece materials. The 35-degree diamond (rhombic) shape provides a sharp, positive rake angle of 15 degrees and a honed cutting edge for clean surface finishes. With a 0.0079-inch corner radius and a maximum depth of cut of 0.0492 inches, this insert is optimized for light finishing passes rather than heavy roughing. It is installed using a screw-on holding method and carries a neutral hand orientation, making it adaptable to a variety of toolholder configurations used by professional machinists and tooling technicians.

This insert is suited for finishing applications including turning, facing, boring, back turning, and back boring. Primary target workpiece materials are steel, stainless steel, and superalloys and titanium, with secondary suitability for cast iron, aluminum, and other non-ferrous materials. The KCU25 grade with its PVD AlTiN coating is particularly well matched to interrupted cuts and applications where edge security and surface finish quality are both critical. It conforms to both ANSI insert code VBMT3305 and ISO insert code VBMT160402, allowing direct cross-reference against standard toolholder catalogs.

Key Features

• AlTiN PVD coating provides moderate wear resistance and toughness for steel, stainless steel, cast iron, aluminum, and superalloys
• 35-degree diamond insert shape with positive rake angle of 15 degrees for reduced cutting forces during finishing
• Honed cutting edge style delivers consistent surface finish quality on precision turning operations
• Screw-on holding method with a 0.1732-inch hole diameter for secure, repeatable seating in compatible toolholders
• FP chip breaker geometry optimized for finishing chip control at light depths of cut
• Dual-standard compliance with ANSI VBMT3305 and ISO VBMT160402 for broad toolholder compatibility
• 2 cutting edges per insert maximize usable life per unit

Compatibility

Conforms to ANSI insert code VBMT3305 and ISO insert code VBMT160402. Designed for use in screw-on style VBMT toolholders that accept a 3/8-inch inscribed circle, 35-degree diamond insert. Suitable for multi-use turning applications including turning, facing, boring, back turning, and back boring.

Installation Notes

Installation is performed by qualified machinists or tooling technicians following standard CNC lathe lockout and toolholder change procedures. Ensure the toolholder pocket and seating surfaces are clean and free of debris before seating the insert to maintain accurate edge height and runout. Use the manufacturer-specified torque driver for the screw-on fastener to avoid insert rocking or premature edge failure. Index or replace the insert when surface finish quality or dimensional accuracy degrades, and do not continue cutting on a visibly chipped or worn edge.