Kennametal 3769402 VBMT221FP Carbide Turning Insert

Product Description

The KENNAMETAL 3769402 is a solid carbide turning insert with an AlTiN PVD coating, designed for precision metal cutting operations in CNC and manual lathe applications. It carries the ANSI designation VBMT221FP and ISO designation VBMT110304. The 35-degree diamond (rhombic) insert shape provides a sharp, low-included-angle geometry suited for finishing passes. The FP chip breaker geometry supports chip control during finishing cuts, and the KCU10 grade delivers high wear resistance across a range of workpiece materials including stainless steel, steel, cast iron, and superalloys. Insert thickness is 0.125 inches with a 0.25-inch inscribed circle and a 1/64-inch corner radius.

This insert is engineered for finishing operations and is rated for turning, facing, boring, back turning, and back boring applications. It is suited for use on stainless steel, steel, cast iron, aluminum, superalloys, and titanium workpieces. The positive rake angle and honed cutting edge style reduce cutting forces during light-to-moderate stock removal passes. The screw-on holding method secures the insert in compatible VBMT-style toolholders. It is a multi-use insert appropriate for both production and job-shop environments where tight tolerances and good surface finish are required.

Key Features

• AlTiN PVD coating for high wear resistance on steel, stainless steel, and cast iron
• 35-degree diamond insert shape for low cutting forces and access in tight profiles
• FP chip breaker optimized for finishing operations
• Positive rake geometry with honed cutting edge reduces built-up edge risk
• Screw-on mounting style for secure, repeatable insert positioning
• 2 usable cutting edges per insert
• Maximum depth of cut: 0.05 inches (1.25 mm)

Compatibility

Designed for use in VBMT-style screw-on toolholders compatible with ANSI size code 221 and ISO size code 110304. Conforms to ANSI and ISO insert standards. Suitable for CNC lathes and manual turning centers running stainless steel, steel, cast iron, aluminum, superalloys, and titanium workpieces.

Installation Notes

Installation is performed by qualified machinists or tooling technicians. Power down and lock out the machine spindle before changing inserts. Use the appropriate torque screwdriver or wrench specified for the toolholder system to secure the clamping screw — refer to the toolholder manufacturer documentation for correct seating procedure. Inspect the insert pocket and seating surface for chips or debris before mounting a new insert.