Sumitomo 19W1AFI CNMG432EMU AC8020P Carbide Turning Insert

Product Description

The SUMITOMO 19W1AFI is a CNMG-style solid carbide turning insert coated with Absotech CVD finish and graded AC8020P. Designed for negative-rake turning operations, it features an 80-degree included angle, a 0.5079-inch insert length, a 1/2-inch inscribed circle, a 0.1874-inch thickness, and a 0.0315-inch corner radius. The EMU chip breaker geometry is engineered to manage chip formation during steel turning, reducing the risk of built-up edge and improving surface finish consistency. This insert is intended for installation by machinists and toolroom technicians operating CNC lathes and manual turning centers.

The 19W1AFI is suited for primary and secondary machining of steel workpieces, corresponding to ISO material grade P20. The CNMG432 form factor fits standard CNMG-style toolholders using clamp and pin holding methods. Typical applications include roughing and semi-finishing passes on low-to-medium alloy steel components in production and job-shop environments. The AC8020P grade provides wear resistance and thermal stability appropriate for moderate-to-high cutting speeds on ferrous materials.

Key Features

• Absotech CVD coating for enhanced wear resistance and thermal protection on steel
• EMU chip breaker geometry promotes controlled chip evacuation during steel turning
• Negative rake design reduces cutting forces on rigid setups
• CNMG insert style with 80-degree included angle for versatile turning profiles
• Clamp and pin holding method for secure seating in compatible toolholders
• ISO code CNMG120408N-MU for international toolholder cross-reference

Compatibility

Designed for use in standard CNMG-style turning toolholders that accept a 432 insert size with clamp and pin clamping. Verify toolholder pocket dimensions and insert seat geometry before installation. ISO designation CNMG120408N-MU may be used to cross-reference compatible toolholder specifications.

Installation Notes

Installation is performed by qualified machinists or toolroom technicians. Power down and lock out the machine spindle before changing inserts. Seat the insert fully in the toolholder pocket and tighten the clamp screw to the toolholder manufacturer's specified torque. Inspect the insert seat for chips or debris before each installation to ensure proper contact and prevent premature edge failure.