Iscar 5500221 Turning Insert Cnmg 643 IC20

Product Description

The ISCAR 5500221 is a CNMG 643 style indexable turning insert with IC20 carbide grade, designed for external turning, facing, and profiling operations on CNC lathes and turning centers. The C diamond shape (80-degree included angle) combined with N-type clearance (0 degrees) and M-tolerance class provides a rigid, predictable cutting geometry suited for medium-duty roughing and semi-finishing passes. The G-style chip breaker geometry promotes chip control across a range of depths of cut and feed rates. These inserts are installed by machinists and CNC lathe operators in production and job-shop environments.

This insert is suited for turning applications requiring a balance of edge strength and chip control. The CNMG 643 size designation indicates a 0.750-inch inscribed circle diameter and a 0.250-inch insert thickness. The IC20 carbide substrate is formulated for general-purpose turning. Typical applications include machining steel, alloy steel, and other medium-hardness ferrous workpiece materials at moderate cutting parameters. This insert is sold individually but must be ordered in multiples of 10.

Key Features

• C-shape (80-degree diamond) geometry delivers strong cutting edge for roughing and semi-finishing
• IC20 carbide grade provides wear resistance in general-purpose turning of ferrous materials
• G chip breaker geometry promotes consistent chip evacuation across varied feed and depth conditions
• M-tolerance class ensures dimensional consistency and repeatable insert indexing
• N-type clearance (0-degree flank) maximizes edge strength for interrupted or heavy cuts
• CNMG 643 industry-standard form factor fits compatible CNMG toolholders

Compatibility

Designed as an OEM-style replacement or standard production insert for CNMG 643 indexable turning toolholders that accept 80-degree diamond inserts with N clearance and M tolerance. Confirm toolholder insert-seat specifications before ordering.

Installation Notes

Insert seating and clamping must be performed with the machine fully powered down and the spindle locked. Use the appropriate torque wrench and manufacturer-specified seating hardware for the toolholder to avoid cracking the insert or damaging the pocket. Inspect the insert seat and clamp for chips or wear before indexing to a fresh edge. Follow applicable shop safety procedures and machine-specific lockout/tagout protocols during any tooling change.