ANSI / ISO Designation TABLES

Machining knowledge, made practical

Printable Reference

ANSI / ISO Designation Tables

Two printable reference sheets that break down an insert designation letter by letter and number by number — one for the ANSI system, one for the ISO system. Keep a copy at the machine for quick lookups.

Download the charts

Each chart shows exactly what every position in the code means — shape, clearance angle, tolerance, size, thickness, and corner radius. Click a chart to preview it, or use the button to download the printable PDF.

INSERT DESIGNATION — ANSI
ANSI insert designation chart

The traditional inch-based system — shorter codes, widely used across North America.

Download ANSI Chart (PDF)
INSERT DESIGNATION — ISO
ISO insert designation chart

The metric system — longer, fully spelled-out codes used internationally.

Download ISO Chart (PDF)

Need to convert or decode a code instantly instead? Use our interactive tools — no printing required.

ANSI / ISO Conversion Tool Insert Designation Chart
Reference: standard ANSI and ISO turning insert designation systems. Confirm the exact grade and coating with the manufacturer's catalog.

Ready to cut

Once the geometry is settled, the grade and the holder decide how long it lasts. Browse the turning line built for tight tolerances under aggressive feeds.

FM Carbide Turning Inserts → Tool Holders Boring Bars

Not sure which grade matches your material? Use the Grade Look-Up.