Chip-Breaker Geometries & Material Selection
Chip-Breaker Geometries & Material Selection
GD (double-sided), GO (single-sided), GS (single-sided), and GA (axial) insert systems across 7 chip-breaker geometries.
Galtona grooving inserts share the same geometry naming across the GD (double-sided), GO (single-sided), GS (single-sided, narrower body), and GA (axial) insert families: M1 (medium cutting, narrow negative chamfer, steel and grey cast iron), F1 (very soft cutting, low cutting forces, parting tubes and thin-walled parts), ST1 (stainless and super-alloys), T (combined grooving and turning), M (radius grooves / copy turning), MM (general application and turning, especially stainless), and LM (non-ferrous metals, highly positive rake with "microfinish" rake face).
Material group → recommended geometry and grade (GD/GO/GA)
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| Material group | Geometry (first choice) | First-choice grade | Higher wear | Higher toughness |
|---|---|---|---|---|
| Steel | M1 – F1 | GTP1340 | GTCP320ST | GTPP345 |
| Steel | T – M | GTP1340 | — | — |
| Stainless steel | ST1 – F1 – T – M – MM | GTP1340 | — | GTPP345 |
| Cast iron | M1 | GTP1340 | GTCP320ST | GTPP345 |
| Cast iron | M | GTP1340 | — | — |
| Exotic alloys | ST1 | GTPP345 | — | — |
| Non-ferrous metals | LM | GTWN715 | — | — |
Material group → recommended geometry and grade (GS)
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| Material group | Geometry (first choice) | First-choice grade | Higher wear | Higher toughness |
|---|---|---|---|---|
| Steel | M1 – M2 – M | GTP1340 | GTCP320ST | GTPP345 |
| Stainless steel | ST1 – MM | GTP1340 | — | GTPP345 |
| Cast iron | M1 – M2 | GTP1340 | — | GTPP345 |
| Non-ferrous metals | LM | GTWN715 | — | — |
Application/parting icons on each geometry indicate whether the insert is intended for parting, grooving, and/or turning — most GD geometries cover all three; GS and GA geometries are grooving/turning only.