Grooving — Especificaciones completas
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.
GD & GO Inserts — Double- & Single-Sided
GD (double-sided, 24/35mm insert length) and GO (single-sided) grooving/parting inserts, widths 1.5–10mm.
Designation: GD 24 N T-30.02-00-M1 — insert system (GD double-sided, GO single-sided), insert length (24 or 35mm), hand (R right, L left, N neutral), insert shape (T trapezoidal, R radius, S special), insert width (15=1.5mm, 20=2mm, 30=3mm, 40=4mm, 50=5mm, 60=6mm, 80=8mm, 100=10mm), corner radius (00=0.00, 02=0.20, 03=0.30, 04=0.40mm), and chip-breaker geometry suffix.
GD — M1 (medium cutting, widths 1.5–8mm)
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| Width | Designation | Grade | Material No. |
|---|---|---|---|
| 1.5 | GD24NT-15.015-00-M1 | GTCP320ST / GTP1340 / GTPP345 | MM12599663 / …660 / …666 |
| 2.0 | GD24LT/NT/RT-20.015/02-06/00-M1 | GTCP320ST / GTP1340 / GTPP345 | MM12248387 – MM12248401 |
| 3.0 | GD24LT/NT/RT-30.02-06/00-M1 | GTCP320ST / GTP1340 / GTPP345 | MM12235866 – MM12149224 |
| 4.0 | GD24LT/NT/RT-40.03-04/00-M1 | GTCP320ST / GTP1340 / GTPP345 | MM12416667 – MM12416656 |
| 5.0 | GD24NT-50.04-00-M1 | GTCP320ST / GTP1340 / GTPP345 | MM12336861 / …856 / …862 |
| 6.0 | GD24NT-60.04-00-M1 | GTCP320ST / GTP1340 / GTPP345 | MM12536051 / …043 / …052 |
| 8.0 | GD35NT-80.08-00-M1 | GTP1340 only | MM57004597 |
GD — F1 (very soft cutting, widths 2–5mm)
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| Width | Designation | Grade | Material No. |
|---|---|---|---|
| 2.0 | GD24LT/NT/RT-20.015/02-06/00-F1 | GTCP320ST / GTP1340 / GTPP345 | MM12245958 – MM12245962 |
| 3.0 | GD24LT/NT/RT-30.02-06/00-F1 | GTCP320ST / GTP1340 / GTPP345 | MM12236951 – MM12236948 |
| 4.0 | GD24LT/NT/RT-40.03-05/00-F1 | GTCP320ST / GTP1340 / GTPP345 | MM12416716 – MM12416703 |
| 5.0 | GD24NT-50.04-00-F1 | GTCP320ST / GTP1340 / GTPP345 | MM12395254 / …243 / …259 |
GD — MM (general application & turning, widths 2–6mm, single grade)
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| Width | Designation | Grade | Material No. |
|---|---|---|---|
| 2.0 | GD24NR-20.00-00-MM | GTP1340 | MM14689252 |
| 3.0 | GD24NR-30.00-00-MM | GTP1340 | MM14689249 |
| 4.0 | GD24NR-40.00-00-MM | GTP1340 | MM14689254 |
| 5.0 | GD24NR-50.00-00-MM | GTP1340 | MM14689250 |
| 6.0 | GD24NR-60.00-00-MM | GTP1340 | MM14689253 |
Full GD — ST1, T, and LM dimension tables (widths 1.5–6mm each) available on request.
GO — M1 (single-sided, widths 2–4mm shown)
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| Width | Designation | Grade | Material No. |
|---|---|---|---|
| 2.0 | GO24LT/NT/RT-20.015/02-06/00-M1 | GTCP320ST / GTP1340 / GTPP345 | MM12407615 – MM12407598 |
| 3.0 | GO24LT/NT/RT-30.02-06/00-M1 | GTCP320ST / GTP1340 / GTPP345 | MM12407644 – MM12407605 |
| 4.0 | GO24NT-40.03-00-M1 | GTCP320ST / GTP1340 / GTPP345 | MM12193967 / …966 / …969 |
Full GO — F1, ST1, T, M, MM, and LM dimension tables (widths up to 8mm) available on request.
GS & GA Inserts — Single-Sided & Axial
GS narrow single-sided inserts (widths 1.5–6mm) and GA axial-grooving inserts (widths 3–4mm).
GS — M1 (medium cutting, widths 2–6mm)
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| Width | Designation | Grade | Material No. |
|---|---|---|---|
| 2.0 | GSNT-20.02-00-M1 | GTCP320ST / GTP1340 / GTPP345 | MM12220987 / …961 / …122435 |
| 3.0 | GSNT-30.02-00-M1 | GTCP320ST / GTP1340 / GTPP345 | MM12220994 / …985 / MM11888187 |
| 4.0 | GSNT-40.03-00-M1 | GTCP320ST / GTP1340 / GTPP345 | MM12220998 / …006 / MM11888182 |
| 5.0 | GSNT-50.03-00-M1 | GTCP320ST / GTP1340 / GTPP345 | MM12169163 / …013 / …161 |
| 6.0 | GSNT-60.04-00-M1 | GTCP320ST / GTP1340 / GTPP345 | MM12169145 / …029 / …142 |
GS — LM (non-ferrous, widths 2–6mm, single grade)
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| Width | Designation | Grade | Material No. |
|---|---|---|---|
| 2.0 | GSNT-20.02-00-LM | GTWN715 | MM12596993 |
| 3.0 | GSNT-30.03-00-LM | GTWN715 | MM12596989 |
| 4.0 | GSNT-40.04-00-LM | GTWN715 | MM12596991 |
| 5.0 | GSNT-50.04-00-LM | GTWN715 | MM14447754 |
| 6.0 | GSNT-60.04-00-LM | GTWN715 | MM14447755 |
Full GS — ST1, M2, M, and MM dimension tables available on request.
GA — M (radius grooves / copy turning, widths 3–4mm)
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| Width | Designation | Grade | Material No. |
|---|---|---|---|
| 3.0 | GA24NR-30.00-00-M | GTCP320ST / GTP1340 / GTPP345 | MM14595669 / …666 / …672 |
| 4.0 | GA24NR-40.00-00-M | GTCP320ST / GTP1340 / GTPP345 | MM14598108 / …096 / …110 |
Full GA — T dimension table available on request. GA covers P (steel), K (cast iron), and M (stainless) material groups.
Toolholders — Monoblocks, Boring Bars & Modules
Monoblock external holders, GD-reinforced monoblocks, GD/GA boring bars, and the modular Module GA / Module Holder system.
Designation: GM E R-16-GD2402-K-T13-R-C — tool group (GM Monoblock), application (E external, I internal, A axial), hand, monoblock/boring-bar size, insert type + width + holder angle, tool length code (K=125mm, M=150mm, J=110mm, L=140mm, P=170mm, S=250mm), cutting-depth code (T13=13mm, T25=25mm), optional -R (reinforced), and optional -C (through-coolant).
Monoblocks GO/GD — standard, T13/T23 depth (widths 1.5–2mm shown)
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| Designation | T max [mm] | h [mm] | Hand | Material No. |
|---|---|---|---|---|
| GMEL-12-GD2402-K-T13 | 13 | 12 | L | MM12162709 |
| GMER-12-GD2402-K-T13 | 13 | 12 | R | MM12162706 |
| GMEL-16-GD2402-K-T13 | 13 | 16 | L | MM12162703 |
| GMEL-20-GD2402-K-T13 | 13 | 20 | L | MM12162691 |
| GMEL-12-GD24015-K-T23 | 23 | 12 | L | MM12599654 |
| GMEL-16-GD24015-K-T23 | 23 | 16 | L | MM12269982 |
Also available up to h=40mm shank (GD2403, T25 depth) — including GMEL/GMER-25/32/40-GD2403 variants for wider grooves.
Monoblocks GD — reinforced (-R) & with internal cooling (-R-C)
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| Designation | T max [mm] | h [mm] | Hand | Material No. |
|---|---|---|---|---|
| GMEL-12-GD2402-K-T13-R | 13 | 12 | L | MM12562846 |
| GMER-12-GD2402-K-T13-R | 13 | 12 | R | MM12522212 |
| GMEL-16-GD2402-K-T21-R | 21 | 16 | L | MM12562855 |
| GMEL-12-GD2402-K-T13-R-C | 13 | 12 | L | MM12595600 |
| GMEL-16-GD2402-K-T21-R-C | 21 | 16 | L | MM12562868 |
Boring bars (GD internal grooving), dA 25/32/40mm shank
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| Designation | dA [mm] | T max [mm] | L1 [mm] | Dmin [mm] | Material No. |
|---|---|---|---|---|---|
| GMIR-25-GD2402-T08-C | 25 | 8 | 200 | 32 | MM14579550 |
| GMIR-25-GD2403-T09-C | 25 | 9 | 200 | 32 | MM14579559 |
| GMIR-32-GD2403-T11-C | 32 | 11 | 250 | 42 | MM14531572 |
| GMIR-32-GD2404-T11-C | 32 | 11 | 250 | 42 | MM14579577 |
| GMIR-40-GD2404-T12-C | 40 | 12 | 300 | 53 | MM14579584 |
| GMIR-40-GD2405-T12-C | 40 | 12 | 300 | 53 | MM14579589 |
L-hand (GMIL-) equivalents available for every R-hand code shown.
Module GA — axial grooving (widths 3–4mm)
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| Designation | s [mm] | T max [mm] | Dmin–Dmax [mm] | h [mm] | Material No. |
|---|---|---|---|---|---|
| GAMR-2503-GA2403-T15-40-50 | 3 | 15 | 40–50 | 25 | MM14463975 |
| GAMR-2503-GA2403-T15-100-140 | 3 | 15 | 100–140 | 25 | MM14464021 |
| GAMR-2503-GA2403-T15-140-200 | 3 | 15 | 140–200 | 25 | MM14464024 |
| GAMR-2504-GA2404-T15-40-50 | 4 | 15 | 40–50 | 25 | MM14482809 |
| GAMR-2504-GA2404-T15-140-200 | 4 | 15 | 140–200 | 25 | MM14482819 |
L-hand (GAML-) equivalents available for every R-hand code shown.
Monoblocks GA — boring-bar style axial (Dmin 40–180mm, Dmax 60–400mm)
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| Designation | Tmax [mm] | Dmin–Dmax [mm] | h=h1 [mm] | l1 [mm] | Material No. |
|---|---|---|---|---|---|
| GMAR-25-GA03-K-T13-40-50 | 13 | 40–50 | 25 | 125 | MM12624781 |
| GMAR-25-GA03-K-T13-140-200 | 13 | 140–200 | 25 | 125 | MM12624779 |
| GMAR-25-GA04-K-T13-40-50 | 13 | 40–50 | 25 | 125 | MM14590378 |
| GMAR-25-GA05-M-20-45-60 | 13 | 45–60 | 25 | 150 | MM14646118 |
| GMAR-25-GA05-M-32-180-400 | 13 | 180–400 | 25 | 150 | MM14646128 |
Module Holder (mounts Module Radial GE.. and Module Axial GA.. inserts modules)
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| Designation | Angle s | Module radial | Module axial | Material No. |
|---|---|---|---|---|
| GEMHL-M-2020-00-J | 0° | GEML-20 | — | MM12578894 |
| GEMHL-M-2020-45-J | 45° | GEMR-20 | — | MM12578896 |
| GEMHL-M-2020-90-J | 90° | GEML-20 | — | MM12578897 |
| GEMHL-M-2525-00-L | 0° | GEML-25 | GAML-25 | MM12578898 |
| GEMHL-M-2525-45-L | 45° | GEMR-25 | GAMR-25 | MM12578899 |
| GEMHL-M-2525-90-L | 90° | GEMR-25 | GAMR-25 | MM12578900 |
Blades GS & Clamping Blocks
Parting/grooving blades (GBN/GBR/GBL, T max 25–60mm) mounted in matched clamping blocks, with or without internal coolant.
Blades GS — full range
| Designation | T max [mm] | Material No. |
|---|---|---|
| GBR-2602-GS02 | 25 | MM12167546 |
| GBL-2602-GS02 | 25 | MM12167544 |
| GBR-3202-GS02 | 25 | MM12167553 |
| GBL-3202-GS02 | 25 | MM12167550 |
| GBN-2603-GS03 | 35 | MM11896198 |
| GBN-3203-GS03 | 50 | MM11896189 |
| GBN-2604-GS04 | 40 | MM11896196 |
| GBN-3204-GS04 | 50 | MM11896181 |
| GBN-3205-GS05 | 55 | MM12170445 |
| GBN-3206-GS06 | 60 | MM12170446 |
Blade-mounting key: GK-3 (for 2 and 3mm blades, MM12154231), GK-4 (for 4, 5, and 6mm blades, MM12154233).
Clamping blocks — without internal cooling
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| Designation | h2 [mm] | h [mm] | l1 [mm] | b1 [mm] | For blade |
|---|---|---|---|---|---|
| SCB-GB26-2020 | 26 | 20 | 90 | 37 | GBN…26… |
| SCB-GB32-2520 | 32 | 25 | 110 | 38 | GBN…32… |
Clamping blocks — with internal cooling (-C)
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| Designation | h2 [mm] | h [mm] | l1 [mm] | b1 [mm] | For blade |
|---|---|---|---|---|---|
| SCB-GB26-2020-C | 26 | 20 | 82 | 40 | GBN…26… |
| SCB-GB32-2525-C | 32 | 25 | 95 | 44.5 | GBN…32… |
Spare parts: Clamping screw M6.0×25 (MM22485, no-cooling block), grub screw M6.0×8 (MM11960993) and clamping screw M6.0×12 (MM11776816, cooled block).
How to use the system: (1) insert the mounting key with the handle towards the front into the 2 tool location points; (2) move the key in the direction of the arrows to open the insert seat; (3) position the insert pressing it against the location face; (4) move the key forward to lock the seat and clamp the insert securely. Always maintain tension on the key while changing inserts.
Technical Data — Feeds, Speeds, Grades & Designation
Feed-rate and cutting-speed recommendations by geometry and material group, grade specifications, and full designation-system breakdowns.
Feed rate recommendation — geometry T, f [mm/rev] by cutting width and depth of cut ap [mm]
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| Cutting width | ap 0.5 | ap 1 | ap 1.5 | ap 2 | ap 2.5 | ap 3 |
|---|---|---|---|---|---|---|
| 2 | 0.10–0.15 | 0.05–0.15 | 0.05–0.12 | 0.05–0.10 | — | — |
| 3 | 0.10–0.17 | 0.05–0.17 | 0.05–0.17 | 0.05–0.15 | 0.05–0.12 | — |
| 4 | 0.10–0.20 | 0.07–0.20 | 0.07–0.20 | 0.07–0.20 | 0.07–0.17 | 0.07–0.15 |
| 5 | 0.10–0.25 | 0.10–0.25 | 0.07–0.25 | 0.07–0.25 | 0.07–0.22 | 0.07–0.20 |
| 6 | 0.15–0.30 | 0.15–0.30 | 0.15–0.30 | 0.15–0.30 | 0.15–0.30 | 0.15–0.25 |
Geometry M/MM allows substantially higher feeds (e.g. width 6 at ap 0.5 spans 0.20–0.70 mm/rev); geometry M2 falls between T and M/MM. Full charts for F1, M1, M2, M, MM, and LM available on request.
Cutting speed recommendation — M1, F1, T, M, M2 (vc [m/min])
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| Material | Hardness HB | GTP1340 | GTCP320ST | GTPP345 |
|---|---|---|---|---|
| Non-alloyed steel 0.15–0.45% C | 150–250 | 80–180 | 110–190 | 80–150 |
| Low-alloyed steel, tempered | 250–300 | 60–150 | 110–180 | 70–120 |
| High-alloyed steel, tempered | 350 | 50–120 | 70–160 | 60–100 |
| Corrosion-resistant steel, annealed | 200 | 50–200 | 120–200 | 90–160 |
| Stainless, annealed pearlitic | 200 | 50–200 | 120–200 | 100–180 |
| Stainless, quenched austenitic | 180 | 50–180 | 100–170 | 80–150 |
| Stainless, quenched duplex | 230–260 | 50–100 | 70–110 | 70–110 |
| Stainless, hardened martensitic | 330 | 50–80 | 60–90 | 60–90 |
| Grey cast iron | 180 | 100–200 | 90–180 | — |
| Spheroidal cast iron | 160 | 100–180 | 100–160 | — |
| Malleable pearlitic cast iron | 130 | 80–160 | 80–150 | — |
Cutting speed recommendation — ST1, MM (vc [m/min])
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| Material | Hardness | GTP1340 | GTCP320ST | GTPP345 |
|---|---|---|---|---|
| Stainless, annealed pearlitic | HB 200 | 50–200 | 120–200 | 100–180 |
| Stainless, quenched austenitic | HB 180 | 50–180 | 100–170 | 80–150 |
| Stainless, quenched duplex | HB 230–260 | 50–100 | 70–110 | 70–110 |
| Stainless, hardened martensitic | HB 330 | 50–80 | 60–90 | 60–90 |
| Exotic — Fe base | HB 200 | — | — | 20–45 |
| Exotic — Nickel/cobalt base | HB 250 | — | — | 15–25 |
| Exotic — Titanium | Rm 440 | — | — | 50–120 |
Grade descriptions
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| Grade | ISO equiv. | Composition / coating | Recommended for |
|---|---|---|---|
| GTP1340 | HC-P30 | HC-M25 | HC-K30 | HC-S30 | Co 9.0%; grain 0.7–1µm; HV30 1590; PVD TiAlN | Universal grade — steel, austenitic steel, cast iron, heat-resistant alloys |
| GTCP320ST | HC-P35 | HC-K35 | HC-M30 | Co 10.5%; grain 1µm; HV30 1400; CVD TiCN-Al2O3 multilayer | Steel and cast iron — excellent wear resistance, high toughness |
| GTPP345 | HC-P45 | HC-M40 | HC-S40 | Co 12.5%; grain 1–1.5µm; HV30 1380; PVD TiAlTaN | Steel and austenitic steel under unstable conditions — ideal for stainless |
| GTWN715 | HW-K15 | Co 6.0%; grain 0.8–1.3µm; HV30 1650; uncoated | Aluminium and other non-ferrous metals |
Insert designation system
GD 24 N T-30.02-00-M1: insert system (GD double-sided, GO single-sided, GS single-sided, GA axial) · insert length (24=24mm, 35=35mm) · hand (R/L/N) · insert shape (T trapezoidal, R radius, S special) · insert width (15=1.5mm through 100=10mm) · corner radius (00/02/03/04 = 0.00–0.40mm) · chip-breaker geometry.
Monoblock & module designation system
GM E R-16-GD2402-K-T13-R-C: tool group (GM Monoblock) · application (E external, I internal, A axial) · hand · tool size (monoblock 12×12–40×40mm, boring bar Ø16–Ø40mm) · insert type + width + holder angle · tool length (K=125, M=150, J=110, L=140, P=170, S=250mm) · cutting depth Tmax (T13=13mm, T25=25mm) · optional reinforced (-R) · optional coolant (-C). Module tools use a parallel GE M R-20-03-GO2402T13-40-50-C scheme (GE tool group, M module, insert type GO/GD/GS/GA, insert width, diameter range Dmin–Dmax).