Galtona

Heavy-duty turning inserts

Carbide inserts for heavy turning and roughing (HDT) — TCH, HD2, HD5 and HD8 chip grooves plus a dedicated titanium range.

Galtona's HDT range extends the Negative Size Turning program for demanding, heavy-duty turning — from medium roughing up to full interrupted-cut capability.

Four dedicated chip grooves scale with depth of cut: TCH (2.5–10 mm), HD2 (1.5–12 mm, new sharp positive geometry for high-strength steels), HD5 (2–12 mm), and HD8 (2.5–12 mm, rated for consistent, inconsistent, *and* interrupted cuts).

The 909+ groove adds medium-and-roughing coverage across CNMG, SNMG, and TNMG shapes plus RCMT round inserts, in GTCP125, GTCP135, and cast-iron-specific GTCK120 grades.

Also includes a dedicated turning-titanium range ("S15") with IPE+ chipbreaker geometry across CNMG, DNMG, SNMG, TNMG, VNMG, and WNMG insert shapes.

HD5 — heavy-duty chip groove

HD5 Chip Groove

Mid-range heavy-duty geometry across P15/P25/P35 steel grades.

Example: CNMM 190616EN-HD5. Depth of cut 2.00–12.00 mm, feed 0.80–0.30 mm.

Heavy turning steel neg "P15"

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DesignationChipbreakerMaterial No.Available
CNMM 120412-HD5 GTCP115…-HD5MM12046218●
CNMM 160612-HD5 GTCP115…-HD5MM12044415●
CNMM 190612-HD5 GTCP115…-HD5MM12030570●
DNMM 150612-HD5 GTCP115…-HD5MM12044385●

Heavy turning steel neg "P25"

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DesignationChipbreakerMaterial No.Available
CNMM 120412EN-HD5 GTCP125…-HD5MM12046217●
CNMM 120416EN-HD5 GTCP125…-HD5MM12044382●
CNMM 160612EN-HD5 GTCP125…-HD5MM12044410●
CNMM 190612EN-HD5 GTCP125…-HD5MM11840692●
CNMM 190616EN-HD5 GTCP125…-HD5MM11836430●
CNMM 250724EN-HD5 GTCP125…-HD5MM11848028●
CNMM 250924EN-HD5 GTCP125…-HD5MM11840037●
DNMM 150612EN-HD5 GTCP125…-HD5MM12044390●
SNMM 190612EN-HD5 GTCP125…-HD5MM11840041●
SNMM 190616EN-HD5 GTCP125…-HD5MM11840042●
SNMM 250724EN-HD5 GTCP125…-HD5MM11840045●
SNMM 250924EN-HD5 GTCP125…-HD5MM11840046●

Heavy turning steel neg "P35"

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DesignationChipbreakerMaterial No.Available
CNMM 120412-HD5 GTCP135…-HD5MM12046219●
CNMM 120416-HD5 GTCP135…-HD5MM12044397●
CNMM 160612-HD5 GTCP135…-HD5MM12044423●
DNMM 150612-HD5 GTCP135…-HD5MM12044431●

Cutting data — general cutting parameters by workpiece material

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GroupType / alloyHardness HBGTCP115 vcGTCP125 vcGTCP135 vc
PNon-alloyed steel 0–0.45% C150–250220–400170–240170–190
PLow-alloyed steel250–300200–320100–19090–150
PHigh-alloyed steel200180–320130–210120–200
PCorrosion-resistant steel200200–320130–210140–180
MFerritic stainless200220–320140–210140–200
MAustenitic stainless180–100–210110–190
MDuplex stainless230–260––80–150
MMartensitic stainless330–70–10055–75
KGrey cast iron180140–370130–210–
KSpheroidal cast iron160190–430120–240–
KMalleable/tempered iron130180–520150–250–
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