909+ Chip Groove — Medium & Roughing

CNMG/SNMG/TNMG plus RCMT round inserts (…-XR), across GTCP125, GTCP135, and GTCK120 grades.

Example: CNMG 160612-909+. Depth of cut 3.20–7.60 mm, feed 1.00–0.60 mm. Not recommended for interrupted cuts.

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Designation	Chipbreaker	Material No.	Available
CNMG 160612-909+ GTCP125	…-909+	MM11854347	●
CNMG 190612-909+ GTCP125	…-909+	MM11854749	●
CNMG 190616-909+ GTCP125	…-909+	MM11625891	●
SNMG 150612-909+ GTCP125	…-909+	MM11855109	●
SNMG 190612-909+ GTCP125	…-909+	MM11855114	●
TNMG 220412-909+ GTCP125	…-909+	MM11860512	●
RCMT 1606MOSN-XR GTCP125	…-XR	MM11855078	●
RCMT 2006MOSN-XR GTCP125	…-XR	MM11855080	●

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Designation	Chipbreaker	Material No.	Available
CNMG 160608-909+ GTCP135	…-909+	MM11854346	●
CNMG 160612-909+ GTCP135	…-909+	MM11854348	●
CNMG 190612-909+ GTCP135	…-909+	MM11854758	●
CNMG 190616-909+ GTCP135	…-909+	MM11861937	●
SNMG 150612-909+ GTCP135	…-909+	MM11855112	●
SNMG 190612-909+ GTCP135	…-909+	MM11855116	●
RCMT 1606MOSN-XR GTCP135	…-XR	MM11855079	●
RCMT 2006MOSN-XR GTCP135	…-XR	MM11855082	●

Cutting data — general cutting parameters by workpiece material

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Group	Type / alloy	Hardness HB	GTCP125 vc	GTCP135 vc	GTCK120 vc
P	Non-alloyed steel 0–0.45% C	150–250	170–240	170–190	200–340
P	Low-alloyed steel	250–300	100–190	90–150	150–290
P	High-alloyed steel	200	130–210	120–200	150–290
P	Corrosion-resistant steel	200	130–210	140–180	160–290
M	Ferritic stainless	200	140–210	140–200	–
M	Austenitic stainless	180	100–210	110–190	–
M	Duplex stainless	230–260	–	80–150	–
M	Martensitic stainless	330	70–100	55–75	–
K	Grey cast iron	180	130–210	–	150–400
K	Spheroidal cast iron	160	120–240	–	200–450
K	Malleable/tempered iron	130	150–250	–	200–550

GTCK120 grade recommended for cast iron only; consistent and inconsistent cutting depth, not interrupted cuts.