Internal groovingInternal grooving GMM/GMG/GMGA typeGMM/GMG/GMGA type

GMM-V insert (for KIGM-V)

Carbon steel / Alloy steelP QP
Stainless steelQ PM
Cast ironQPK
Non-ferrous metalsQN
Titanium alloyQS
Hard materials (~40 HRC)O N
H
Hard materials (40 HRC ~)
Dimension (mm)ToleranceCarbide
CVD PVD- -
InsertDescriptionApplicable toolholder
CWCW

CW S RE INSL

min. max.

GMM 3015-040V

G

2° RE

INSL 18° 18° GMM 4020-040V Chip control oriented / M class

GMM 5020-080V

2

2

2

3

4

5

4.3

4.3

4.3

0.4

0.4

0.8

15.5 - 0.05 + 0.05 UUUUUU

20 - 0.05 + 0.05 UUUUUU

20 - 0.05 + 0.05 UUUUU

KIGM&2016B-3V KIGM&2520B-3V KIGM&3225B-3V

KIGM&3225B-4V KIGM&4032B-4V

It is not recommended to use this for KIGM-V Internal Grooving Toolholders which require GMM...V / GMM...VR type inserts with the 18˚ front relief angle, because the relief angle of the insert used for GMM4020-04 toolholder is 10˚.