TURNING INSERTS CODE KEY | ANSI DESIGNATION
EXAMPLE 1
C 1
N 2
M 3
G 4
4 5
3 6
2 7
QM 9
–
8
2 Clearance Angle
1 Insert Shape
C 80 0 Diamond
D 55 0 Diamond
5 0 Positive Rake
B
S Square
C
7 0 Positive Rake
T Triangle
N
0 0 Negative Rake
V 35 0 Diamond
11 0 Positive Rake
P
W 80 0 Corner Trigon
3 Tolerances, inch
Tolerance Class
tolerance on ' d '
tolerance on ' B '
tolerance on ' s '
± .001
± . 001
± .005
G
± .005
M
see table below
see table below
Tolerance Class M, inch
tolerance on 'd'
tolerance on ‘B’
d
All Shapes ± .002 ± . 002 ± .002 ± .003 ± .004 ± .004
C, S, T, W Shapes
D Shape ± .004 ± .004 ± .004 ± .006 ± .007 ± .007
V Shape
± .003 ± .003 ± .003 ± .005 ± .006 ± .006
7/32
N/A
± .007 ± .007 ± .010
1/4
3/8
1/2
5/8
N/A
N/A
3/4
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