WIDIA ™ Inserts
Catalogue Numbering System
How Do Catalogue Numbers Work?
Each character in our catalogue number signifi es a specifi c
trait of that product. Use the following key columns and
corresponding images to easily identify which attributes apply.
CNMG120408UR
C N M G 12
Insert Shape Insert Clearance
Angle Tolerance
Class Insert
Features Size
Code for mm
cutting edge length
“L10”
N
H
Hexagon
120°
Tolerances apply prior
to edge prep and coating
A
R
“D”
mm
F
C
D
R
S
T
V
W
3,97 S4 04 03 03 06 — —
O
Octagon
135°
A
B
4,76 04 05 04 04 08 08 S3
5,56 05 06 05 05 09 09 03
M
P
Pentagon
108°
6,00 — — 06 — — — —
6,35 06 07 06 06 11 11 04
G
C
7,94 08 09 07 07 13 13 05
R ε
R ε
W
8,00 — — 08 — — — —
9,52 09 11 09 09 16 16 06
T
R
Round
—
10,00 — — 10 — — — —
D
Q
11,11 11 13 11 11 19 19 07
12,00 — — 12 — — — —
U
E
15,88 16 19 15 15 27 27 10
H
R ε
T
Triangular
60°
19,05 19 23 19 19 33 33 13
20,00 — — 20 — — — —
J
22,22 22 27 22 22 38 38 15
G
W Trigon
80°
with enlarged
corner angles N
Rectangular
90° P
B4
17,46 17 21 17 17 30 30 11
F
Rhomboid
80°
55°
75°
86°
35°
A
B
N/K
16,00 — — 16 — — — —
C
C
D
E
M
V
L
14,29 14 17 14 14 24 24 09
B
Parallelogram
85°
82°
55°
D = Theoretical diameter
of the insert inscribed
circle
S = Thickness
B = See fi gures below
tolerance
class
O
Indicated for other
clearance angles
requiring descriptions.
X
V
Special
Design
25,00 — — 25 — — — —
25,40 25 31 25 25 44 44 17
31,75 32 38 31 31 54 54 21
32,00 — — 32 — — — —
tolerance
on “D”
tolerance
on “B”
tolerance
on “S”
C ±0,025 ±0,013 ±0,025
H ±0,013 ±0,013 ±0,025
E ±0,025 ±0,025 ±0,025
G ±0,025 ±0,025 ±0,013
M See tables on next page ±0,013
U See tables on next page ±0,013
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S
Square
90°
12,70 12 15 12 12 22 22 08