Small Hole Boring
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.
CDHBS4T002
T
C
G
C D H B S4
Insert Shape Insert Clearance
Angle Tolerance Class Insert
Features Size
60°
Tolerances apply prior
to edge prep and coating.
B
80°
C
45°
45°
W 80°
R ε
R ε
D
Code for metric
cutting edge length
“L10”
“D”
mm C G T W
3,97
4,06
4,76
6,35
9,53
9,80 S4
—
04
06
09
— 05
—
06
—
—
— 06
07
08
11
16
17 —
—
S3
04
06
—
P
R ε
W
Partly cylindrical
hole, 40–60°
countersink,
single-sided
T
D30
tolerance
class 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
Partly cylindrical
hole, 70–90°
countersink,
single-sided
B
H
without chipbreaker
with chipbreaker
without chipbreaker
with chipbreaker
widia.com
D = Theoretical diameter of
the insert inscribed circle
S = Thickness
B = See fi gures below