Page 404 - Master Catalog 2017, Inch

Small Hole Boring
Catalog Numbering System

How Do Catalog Numbers Work?
Each character in our catalog number signifi es a specifi c trait of that
product. Use the following key columns and corresponding images
to easily identify which attributes apply.

CDHB120605

C D H B 12

Insert Shape Insert Clearance Tolerance Class Insert Size
Angle Features

Tolerances apply prior Code for inch
T 60° B to edge prep and coating.
cutting edge length
“D” “L10”
inch C G T W
C 80° 5/32 12 12 – –
C .160 – – 13 –
3/16 – 15 – 15
G 45° 45° 1/4 2 – 2 2
3/8 3 – 3 3
W 80° .386 – – 31 –
D
Rε Rε

P

Rε

without chipbreaker
D = Theoretical diameter W
of the insert inscribed Partly cylindrical
circle hole, 40–60°
S = Thickness countersink,
B = See fi gures below single-sided
with chipbreaker
T

tolerance tolerance tolerance tolerance without chipbreaker
class on “D” on “B” on “S” B
Partly cylindrical
C ±.0010" ±.0005" ±.001" hole, 70–90°
countersink,
H ±.0005" ±.0005" ±.001"
single-sided
E ±.0010" ±.0010" ±.001" with chipbreaker
H
G ±.0010" ±.0010" ±.005"
M See tables on next page ±.005"
U See tables on next page ±.005"

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