Laydown Threading
Catalogue Numbering System
Laydown Threading
Toolholder Identifi cation System
AL253R
A L 25 3 R
Toolholder
Construction Tool Type Shank Size Insert
Size Hand of
Tool
A —
Shim required
N —
Without shim
RH —
Thread symbol R
Toolholders
• First two numbers
are shank height
in mm.
LH —
Thread symbol L
L — External Thread
d
widia.com
symbol d L1
2 6,35 11
3 9,52 16
4 12,7 22
5 15,88 27
F69
L1