TopGroove ™
Catalogue Numbering System
TopGroove
Boring Bar Identifi cation System
A25RNNTOR2
A 25 R N N T O R 2
Bar
Type Bar
Diameter Bar
Length Insert
Holding
Method Insert
Shape Insert
Location Rake
Angle Hand
of Tool Insert
Size
Steel with
coolant
N —
TopGroove
End mount
E
A
W1
R
Right hand
Side mount
S
Bar diameter
Left hand
L
Metric Bars
widia.com
M 150mm
Q 180mm
R 200mm
S 250mm
T 300mm
U 350mm
insert
size W1
1 3,54mm
2 3,81mm
3 5,35mm
4 6,40mm
5 9,65mm
6 9,73mm
8 11,13mm
E77
Dia.