TopGroove ™
Catalogue Numbering System
TopGroove ™
Holder Identifi cation System
NSR2525M4
N S R
Insert
Holding
Method Insert
Mounting
Location Hand
of Tool
N —
TopGroove*
2525 M 4
Shank
Size Tool Length Insert
Size
Drop
Head
End mount
Shank height
and width in mm
and holder length
according to ISO
standard.
E E
Side mount
Offset
*Proprietary
standard only.
S S
Side mount
No offset
for swiss
machining
DH
AS
AS
DH = Drop Head
NRR undercut
ISO
32
40
50
60
70
80
90
100
110
125
140
150
160
170
180
200
250
300
350
400
450
500 A
B
C
D
E
F
G
H
I
J
K
L
M
N
P
Q
R
S
T
U
V
W
Y
Special
Length
W1
insert
size
2
3
4
5
6
8
W1
3,81mm
4,95mm
6,98mm
9,65mm
9,73mm
11,13mm
X
Q —
qualifi ed metric holder
End mount
R
L1
Qualifi ed
Surface and
Length
L L
Side mount
R
L
NOTE: Holders are designed to locate
insert inclined to 3° to provide back
clearance down open side.
widia.com
E73
back clearance