PCBN
MINI-BH
Ø D
R TYPE
F
r
MICROBORING
L
226
STRONG EDGE
PCBN
DESCRIPTION
NT-MINI-BH D3.5-L60-S3.0 R / L
D4.5-L60-S4.0 R / L
D5.5-L80-S5.0 R / L
D6.5-L80-S6.0 R / L
D7.5-L100-S7.0 R / L
D8.5-L100-S8.0 R / L
ØD Ød
3
4
5
6
7
8 3.5
4.5
5.5
6.5
7.5
8.5
r
L
0.20 60
0.20 60
0.20 80
0.20 80
0.20 100
0.20 100
NB250U
F l R
1.85
2.35
2.85
3.35
3.85
4.35 -
-
-
-
-
- h*
h*
h*
h*
f*
f*
L
NB250U NB350 NB450U
R
L
R
L
R
L
DIMENSIONS
DRILLING
*NB250U = uncoated
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