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High-Performance Solid Carbide End Mills • Hard Materials
Series 70N7 • >52 HRC • Vision Plus ™ X-Feed ™
• Non-centre cutting.
• Standard items listed. Additional styles
and coatings made-to-order.
End Mill Tolerances
D tolerance h6
+ / -
-0,014/-0,028 ) 3 0/0,006
-0,020/-0,038 > 3–6 0/0,008
D1 tolerance e8
) 3 > 3–6 > 6–10 -0,025/-0,047 > 6–10 0/0,009
> 10–18 -0,032/-0,059 > 10–18 0/0,011
> 18–30 -0,040/-0,073 > 18–30 0/0,013
„ 
Series 70N7 • >52 HRC • Vision Plus X-Feed
 first choice
 alternate choice
order # catalogue # D1 D D3 length of cut
Ap1 max L3 length
L R¡ Rt
3484756 70N706002MT 6,0 6 5,50 0,20 18,00 63 0,38 0,58
3484757 70N708003MT 8,0 8 7,50 0,27 24,00 76 0,50 0,77
3484758 70N710004MT 10,0 10 9,00 0,33 30,00 89 0,63 0,96
3403492 70N712005MT 12,0 12 11,00 0,40 36,00 100 0,75 1,15
3477329 70N716006MT 16,0 16 15,00 0,54 48,00 110 1,00 1,54
3484759 70N720007MT 20,0 20 19,00 0,67 60,00 125 1,25 1,92
grade
AlTiN-MT1
AlTiN-MT1
AlTiN
NOTE: YRC = distance from centre line to the crown of the R radius.
RCN = distance from centre line to the start of the cutting edge. This dimension can also help determine the minimum circle size when helical ramping.
R = the head radius size.
R¡ = the shoulder radius or radius at the corner of the cutter.
„ 
Programming Data
Tool List 70N7
Geometrical Parameters
Circular Interpolation Linear Interpolation
Allowed Range of
Hole Diameter Calculated Length (mm) per Ramp Angle
diameter Ap1 max Rfm Rt Rc Xfm Yfm YD Number [mm] [mm] [mm] [mm] [mm] [mm] [mm] [mm] flutes Smallest Largest 1 2 3 4 5
6 0,20 9 0,58 0,375 0,20 0,75 1,26 6 8,52 12 11,51 5,75 3,83 2,87 2,30
8 0,27 12 0,77 0,500 0,27 1,00 1,68 6 11,36 16 15,34 7,67 5,11 3,83 3,06
10 0,33 15 0,96 0,625 0,33 1,25 2,10 6 14,2 20 19,18 9,58 6,39 4,79 3,83
12 0,40 18 1,15 0,750 0,40 1,50 2,52 6 17,04 24 23,01 11,50 7,66 5,74 4,59
16 0,54 24 1,54 1,000 0,54 2,00 3,36 6 22,72 32 30,68 15,34 10,22 7,66 6,12
20 0,67 30 1,92 1,250 0,67 2,50 4,20 6 28,4 40 38,35 19,17 12,77 9,57 7,65
100% 70% 50% 30% 10%
Recommended Feed
widia.com
Ramp Angle (degree)
O153
Ramping Guide for Circular and Linear Interpolation