Cutting Edge Position Dimension
■ Cutting Position Dimension and Nose Radius ● Cutting position dimension by nose radius (ISO standard)
(Values for X and Y in the table are with lateral rake angle and cutting edge angle of 0°.)
Dimensions ( mm )
Dimensions ( mm )
Tool Shape
Tool Shape
RE X Y 0.4 0.291 — 0.8 0.581 — 1.2 0.872 — 1.6 1.162 — 2.4 1.743 — 0.4 0.089 0.024 0.8 0.178 0.048 1.2 0.268 0.072 1.6 0.357 0.096 2.4 0.535 0.143 0.4 0.164 0.164 0.8 0.329 0.329 1.2 0.493 0.493 1.6 0.658 0.658 2.4 0.986 0.986 0.4 0.396 0.229 0.8 0.793 0.458 1.2 1.190 0.687 1.6 1.587 0.916 2.4 2.381 1.374 0.4 — 0.291 0.8 — 0.581 1.2 — 0.872 1.6 — 1.162 2.4 — 1.743 0.4 0.291 — 0.8 0.581 — 1.2 0.872 — 1.6 1.162 — 2.4 1.743 — 0.4 0.344 0.033 0.8 0.687 0.079 1.2 1.031 0.118 1.6 1.375 0.157 2.4 2.062 0.236
RE X Y
Symbol
Shape
Close-up of Cutting Edge
Symbol
Shape
Close-up of Cutting Edge
0.4 0.024 0.089 0.8 0.048 0.178 1.2 0.072 0.268 1.6 0.096 0.357 2.4 0.143 0.535 0.4 0.040 0.040 0.8 0.079 0.079 1.2 0.119 0.119 1.6 0.159 0.159 2.4 0.238 0.238 0.4 0.463 0.263 0.8 0.925 0.471 1.2 1.388 0.707 1.6 1.850 0.943 2.4 2.776 1.414 0.4 0.164 0.164 0.8 0.329 0.329 1.2 0.493 0.493 1.6 0.658 0.658 2.4 0.986 0.986 0.4 0.396 0.229 0.8 0.793 0.458 1.2 1.190 0.687 1.6 1.587 0.916 2.4 2.381 1.374 0.4 0.253 0.058 0.8 0.506 0.116 1.2 0.759 0.175 1.6 1.013 0.233 2.4 1.519 0.350 0.4 0.002 0.033 0.8 0.005 0.066 1.2 0.008 0.099 1.6 0.011 0.132 2.4 0.017 0.198
RE
75˚
A
K
RE
LF
X
X
LF
90°
C
95˚
B
L
R RE
RE
95˚
75˚
LF
LF
X
X
RE
D
N
RE
X
45˚
LF
LF
X
RE
RE
RE
E
S
45˚
C
X
60˚
LF
LF
X
OAL
D
RE
F
T
RE
90˚
60˚
LF
X
LF
R
95˚
RE
RE
G
U
S
LF
X
LF
90˚
X
55˚
T
RE
85˚
J
Y
RE
LF
X
X
LF
93˚
V
● Nose radius position calculation
Values of IC and RE for the Calculation of B ( mm )
Calculation Formula for Nose Radius Position
( mm )
Inscribed Circle Nominal Value IC for Calculation 3.97 3.9688 4.76 4.7625 5.56 5.5562 6.35 6.3500 7.94 7.9375
Shape
Formula
Nose Radius Nominal Value RE for Calculation 02 0.2 0.203 04 0.4 0.397 08 0.8 0.794 12 1.2 1.191 16 1.6 1.588 24 2.4 2.381
W
RE ø d
Triangular Type
B = 3/2 d – RE
RE
Square Type
ø d
B=( 2–1)×( d /2 – RE)
9.525 9.5250 12.70 12.7000 15.875 15.8750 19.05 19.0500 25.40 25.4000
RE
Diamond Type
ø d
B = (1/Sin( θ /2) – 1) × ( d /2 – RE)
C4
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