Owner manual

118
Turning
D
m
= Machined diameter mm
v
c
= Cutting speed m/min
n = Spindle speed r/min
T
c
= Machining time min
Q = Metal removal rate cm
3
/min
l
m
= Machined length mm
P
c
= Net power kW
k
c 0,4
= Specific cutting force for chip N/mm
2
thickness 0.4 mm
f
n
= Feed per revolution mm/r
κ
r
= Entering angle degree
R
max
= Profile depth µm
r
ε
= Insert nose radius mm
a
p
= Depth of cut mm
h
ex
= Max chip thickness mm
SCL = Spiral Cutting Length m
Terminology and units
SCL (Spiral Cutting Length) – input info in mm – result in m
External or internal turning Facing Taper cutting
How to calculate: l
m2
Formulas
Cutting speed (m/min)
Spindle speed (r/min)
Metal removal rate
(cm
3
/min)
Machining time (min)
Power requirement (kW)
Profile depth (µm)
max
Max chip thickness
Constant n
Insert shapes:
C, D, S, T, V, W
Round inserts
Machining time (min)
Technical data
SCL =
D
m
x π
x
l
m
1000 f
n
SCL =
D
m1
+D
m2
x
π
x
l
m1
2 1000 f
n
( )
SCL =
D
m1
+D
m2
x
π
x
l
m2
2 1000 f
n
( )
l
m2
=
√
(l
m1
)
2
+
(
D
m1
- D
m2
)
2
2
v
c
=
D
m
× π × n
1000
n =
v
c
× 1000
π × D
m
Q = v
c
× a
p
× f
n
P
c
=
v
c
× a
p
× f
n
× k
c 0.4
0.4
0.29
60 × 10
3
f
n
×
sin
κ
r
R =
f
n
2
× 125
r
ε



h
ex
= f
n
×
sin
κ
r
h
ex
=
f
n
×
√
4a
p
–
(
2a
p
)
2
SCL
v
c
T
c
=



iC iC
T
c
=
l
m
f
n
× n