651018854 12/2015 V01
Pre selection conditions
Load Confirmation Catalogue value Unit
Load max. rotation speed (n
2
) ≤ n
max
Max. output speed [rpm]
Load moment of inertia (J
L
) ≤ 3J
Out
1)
Moment of inertia [kgm
2
]
Coefficient of friction µ
m [kg]
Load torque T
L
[Nm]
Ball screw moment of inertia J
S
[kgm
2
]
Pitch P [m]
Efficiency η
J
L
[kgm
2
]
T
L
[Nm]
Coefficient of friction of bearing µ
m
[kg]
D [m]
r [m]
Speed pattern
Torque pattern
n
2
Speed n [rpm]
T
1
T
2
T
3
t
1
t
2
t
3
t
P
Torque T [Nm]
Operational cycle t
0
Note t
1
= t
3
Time t [s]
Time t [s]
T
L
= µ
.
m
.
g
.
r [Nm] g = 9,81 [m/s
2
]
J
L
=
m
8
.
D
2
[kgm
2
]
1)
J
L
≤ 3
.
J
Out
is recommended for highly dynamic applications (high responsiveness and accuracy).
Linear horizontal motion
Rotary motion
Table 65.1
Illustration 65.2
Illustration 65.4
Illustration 65.6
Equation 65.3
Equation 65.5
(
)
2
J
L
= J
S
+ m
P
2π
[kgm
2
]
µ
.
m
.
P
.
g
2π
.
η
T
L
=
[Nm]
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