Siemens SINAMICS S120 Configuration Manual page 47

Table 3- 8
abbreviation
c
F
R
F
U
P
n
D
1PH410⃞, duplex bearing (standard)
Maximum continuous speed
Max. speed
Figure 3-2
Permissible for continuous operation with shorter bearing lifetime
1)
1PH4 Induction Motors
Configuration Manual, (APH4S), 08/2008, 6SN1197-0AD64-0BP1
Explanation of the formula abbreviations
Formula Unit
---
N
N
kW
rpm
mm
Permissible radial force F
lifetime of 20 000 h.
Pre-tensioning factor: The pre-tensioning factor is an empirical value
provided by the belt manufacturer. The following value can be
assumed:
for V belts: c = 1.5 to 2.5
for special plastic belts (flat belts) depending on the type of load and
belt: c = 2.0 to 2.5
Radial force
Circumferential force
Motor output
Motor speed
Diameter of belt pulley
n = 5600 rpm
s1
n = 7500 rpm
max
at a distance x from the shaft shoulder for a nominal bearing
R
Mechanical properties of the motors
3.4 Radial force (transverse force)
Description
47