n
1m
Average speed for phase t
H1
+ t
1
+ t
B1
+ t
11
n
2m
Average speed for phase t
H2
+ t
2
+ t
B2
+ t
22
n
1
; n
2
Processing speed
t
H1
; t
H2
Run-up time
t
1
; t
2
Processing time
t
B1
; t
B2
Braking time
t
11
; t
22
Standstill time
Fig. 7-27: Average speed
A complete processing cycle can consist of several phases with different
speeds. In this case, the average is to be generated from all phases.
Bearing service life
The nominal service life of the bearings is L10h > 30,000 h (according to
DIN ISO 281, ed. 1990), if the permissible radial and axial forces are not
exceeded.
Risk of damage by inadmissible loads!
Possible consequences of inadmissible loads: Premature failure of the
bearings due to increased wear or mechanical damage.
Avoid exceeding the load limits.
Mechanical bearing service life at
increased radial force
Otherwise, the bearing service life is reduced as follows:
L
10h
Bearing service life (according to ISO 281, ed. 12/1990)
F
radial
Determined allowed radial force in N (newton)
F
radial_ist
Actually acting radial force in N (newton)
Fig. 7-28: Calculating the bearing service life L10h if the allowed radial force
F
radial
is exceeded
Under no circumstances may the actually acting radial force
F
radial_act
be higher than the maximum allowed radial force
F
radial_max
.
252/407
Notes on project planning
IndraDrive Mi Drive Systems with KCU02, KSM02,
KMS02/03, KMV03, KNK03, KLC03
Bosch Rexroth AG R911335703_Edition 04
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