42
1021387 12/2018
V02
4.7 Output Bearing Operating Life
The operating life of the output bearing can be calculated using equation 42.1.
with:
L
10
[h]
= Operating life
n
av
[rpm] = Average output speed (equation 42.2)
C [N]
= Dynamic load rating see section 3.3.6
P
C
[N]
= Dynamic equivalent load (equation 43.1)
f
W
= Operating factor (table 42.3)
B
= Bearing type (table 42.4)
Average Output Speed
n
av
=
|
n
1
|
t
1
+
|
n
2
|
t
2
+ ... +
|
n
n
|
t
n
t
1
+ t
2
+ ... + t
n
+ t
p
Load conditions
f
W
No impact loads or vibrations
1 ...1.2
Normal rotating, normal loads
1.2 ... 1.5
Impact loads and / or vibrations
1.5 ... 3
Table 42.3
L
10
=
10
6
60 . n
av
.
( )
B
C
f
w
. P
C
Equation 42.1
Equation 42.2
Bearing type
B
Cross roller bearings
10
3
Four point contact bearings
3
Table 42.4
