REXROTH EcoDrive Cs - Page 155

Rexroth EcoDrive Cs Drives Motors 8-33
DOK-ECODR3-DKC**.3-CS*-PR02-EN-P
Bearing service life
If the MSM motors are operated within the limits specified for radial and
axial loads, the nominal service life of the bearings is as follows:
L
10h
= 20.000 operating hours
In other cases, the bearing service life is reduced as follows:
20000
F
F
L
3
ist_radial
radial
h10
⋅








=
L
10h
: (Bearing service life according to ISO 281, ed. 12/1990)
F
radial
: Determined permissible radial force in N (Newton)
F
radial_ist
: Actually acting radial force in N (Newton)
Fig. 8-44: Calculation of the bearing service life L
10h
if the permissible radial force
F
radial
is exceeded
Note: Under no circumstances may the actually acting radial force
F
radial_ist
be higher than the maximum permissible radial force
F
radial_max
.
motor_lager_lebensdauer.fh7
radial force [%]
service life [h]
0
20 40 60 80 1000
10000
5000
15000
20000
25000
30000
A
B
C
D
A: at 70% of maximum permissible axial force
B: at 80% of maximum permissible axial force
C: at 90% of maximum permissible axial force
D: at 100% of maximum permissible axial force
Abb. 8-45: Bearing service life depending on radial and axial force
Nominal bearing service life
Courtesy of CMA/Flodyne/Hydradyne ▪ Motion Control ▪ Hydraulic ▪ Pneumatic ▪ Electrical ▪ Mechanical ▪ (800) 426-5480 ▪ www.cmafh.com