28
06.2019
8.2 Lubrication
Operating manual
Centrifugal fans
HF R | RV | MRV
www.hlu.eu
The lubrication points of the fans have to be greased regularly using appropriated lubrication
tools. The lubrication periods depend on the operating hours of the fan (see next schedule).
J The bearings of the installed maintenance-free electric motors have a grease lling, which
is calculated for a service life of approx. 10.000 - 20.000 operating hours. The maintenan-
ce-free ange double bearings (299 T ...W, 399 T ...W), were lled with grease suciently
by the manufacturers, this means they have a calculated service life of approx. 20000 ope-
rating hours.
J The periods and amount of the lubrication on the electric motor and regreasable double
ange bearings 399T…N and block bearing 32T…ER depend on the operating hours of the
fan. After max. 8000 operating hours at the latest after one year of operation the bearings
have to be greased again according to the next schedule.
J We recommend as appropriated bearing grease a lithium soap grease, for example Shell-Al-
vania 2 or 3. The determined lubrication intervals are applicable to bearings in horizontal
mounting position at a maximum temperature of 70 °C. As lubricant aging is accelerated
at higher temperatures, the lubrication interval must be reduced by half with a temperature
increase of 15 °C.
J Concerning the lubrication intervals of electric motors please note the operating and main-
tenance instructions of the engine producer.
Details about the kind, amount and period of lubrication of the single
purchase component devices have to be taken from the external ma-
nufacturer’s operating manual.
Greasing periods depending on the speed and nominal size of the fan:
Nominal fan
size
Speed fan
Quantity
of grea-
sing
2000
min-1
2500
min-1
3000
min-1
3500
min-1
HF R 250-17
8000 h 7000 h 5500 h 4500 h
8 g
Only the fan type HF R 250-17 R with a speed over 2000 min-1 has got a regreasable bearing
installed.
HF R ...-15 / 17 D / R
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