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Lubrication
Grease quantity with completely filled bearing [g]
10000
5000
2000
1000
The amount of lubricating grease in the roller bearing is determined by the bearing design. The diagram opposite
shows the amount of lubricating grease to be used at normal speed in the roller bearing in regard to the bore diameter.
For higher rev speeds the amount of grease should be reduced by up to 50%.
Lubrication intervals depend on bearing type, bearing size, and operating speed.
Make a rough estimate of the lubrication intervals of standard greases based on lithium soaps according to DIN
51825 as follows:
(1,4 ... 2) 10 9
SF = ————–— [h]
. .
dm n
k f
500
200
100
50
20
10
5
2
Bearing bore [mm]
1 2 3 4 5 6 78
1
10 70 100 200 300 500 800
S F lubrication interval [h]
kf factor for bearing type (see table)
D + d
d m mean bearing diameter d m = ————
2
[mm]
n operating speed [rpm]
9
KRW 131