Monorail Guidance Systems

Lubrication
Calculation of lubrication
interval
Grease operating life Since it is not possible to calculate all the influencing factors, the
precise grease operating life can only be determined under actual
operating conditions. The approximation formula below, however,
can be used to determine a guide value for many applications:
tfG = tf⋅KP⋅KW⋅KU tfG h
Guide value for grease operating life in operating hours
tf h
Factor for basic lubrication interval in operating hours, Figure 2
KP, KW, KU –
Correction factors for load, stroke and environment, page 49 and page 50.
Attention! The grease operating life is restricted to a maximum of three years
due to the ageing resistance of the grease.
Basic lubrication interval The basic lubrication interval t f is valid under the following
conditions, Figure 2:
■ a bearing temperature of +70 °C
■ a load ratio C 0/P = 20
■ no disruptive environmental influences
■ a stroke ratio between 10 and 50, page 50.
Speed parameter The speed parameter is defined as follows:
t f = basic lubrication interval
GKW = speed parameter
Relubrication possible
Regreasing required
Figure 2
Determination
of the basic lubrication interval
60
GKW = ⋅KLF
v
GKW –
Speed parameter, Figure 2
v m/min
Mean travel velocity
KLF –
Bearing factor, see table, page 49.
t f
80 000
h
40 000
20 000
10 000
8 000
6 000
4 000
2 000
1 000
800
600
400
200 0,5 1 2 3 4 5 6 7 8 910 20
48 PF 1 Schaeffler Group Industrial
2
GKW
1
155 237a