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Product information
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Recommendations
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Product data Page ............. 3 Lubrication Page ............. 32 Relubrication intervals
Diagram 1 Under normal conditions the relubrica-
tion interval t (158°F) (27°F) , the relubrication interval maybe extended.Where bearings having bore dia-meters larger than some 300 mm are
concerned, the high specific loads
mean that adequate lubricant supply to
the rolling contacts can only be secured
if relubrication is more frequent than
suggested by the diagram. For this
reason the relevant curves are shown
as dashed lines. In such cases continu-
ous relubrication is recommended. above the reference tem-perature.At temperatures below 70 °C
t f operating hours
n r/min f can be determined from Diagram
1 based on (158°F) .
Lubricating greases age with timeand this process is accelerated at elevated temperatures. Therefore, the
relubrication interval obtained from the
diagram should be halved for every 15 °C
4 •the rotational speed n and•the bearing bore diameter d.
24610 2
3 The diagram is valid for bearings,which are lubricated with a quality
lithium base grease, on horizontal
shafts in stationary machines where
loads are normal and the operating
temperature does not exceed the
“reference temperature” for the grease; this is usually 70 °C
d = 20 mm 40 60 100 120 80 200 160 280 240 360 420 500 1,5
1,5
2,523456810 2 1,52345678910 10 1 10234567891022345678910 2 34 Example A spherical roller bearing with a bore diameter (d) of 100 mm rotates at 1 000 r/min.The operating temperature varies between 60 and 70 °C (140 to 158 °F). What is the correct relubrication interval?Follow the line from 10 3 on the speed (x) axis to the intersection of the curve for d = 100 mm. Then follow a line from this intersection horizontally across to the value of t f which is approximately 2 000. The relubrication interval is therefore 2 000 operating hours. Technical data for SKF grease LGEP 2Relubrication intervals for grease lubricated spherical roller bearings Table 1 PropertySKF grease LGEP 2 − 20 to + 110 ( − 4 to + 230)Reference temperature, °C (°F)60 (140)Dropping point toISO 2176, °C (°F) min. 180 (356) Kinematic viscosity of base oilat 40 °C, mm Consistency (NLGI Scale) 2 Soap base lithium Colour light brown
Base oil mineral Operating temperaturerange, °C (°F) See also “SKFInteractive Engineering Catalogue”orSKF
“General Catalogue”.
2 /s 200 at 100 °C, mm 2 /s16 29