Page 177 - SKF-bearing-housings

Lubrication

Lubrication Table 9
Initial grease fill
SNLN 30 plummer (pillow) block housings Housing Initial fill
with standard seals are intended for grease Size 20% 40%
lubrication. – kg
The lubricant should be selected based on
the operating conditions of the bearing. For SNLN 3024 0,25 0,45 4
additional information about lubricant selec- SNLN 3026 0,35 0,65
tion, refer to the product information available SNLN 3028 0,50 0,70
online at skf.com/bearings. SNLN 3030 0,50 0,90
SNLN 3032 0,50 1,0
SNLN 3034 0,75 1,4
Initial grease fill SNLN 3036 0,95 1,8
1,9
1,0
SNLN 3038
If no other requirements exist, the free space SNLN 3040 1,1 2,0
in the bearing should be completely filled with SNLN 3044 1,5 2,7
grease and the free space in the housing SNLN 3048 1,5 2,8
should be filled to 20 to 40% of its volume. SNLN 3052 2,1 3,8
A 40% grease fill is required when bearings SNLN 3056 2,3 4,2
have to be relubricated from the side, while
a 20% grease fill is used when bearings are
relubricated via the outer ring.
For highly contaminated environments
and slow speeds, fill the housing to 70–80%.
For best protection against contaminants, use
the SKF three-barrier solution († page 39).
For additional information, contact the SKF
application engineering service.
Quantities for 20 and 40% grease fills are
listed in table 9. The values are valid for a
3
typical lithium grease (about 0,95 g/cm ). They
include grease for the bearing and the four-lip
seals or the sealing washers of V-ring seals.
The grease to fill labyrinth seals or taconite
heavy-duty seals is not included. For sealed
bearings, the values have to be adjusted.
In most applications, the initial grease fill
will adequately lubricate the bearing until the
grease is exchanged during the next planned
maintenance interval.

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