Page 82 - SKF-bearing-housings

Split plummer block housings SNL 2, 3, 5 and 6 series

Lubrication grease fill is used when bearings are relubri-
cated via the outer ring.
SNL plummer (pillow) block housings in the 2, For highly contaminated environments and
3, 5 and 6 series with standard seals are slow speeds, fill the housing to 70–80%. For
intended for grease lubrication. For oil lubrica- best protection against contaminants, use the
tion, housings with oil seals († page 64) or SKF three-barrier solution († page 39). For
SONL plummer block housings († page 349) additional information, contact the SKF appli-
should be used. cation engineering service.
The lubricant should be selected based on Quantities for 20 and 40% grease fills
the operating conditions of the bearing. For are listed table 11. The values are valid for
3
additional information about lubricant selec- a typical lithium grease (about 0,95 g/cm ).
tion, refer to the product information available They include grease for the bearing and the
online at skf.com. 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.
Initial grease fill For sealed bearings, the values have to be
If no other requirements exist, the free space adjusted.
in the bearing should be completely filled with In most applications, the initial grease fill
grease and the free space in the housing should will adequately lubricate the bearing until the
be filled to 20 to 40% of its volume. A 40% grease is exchanged during the next planned
grease fill is required when bearings have to maintenance interval.
be relubricated from the side, while a 20%
Relubrication
Table 11 SNL plummer block housings enable relubri-
Initial grease fill cation of the incorporated bearings and seals
(† fig. 11):
Housing Initial fill
Size 20% 40%
• SNL housings have two holes that have
– g
been drilled and tapped for an AH 1/8-27
PTF grease fitting. On a new housing, the
SNL 205 SNL 505 15 25
SNL 206-305 SNL 506-605 25 40 holes are covered by plastic plugs. These
SE 207 SE 507-606 30 50 plugs should be replaced with the grease
SE 208-307 SE 508-607 35 55 fitting and threaded plug supplied with the
SE 209 SE 509 40 60 housing.
SE 210 SE 510-608 45 70
• If a larger grease fitting or other equipment
(F)SE 211 (F)SE 511-609 55 90 has to be used, an adapter to change to a
(F)SE 212 (F)SE 512-610 80 135
(F)SE 213 (F)SE 513-611 100 160 G 1/4 thread is available († page 47).
• Dimples cast into the top of the housing cap
(F)SE 215 (F)SE 515-612 125 210
(F)SNL 216 (F)SNL 516-613 170 280 indicate alternative positions where holes
(F)SNL 217 (F)SNL 517 200 330 can be drilled and tapped to accommodate
a grease fitting for bearing or seal
(F)SNL 218 (F)SNL 518-615 260 430
(F)SNL 519-616 300 480 relubrication.
(F)SNL 520-617 390 630
(F)SNL 522-619 530 850
(F)SNL 524-620 630 1 000
(F)SNL 526 700 1 100
(F)SNL 528 900 1 400
(F)SNL 530 1 100 1 700
(F)SNL 532 1 300 2 000

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