Page 502 - SKF-bearing-housings

Non-split plummer block housings and take-up housings SBD and THD series

Lubrication Grease quantities for an 80% fill are listed in
table 4, page 499. The values are valid for a
3
SBD plummer (pillow) block housings and THD typical lithium grease (about 0,95 g/cm ) and
take-up housings are intended for grease include the grease for the bearing.
lubrication. The lubricant should be selected In most applications, the initial grease fill
based on the operating conditions of the bear- will adequately lubricate the bearing until the
ing. For additional information about lubricant grease is exchanged during the next planned
selection, refer to the product information maintenance interval.
available online at skf.com/bearings.
Relubrication
Initial grease fill Some high speed, high temperature or heavy
If no other requirements exist, the free space load applications may require the bearing to
in the bearing should be completely filled with be relubricated. SBD plummer block housings
grease and the free space in the housing and THD take-up housings have a button
should be filled to 70 to 80% of its volume. head grease fitting to lubricate the bearing in
At speeds above 1/3 of the bearing limiting accordance with DIN 3404 († figs. 9 and 10).
speed, the values in table 4 should be reduced SBD housings have the grease fitting centred
by 20 to 30% to avoid high operating tempera- at the top of the housing body, while THD
tures. For bearing limiting speeds, refer to the housings have the grease fitting centered on
product information available online at the side of the housing body.
skf.com/bearings. The grease fitting can only be used to
For highly contaminated environments, use relubricate spherical roller bearings with a
the SKF three-barrier solution († page 39). relubrication feature (a lubrication groove and
In this case, check that the housing can accom- holes in the outer ring). When applying grease
modate sealed, self-aligning SKF bearings. For via the relubrication feature, the shaft should
additional information, contact the SKF appli- be rotating.
cation engineering service. CARB toroidal roller bearings should be
relubricated from the side and not via the

Fig. 9 Fig. 10

Grease fitting in SBD housing Grease fitting in THD housing

498