Page 346 - SKF-bearing-housings

Split plummer block housings SED 30, 31, 32 and 39 series

Lubrication Relubrication
SED plummer block housings enable relubri-
SED plummer block housings are intended for cation of the incorporated bearings and seals.
both grease and circulating oil lubrication sys- They have two holes that have been drilled
tems. The lubricant should be selected based and tapped for a button-head grease fitting
on the operating conditions of the bearing. For († fig. 9). The holes are in accordance with
additional information about lubricant selec- DIN 3404 and used to relubricate spher ical
tion, refer to the product information available roller bearings with a relubrication feature (a
online at skf.com/bearings. lubrication groove and holes in the outer ring).
When applying grease via the relubrication
feature, the shaft should be rotating.
Initial grease fill
If no other requirements exist, the free space
in the bearing as well as the gaps of the laby- Grease/oil escape holes
rinth seal should be completely filled with SED housings have three drilled and tapped
grease and the free space in the housing holes in the base for evacuation of grease or
should be filled to 20% of its volume. For highly oil, as standard († fig. 6, page 335) as the
contaminated environments and slow speeds, grease or oil cannot escape via the seal if
fill the housing to 70–80%. relubrication is required.
For additional information, contact the SKF When grease lubrication is used, these
application engineering service. escape holes can also be used for spot checks
of grease quality.

Fig. 9 Oil lubrication
SED housings with the designation suffix RT
Relubrication of seal can be used for circulating oil lubrication sys-
tems. The same holes that are used for grease
relubrication (via the annular groove and
lubrication holes in the outer ring of the bear-
ing) can be used as the oil inlet.

Mounting

SED housings must be mounted properly
using the appropriate tools and state of the art
mechanical mounting methods. All the associ-
ated components must also meet certain basic
requirements († Specifications for shafts and
housing support surfaces, page 45). For infor-
mation about mounting rolling bearings, refer
to the SKF bearing maintenance handbook or
skf.com/mount.

Torque specifications
Cap, cover and attachment bolts should be
tightened to the torque values listed in tables 3
and 4, pages 339 and 340. The cover bolts are
in accordance with ISO 4017. For information
Relubrication via outer ring
about attachment bolts, refer to Attachment
bolt recommendations on page 340.
342