Page 369 - SKF-bearing-housings

Lubrication

Precaution after machine stops Oil cooling tubes
Before start-up, the oil level should be filled to In high temperature applications, where an oil
the maximum mark on the oil level gauge. This pick-up ring is used, auxiliary cooling tubes
is even more important after longer machine should be installed († fig. 14, page 366).
stops to avoid the possibility of dry-running They use water, which has to be provided via
the bearing until the oil pick-up ring delivers an external system, to cool the oil in the hous-
a sufficient amount of lubricant. ing. The pressure of the cooling medium
After shorter machine stops, a sufficient should not exceed 4 bar.
amount of oil remains in the oil sump and in the Oil cooling tubes are available in different
bearing to provide lubricant during start-up. sizes († table 6). Depending on the need, one
or two cooling tubes can be installed via the oil
Magnetic plugs outlet holes in the housing base. Detailed
Each seal kit contains a magnetic plug. The mounting instructions are provided with the
plug can be fitted in one of the oil outlet holes products.
in the housing base. The plug attracts metal Oil cooling tubes are identified by the basic
contaminants in the oil, to extend bearing designation AVA-0001 followed by a size
service life. identification, e.g. AVA-0001/3.
7
Special oil pick-up ring for use on shafts with Oil outlets
electromagnetic clutches Tapped holes in the housing base that are not
If shafts with electromagnetic clutches are to used for the oil level gauge or cooling tubes
be supported in SONL housings, the standard can be used as oil outlets.
steel oil pick-up ring must be replaced by a
brass ring (GH-TSO ...-.../MB). Appropriate
brass rings are listed in table 5.

Table 5
Brass oil pick-up rings
Housing Pick-up ring
Size Designation
217-517 GH-TSO 217-517/MB
218-518 GH-TSO 218-518/MB
220-520 GH-TSO 220-520/MB
222-522 GH-TSO 222-522/MB
224-524 GH-TSO 224-524/MB
226-526 GH-TSO 226-526/MB
228-528 GH-TSO 228-528/MB
230-530 GH-TSO 230-530/MB
232-532 GH-TSO 232-532/MB
Table 6
234-534 GH-TSO 234-534/MB
236-536 GH-TSO 236-536/MB Oil cooling tubes
238-538 GH-TSO 238-538/MB
Housing Oil cooling tube
240-540 GH-TSO 240-540/MB Size Designation
244-544 GH-TSO 244-544/MB
248-548 GH-TSO 248-548/MB 217-517 and 218-518 AVA-0001/1
220-520 and 222-522 AVA-0001/2
224-524 to 232-532 AVA-0001/3
234-534 to 248-548 AVA-0001/4

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