BA 5230 en 04/2011
To avoid overloading the individual bolts, the maximum tightening torque (see table 9)
must not be exceeded. If, when tightening the clamping bolts at max. tightening
torque, the inner and outer ring are not aligned, Siemens must be consulted.
Table 9:
Maximum torques for tensioning bolts
Tensioning-bolt
thread
Max. tightening torque
per bolt
Tensioning-bolt
thread
Max. tightening torque
per bolt
Strength class 12.9
Nm
Strength class 12.9
Nm
M 8
35
M 20
570
M 10
70
M 24
980
M 12
120
M 27
1450
M 14
193
M 30
1970
M 16
295
M 33
2650
The shrink disk has been identitymarked on the outer ring (4). In case of contacting Siemens
this identification must be referred to.
For safety reasons, a protective cover should be fitted to prevent contact!
This cover must be applied after completion of all works on the shrink disk.
Only the complete shrink disks supplied by the manufacturer may be used. Combining
components from different shrink disks is not permitted.
Tightening the fastening bolts using an impact screwdriver is not permitted!
6.6.2
Demounting the shrink disk
•
Remove the protective cover.
•
Remove any rust deposits from the shaft and the hollow shaft.
Under no circumstances must the bolts be unscrewed individually one after the other.
•
Undo all tensioning bolts one after the other by approx. 1/4 turn.
The stored energy of the outer ring is slowly loosened during disassembly via the bolts to be
loosened. For this to be carried out correctly, the procedure described here must be carefully
adhered to!
•
All tensioning bolts should now be further unscrewed by loosening one after the other by approx. 1 turn.
The outer ring should now release of its own accord from the inner ring. If this is not the case,
the outer ring can be detensioned with the forcing threads. To this purpose screw some of the
adjacent fastening bolts into the forcing threads. The now releasing outer ring is braced against
the remaining bolts. This operation must be carried out until the outer ring completely releases
of its own accord.
•
The shrink disk is to be secured against axial shifting.
•
Draw the stub shaft out of the hollow shaft.
•
Pull the shrink disk off the hollow shaft.
For transporting and lifting the shrink disk it may be required to use a suitable lifting
device!
