Final Work; Screw­connection Classes, Tightening Torques And Initial-Tensioning Forces; Screw­connection Classes - Siemens FLENDER PLANUREX 2 PBUC Series Assembly And Operating Instructions Manual

6.11

Final work

• After installation of the gear unit check all screw connections for tight fit.
• Check the alignment after tightening the fastening elements (the alignment must not have been
changed).
• Check that all the devices which have been demounted for transport reasons have been refitted.
─ For this refer to the details in the data sheet, the list of equipment and the associated drawings.
• Any oil drain cocks must be secured against accidental opening.
• The gear unit must be protected against falling objects.
• Protective devices for rotating parts must be checked for correct seating. Contact with rotating parts
is not permitted.
• A potential equalisation in accordance with the applying regulations and directives must be carried out!
If no threaded holes for earth connection are available on the gear unit, other appropriate measures
must be taken. This work must always be done by electrotechnical specialists.
• Cable entries should be protected against moisture.
• Check that protective measures have been taken!
6.12 Screw­connection classes, tightening torques and initial-tensioning forces
6.12.1 Screw­connection classes
The specified screw connections are to be fastened applying the tightening torques specified in the table
below:
Table 9: Screw­connection classes
Screw­connection
class
C
D
E
Foundation bolts, hub bolts and bearing cover bolts must always be tightened in
accordance with screw­connection class "C"!
Distribution of
emitted torque
on the tool
‐ hydraulic tightening with mechanical screwdriver.
­ torque­controlled tightening with torque wrench,
± 5 % up to ± 10 %
signal­emitting torque wrench.
­ tightening with precision mechanical screwdriver
with dynamic torque measuring.
± 10 % up to ± 20 %
‐ torque­controlled tightening with mechanical screwdriver.
‐ tightening with pulse screwdriver or impact wrench
without adjustment checking device.
± 20 % up to ± 50 %
­ tightening by hand, using a spanner without torque
measuring device.
BA 9213 en 03/2012
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Tightening procedure
(Usually the tightening processes lie
within the stated tool distribution)