B.1 Tightening torques for screw and bolt connections
The above-mentioned tightening torques apply for the following applications:
● Case A
● Case B
● Case C
Securing the rotor (Page 38)
Applies to electrical connections in which the permissible torque is normally limited by the
bolt materials and/or the current carrying capacity of the insulators, with the exception of
the busbar connections in case B.
Applies to bolts screwed into components made from materials with lower property class
(e. g. aluminum) and to bolts with property class 8.8 according to ISO 898-1.
Applies to bolts with property class 8.8 or A4-70 according to ISO 898-1, however only to
bolts screwed into components made from materials with higher property class, e.g. cast
iron, steel or cast steel.
Non-standard tightening torques
Different tightening torques for electrical connections and bolted connections for parts with
flat seals or insulating parts are specified in the relevant sections and drawings.
SIMOTICS TN Series N-compact 1LA8
Operating Instructions 08/2017