Tightening Torques For Screw And Bolt Connections - Siemens SIMOTICS M-1PH8 Operating Instructions & Installation Instructions

Assembling

5.7 Tightening torques for screw and bolt connections

● Use foot screws with a minimum property class of 8.8.
● Pin the mounting feet to the customer foundation for motors with types of construction B6,
Flange mounting
The flange is only used to transfer the torque. Due to the empty weight or as a result of
vibrations that arise if the flange is too soft, the motor can be damaged if it is only fastened via
the flange.
1. Fasten the flange-mounted motors via a stable motor suspension and support them via the
2. During commissioning, ensure that the permitted vibration values are maintained in
5.7 Tightening torques for screw and bolt connections
Bolt locking devices
● Refit nuts or bolts that are mounted together with locking, resilient, and/or force-distributing
● When screwing together threads secured with a liquid adhesive, use a suitable medium
● Always use suitable securing devices or removable adhesives (e.g., Loctite 243) when
Tightening torques
The bolted connections with metal contact surfaces, such as end shields, bearing cartridge
parts, terminal box parts bolted onto the stator frame, should be tightened to the following
torques, depending on the thread size:
52
B7, B8, V5 and V6.
Type
1PH818.
1PH822.
1PH828.
end shield feet (foot flange type of construction).
accordance with ISO 10816‑3.
If the motor is to be only flange mounted, then the maximum speed n
foundations according to the following table:
Type
1PH818.
1PH822.
1PH828.
Maximum speed for a rigid foundation and flange mounting
elements with identical, fully-functional elements when re-assembling. Always renew keyed
elements.
such as Loctite 243.
installing fixing bolts with a clamping length of less than 25 mm. The clamping length is
taken as the distance between the head of the bolt and the point at which the bolt is screwed
in.
Foot screw size
M12
M16
M20
max
Maximum speed n
max
3000 /
1
min
2500 /
1
min
2000 /
1
min
Operating Instructions 05/2012 A5E03986435A AA
is reduced for rigid
SIMOTICS M-1PH8