34 - PVD 3661 MGV_ commisionning manual_March 2012.docx
The table below gives the average tightening torques required regarding the fixing screw diameter. These
values are valid for both motor’s feet and flange bolting.
Screw diameter
Tightening torque
Screw diameter
Tightening torque
M2 x 0.35
0.35 N.m
M9 x 1.25
31 N.m
M2.5 x 0.4
0.6 N.m
M10 x 1.5
40 N.m
M3 x 0.5
1.1 N.m
M11 x 1.5
56 N.m
M3.5 x 0.6
1.7 N.m
M12 x 1.75
70 N.m
M4 x 0.7
2.5 N.m
M14 x 2
111 N.m
M5 x 0.8
5 N.m
M16 x 2
167 N.m
M6 x1
8.5 N.m
M18 x 2.5
228 N.m
M7 x 1
14 N.m
M20 x 2.5
329 N.m
M8 x 1.25
20 N.m
M22 x 2.5
437 N.m
M24 x 3
564 N.m
Warning:
4.2.2.
After 15 days, check all tightening torques on all screws and nuts.
Once the motor is installed, it must be possible to access to the wiring, and read the manufacturer’s plate. Air
must be able to circulate freely around the motor for cooling purposes.
Preparation
Clean the shaft using a cloth soaked in white spirit or alcohol. Pay attention that the cleaning solution does not
get on to the bearings.
The motor must be in a horizontal position during cleaning or running.
Caution:
Do not step on the motor, the connector or the terminal box
Caution:
Always bear in mind that some parts of the surface of the motor can reach or
exceed 100°C
4.2.3.
The operational life of High-speed motor bearings largely depends on the care and
attention given to this operation.
Mechanical assembly
•
Carefully check the alignment of the motor shaft with the driven machine to avoid
vibrations, irregular rotations or applying too much strain on the shaft.
•
Prohibit any impact on the shaft or press fitting which could mark the bearing tracks.
•
In the event that the front bearing block is sealed by a lip seal which rubs on the
rotating section, we recommend that you lubricate the seal with grease to extend its
operational life.
