VLT
®
FCM Series
Installation
Maximum permissible external axial and radial loads in N
1
- reinforced ball bearings
Horizontal shaft Vertical shaft
Load towards Load away Shaft up Shaft down
Frame motor from motor load load load load
size Poles Up Down Up Down Max. radial
2
80 2 1375 2205 2405 1225 1470 2160 3190
4 1865 2745 2845 1715 1960 2600 3925
90 2 2060 3190 2990 1470 1865 2600 4120
4 2700 3825 3580 2010 2355 3140 4515
100 2 4265 4265 4660 4660 4070 4070 6035
4 5050 5050 5590 5590 4805 4805 6965
112 2 4265 4265 4660 4660 4070 4070 6035
4 5050 5050 5590 5590 4805 4805 6965
132S 2 5295 7015 7850 4760 6080 6525 8925
4 6325 8045 9125 5690 7360 7405 9860
132M 4 6280 8045 9270 5545 7505 7310 10200
1
All figures are based on Lna bearing life of 20,000 hours.
Lna = adjusted L10 life rating taking account of:-Reliability -Material improvements -Lubrication conditions
2
Max. permissible radial load at end of shaft (horizontal mounting).
■ Bolt torques
Endshields and lid should be secured with the bolt
sizes and torque’s detailed in the table below.
Endshield fixing bolt torques
FCM Type Frame size Bolt diameter Torque
Nm.
305-307 80 M5 5
311-315 90 M5 5
322-330 100 M6 (taptite) 8-10
340 112 M6 (taptite) 8-10
355-375 132 M8 (taptite) 29
LID screws torque: 2.2 - 2.4 Nm
■ Maintenance
R
outine cleaning of the FC motor
Remove the fan cover and ensure that all air inlet holes
are completely free. Clean any dirt and obstructions
from behind the fan and along the ribs of the frame,
and between the motor and inverter part.
P
eriodic maintenance of motor part.
a. Remove the inverter part, the fan cover and
the fan which is keyed to the shaft extension.
Loosen and remove bearing cover screws and
endshield bolts/studs.The endshields should
then be eased off their spigots.
b. The rotor can now be carefully withdrawn from
the stator, taking care not to damage the stator
bore and both stator and rotor windings.
c. Having dismantled the motor, maintenance can be
carried out to remove all dirt. For this purpose,
the use of an air line supplying dry compressed
air under comparatively low pressure is best, as
a high velocity air-stream can force dirt into the
spaces between the windings and insulation, etc.
Grease-removing solvents can cause damage
to impregnating varnish or insulation
d. The FC-motor should be re-assembled in the
reverse order from dismantling, remember
ing
to ease endshields onto bearings and spigots.
DO NOT USE FORCE.
e. Before starting, check that the rotor rev
olves freely.
Ensure that the electrical connections are correct.
f. Refit any pulley, coupling, sprocket etc. which
has been removed, being particular
ly careful to
ensure correct alignment with the driven part,
as misalignment will lead to ultimate bearing
trouble and shaft breakage.
g. When replacing screws and bolts, care should be
taken to use only those with the requisite quality and
tensile strength recommen
ded by the manufacturer.
These must also be of identical thread form and
screw/bolt length (see the table above).
MG.03.H3.02 - VLT is a registered Danfoss trademark
21
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