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
Routine
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.
Periodic 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b. The rotor can now be carefully withdrawn from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, remembering
to ease endshields onto bearings and spigots.
DO NOT USE FORCE.
e. Before starting, check that the rotor revolves freely.
Ensure that the electrical connections are correct.
f. Refit any pulley, coupling, sprocket etc. which
has been removed, being particularly 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 recommended 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
