Danfoss FCM305 56 Instruction Manual page 29

Maximum permissible external axial and radial loads in N (1N = 0.225 lbf) angular contact bearings
Horizontal shaft
Load towards Load away
Frame motor
size Poles
80 2 1375
4 1865
90 2 2060
4 2700
100 2 4265
4 5050
112 2 4265
4 5050
132S 2 5295
4 6325
132M 4 6280
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).
Foot Mounting Bolt Torques
Face/Flange, feet and lid should be secured with the
bolt sizes and torque's detailed in the table below.
Foot mounting bolt torques
FCM Type Frame size Bolt diameter Torque
305-307 80
311-315 90
322-330 100
340 112
355-375 132
LID screws torque: 2.2 - 2.4 Nm, Plastic plug (cable entrance) torque: 2.0 Nm
1 Nm = 1.196 lb-ft
Maintenance
Routine cleaning of the FCM 300 Routine cleaning of the FCM 300 Routine cleaning of the FCM 300
Routine cleaning of the FCM 300 Routine cleaning of the FCM 300
Remove the fan cover and ensure that all air inlet
holes are completely clear. Clean any dirt and
obstructions from behind the fan and along the ribs of
the frame, and between the motor and inverter.
Periodic maintenance of motor Periodic maintenance of motor Periodic maintenance of motor Periodic maintenance of motor Periodic maintenance of motor. . . . .
a) Remove the inverter, 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(b) The rotor can now be carefully withdrawn from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
MG.03.B6.2G - VLT is a registered Danfoss trademark
Vertical shaft
from motor
2205
2745
3190
3825
4265
5050
4265
5050
7015
8045
8045
Nm.
M8 (taptite) 24-25
M8 (taptite) 24-25
M8 (taptite) 32-35
M8 (taptite) 32-35
M8 (taptite) 32-35
FCM 300 Series
Shaft up
load load
Up Down
2405 1225 1470
2845 1715 1960
2990 1470 1865
3580 2010 2355
4660 4660 4070
5590 5590 4805
4660 4660 4070
5590 5590 4805
7850 4760 6080
9125 5690 7360
9270 5545 7505
Face/Flange bolt torques
FCM Type Frame size Bolt diameter Torque
305-307
311-315
322-330
340
355-375
windings and insulation, etc. Grease-removing
solvents can cause damage to impregnating
varnish or insulation
(d) The FCM 300 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 spins
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 grade
recommended by
the manufacturer. These must also be of
identical thread form and screw/bolt length
(see the table above).
Shaft down
load load
Up Down Max. radial
2160 3190
2600 3925
2600 4120
3140 4515
4070 6035
4805 6965
4070 6035
4805 6965
6525 8925
7405 9860
7310 10200
Nm
80 M5
90 M5
100 M6 (taptite)
112 M6 (taptite)
132 M6 (taptite)
2
5
5
8-10
8-10
8-10
6-3