35
Motor
Manual
are equipped as standard with lifetime greased bearings in
frames size up to 225. Motor types MS and Y2E are equipped
as standard with lifetime greased bearings in frame sizes
up to 160. Typical operating hours for lifetime lubricated
bearings are shown in Table 14, Lubricated bearing lifetime.
It is important that the shaft seals are intact.
Frame size Poles Typical lifetime
50–160 2–8 40,000 h
180 2 35,000 h
200 2 27,000 h
225 2 23,000 h
180–225 4–8 40,000 h
Table 17 Lubricated bearing lifetime
Motors with re-greaseable bearings are equipped with a
greasing data plate. If the data plate is missing, or the infor-
mation on it unreadable, please use the re-greasing intervals
shown in Table 15, Re-greasing intervals and amounts.
Values on Table 15 are calculated based on worst case sce-
narios so it fits on a wider application range, whereas values
on the nameplates are calculated for the respective motor
specification. As a result, the data on the motor greasing
plate can deviate from the values on Table 15. Different mo-
tor items, with the same bearing size and type may also have
different re-greasing periods for the same reason. For miss-
ing greasing data plate or any doubt please contact Hoyer.
Frame
size
Grease
(g)
2-pole
(h)
4-pole
(h)
6-pole
(h)
8-pole
(h)
160 20 4200 7000 8500 8500
180 20 4200 7000 8500 8500
200 25 3100 6500 8500 8500
225 25 3100 6500 8500 8500
250 35 2000 6000 7000 7000
280 35 2000 6000 7000 7000
315 50 1500 5500 6500 6500
355 60 1000 4000 5000 6000
400 80 800 3000 4000 6000
Table 18 Re-greasing intervals and amounts
A suggestion for re-greasing procedure can be as follows:
1. Remove the fan cover (If grease inlet and outlet is not
accessible through the fan cover in NDE).
2. Open the dust protection cap of the grease nipple inlet
and the grease outlet both for DE and NDE.
3. Check if the grease nipple is clean and free of dirt.
4. Remount the fan cover (If grease inlet and outlet is not
accessible through the fan cover in NDE).
5. Run the motor till it has reached its hot condition nor-
mally 1-2 hours (skip this point for the first startup).
6. Use manual or automatic grease gun and add the speci-
fied grease type and amount while the motor is run-
ning (N.B. the fan cover must always be fixed on the
motor when its running).
7. Take of the grease gun and let the motor run in order to
get the old grease out approx. 1-2 hours.
8. Stop the motor and wait for complete standstill.
9. Dismount the fan cover If grease inlet and outlet is not
accessible through the fan cover in NDE).
10. Close the dust protection cap of the grease nipple inlet
and the grease outlet.
11. Clean up the old grease.
12. Remount the fan cover (If grease inlet and outlet is not
accessible through the fan cover in NDE).
Note: Due to danger it is forbidden to get in contact with
rotating or live parts under the maintanance. At the first
startup for the motor the bearings must be greased before
startup, else the bearings will be damaged.
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