ABB
ABB/ BU Machines / HV Induction motors IEC catalogue / Engineered motors EN 12-2007
63
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Bearing rating life
Most motors with standard bearings have a rated life
time L
10h
in excess of 100000 h. Rated life time for frame
500, 2-pole, may be less than 100000h. The life times
are calculated in accordance with ISO R 281-1.
The basic rated life L
10h
is the number of hours at rated
bearing load and speed that 90% of a group of identical
bearings will complete or exceed before the first
evidence of failure.
Lubrication intervals
The motors are equipped with greasing nipple(s) in
both ends for lubricating the bearings. The greasing
nipples are located on top of the motor. The amount of
grease and the interval of greasing are stamped on the
relubrication plate. The values are also shown in the
table below.
Bearing
type
Amount of
grease [g]
Lubrication intervals in running hours at different speeds [rpm]
3600
3000
1800 - 1500
1200 - 1000
900 - 750
600 - 500
6317
35
800
2200
8800
8800
8800
8800
6319
45
400
1600
6600
8800
8800
8800
6322
60
6600
8800
8800
8800
6324
70
4400
8800
8800
8800
6326
80
4400
8800
8800
8800
6034
55
1600
3300
6600
8800
NU1034
55
1600
3300
4400
8800
NU322
60
3300
4400
4400
8800
7317
35
1100
4400
4400
4400
6600
7319
45
800
3300
4400
4400
6600
7322
60
3300
4400
4400
6600
7324
70
2200
4400
4400
6600
NB: Ball bearings on vertical motors should be lubricated twice as frequently as horizontal motors. The motor type is indicated by the first letter
of the bearing type (6).
Table below: Relubrication intervals and grease amount.