Grease Lubricated Rolling Bearings - WEG W22 Premium E3 Manual De Instalación, Operación Y Mantenimiento

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Please contact WEG when motors are to be installed in special environments or used for special
applications.

8.2.1. Grease lubricated rolling bearings

Excess grease causes bearing overheating, resulting in bearing failure.
The lubrication intervals specified in Table 8.1, Table 8.2, Table 8.3 and Table 8.4 consider an absolute
temperature on the bearing of 70 °C (up to frame size IEC 200 / NEMA 324/6) and 85 °C (for frame size IEC 225
/ NEMA 364/5 and above) the motor running at rated speed, a motor mounted in horizontal position, greased
with Mobil Polyrex EM grease. Any variation of the parameters listed above must be evaluated.
Frame
IEC NEMA
90 143/5
100 -
112 182/4
132 213/5
160 254/6
180 284/6
200 324/6
364/5
404/5
444/5
225 445/7
250 447/9
280 L447/9
315 504/5
355 5008
5010/11
586/7
588/9
112 Manual of Electric Motors
Table 8.1 - Lubrication intervals for deep groove ball bearings.
Bearing Amount of
Poles
designation grease (g)
2
4
6205
6
8
2
4
6206
6
8
2
4
6207/
6307
6
8
2
4
6308
6
8
2
4
6309
6
8
2
4
6311
6
8
2
4
6312
6
8
2
4
6314
6
8
2
4
6316
6
8
2
4
6319
6
8
4
6 6322
8
Lubrication intervals (hours)
W21 TEFC
(Totally Enclosed Fan
Cooled)
50 Hz 60 Hz
4 20000 20000
5 20000 20000
9 20000 20000
20000 18400
11
20000 20000
18100 15700
13
20000 20000
13700 11500
18
20000 20000
11900 9800
21
20000 20000
4500 3600
11600 9700
27
16400 14200
19700 17300
*Upon
3500
request
10400 8500
34
14900 12800
18700 15900
*Upon
2400
request
9000 7000
45
13000 11000
17400 14000
7200 5100
60 10800 9200
15100 11800
W22 TEFC
(Totally Enclosed Fan
Cooled)
50 Hz 60 Hz
25000 25000
25000 25000
25000 25000
25000 23200
25000 25000
22000 20000
25000 25000
17000 14000
25000 25000
15000 12000
25000 25000
5000 4000
14000 12000
20000 17000
24000 20000
*Upon
4000
request
13000 10000
18000 16000
20000 20000
*Upon
3000
request
11000 8000
16000 13000
20000 17000
9000 6000
13000 11000
19000 14000