Bearing Replacement - Siemens 1LG0 Installation And Maintenance Manual

4.5 Bearing replacement – assembly and disassembly
As bearings near the end of their useful lifespan, the vibration and noise levels of the
motor will increase considerably.
If bearing inner daimeter or wear clearance is out of specifi cation as per table 4, the
bearing must be replaced.
Table 4
Frame Size
Bearing inner dia (mm)
Wear clearance (mm)
Note:
Worn or damaged bearings must be replaced with an equivalent bearing
matching the original specifi cations.
When replacing the bearing, dismantle the necessary parts and use a suitable bearing
extraction tool to remove the damaged or worn bearing.
Before installing the new bearing, pre-heat the bearing as per the manufacture
instruction prior to pressing it onto the rotor shaft. Shaft sealing rings (V Ring or Oil
Seal) must be replaced with new ones after bearing replacement.
Any impacts or hits (such as with a hammer etc.) is strictly forbidden as
Warning! Warning!
this will damage the bearing and result in premature failure.
Please refer to tightening torques for the end fl ange bolts.
Size
Torque (Nm)
Note:
80 ~112
20 ~ 30
0.1
M4 M5
2 3.5
Tightening Torque (Nm, Tolerance: ±10%)
132 ~ 160 180 ~ 250
35 ~ 50 55 ~ 80
0.15
M6 M8 M10
6 16 28
280 ~ 355
85 ~120
0.2 0.3
M12 M16
46 110
M20
225
15