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Siemens 1LA8 Operating Instructions Manual Page 109

Simotics tn series n-compact induction motor.
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● Neutral ambient air
● High-quality roller bearing greases
In the case of unfavorable operating conditions, the regreasing intervals must be reduced after
consultation with the manufacturer.
Pay attention to the instructions on the lubricant plate.
1. The shaft must rotate during regreasing, so that the new grease can be distributed
2. Clean the grease nipples before regreasing and then gradually press in an appropriate type
3. The used grease collects outside each bearing in a spent grease chamber.
Lubricating roller bearings prior to commissioning
When properly stored prior to commissioning for a longer period of time, normally the grease
in the bearings does not deteriorate within two years. Please note the information regarding
long-term storage.
When commissioning, the bearings must be relubricated with twice the amount of lubricating
grease. When doing this, the shaft must rotate so that the grease is replaced in the bearings.
Overheating of the rolling bearings
If the roller bearings are not regularly regreased, local overheating may be possible, and, as
a consequence, an explosion in an explosive atmosphere. This can result in death, serious
injury or material damage.
● Regrease the roller bearings regularly according to the lubrication plate.
● Implement bearing temperature monitoring if not yet in existence.
SIMOTICS TN Series N-compact 1LA8
Operating Instructions 05/2014
throughout the bearing. For motors operated with a converter, regreasing should be carried
out at low to medium speed where possible (n
even distribution of grease.
Rotating components
The shaft must rotate to allow the grease to be distributed. This can result in death, serious
injury or material damage.
When regreasing, pay attention to all rotating components.
and amount of grease, as described on the lubricant plate and by the specifications in these
operating instructions.
The roller bearing temperature rises sharply at first, then drops to the normal value again
after the excess grease has been displaced out of the bearing.
9.1 Inspection and maintenance
= 250 rpm , n
= 3600 rpm) to ensure an


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