Sealing The Rolling-Contact Bearings ("Increased Degree Of Protection" Option) - Siemens 1LA8 Operating Instructions Manual

Maintenance
9.1 Inspection and maintenance
● 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.
Regreasing
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.
9.1.9

Sealing the rolling-contact bearings ("Increased degree of protection" option)

Relubricating the grease tank
In order to achieve optimum sealing of the rolling contact bearings and to reliably seal the
labyrinth joints with grease, the chamber must be relubricated at regular intervals. The
procedure is the same as that for lubricating grease. The sealing effect during operation is
optimum as long as a small amount of relatively clean grease is forced out.
104
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.
WARNING
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.
= 250 rpm , n = 3600 rpm) to ensure an
min max
SIMOTICS TN Series N-compact 1LA8
Operating Instructions 05/2016