Siemens SIMOTICS FD 1MM1 Series, Operating And Installation Instructions

Page: 127 / 178

Regreasing rolling bearings
Regrease the rolling bearings at the latest every 12 months irrespective of the actual number
of operating hours. The regreasing intervals for rolling bearings differ from the service intervals
for the machine. The rolling bearings may be damaged if the relubrication intervals are not
complied with. Pay attention to the instructions on the lubricant plate.
1. Clean the grease nipple.
2. Rotate the shaft when regreasing, so that the new grease can be distributed throughout the
bearing.
Motors that are operated with converters: Regrease the bearings at a low to medium speed
(n
min
= 250 rpm, n
max
= 3600 rpm) to ensure an even distribution of grease.
WARNING
Risk of injury due to rotating parts
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.
3. Gradually press in an appropriate type and amount of grease, as stamped on the lubricant
plate and specified in these operating instructions - max. 50 g per 30 min.
The rolling bearing temperature rises sharply at first, then drops to the normal value again
when the excess grease is displaced out of the bearing.
The used grease collects outside each bearing in a spent grease chamber.
Greasing the rolling 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.
● 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.
● Carefully observe the information relating to long-term storage.
9.1.10 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.
Maintenance
9.1 Inspection and maintenance
SIMOTICS FD 1MM1
Operating Instructions 02/2019
127