First lubrication after changing the bearings
1. For every first lubrication, fill the bearing with the amount of grease specified.
Bearing version Grease quantities for initial lubrication
6218 30 g
6220 40 g
Grease quantities per bearing for initial lubrication
2. Distribute the lubricant by running the machine systematically at different speeds. This
prevents the bearings from become hot too quickly.
– Level 1: 10 min at 0.8 · n
max
– Level 2: 10 min at n
max
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.
Regreasing intervals
The necessary relubrication intervals depend essentially on the level of dirt in the environment
and on the ON time of the motor. For this reason, they can only be defined taking into account
the respective operating conditions. Make sure that the groove in the seal is full of grease at
all times.
9.1.11 Keeping the cooling air flow clean
The cooling ducts must be free of any pollution in order that the machine is adequately cooled.
Regularly clean the grids, ducts, ribs, pipes etc. to remove dust and pollution.
Maintenance
9.1 Inspection and maintenance
SIMOTICS TN Series N-compact 1PQ8
118 Operating Instructions 11/2018
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