Note
Dicult operating conditions in operation at n
max
Under dicult operating conditions, the bearing replacement intervals t
LW
are reduced by up to
50%.
Dicult operating conditions include
• large vibrations and shocks
• frequent reversing operation
Note
Reduced maximum motor speeds
The maximum speeds might be reduced on motors with integrated encoder as a result of
mechanical conditions or limitations imposed by signal conditioning capacity.
The reduced maximum speeds can be found in the table "Encoder types for motors with DRIVE-
CLiQ" in Chapter Encoder assignment as a function of maximum permissible speeds (Page 160).
Note
Permanently switching on the sealing air
For the "Premium Performance" bearing version, Siemens recommends that the sealing air be
permanently switched on during continuous operation at n
max
. Sealing air connection and
conditioning are described in Chapter "Sealing air connection (option Q12) (Page169)."
Mechanical properties
4.4Types of bearing
1PH8 SIMOTICS M main motors
90 Conguration Manual, 12/2022, A5E51895839A