Operating Instructions – Explosion-Proof AC Motors – DRS/DRE/DRP 315
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7
Bearing lubrication
Inspection/Maintenance
7.2
Bearing lubrication
7.2.1
Bearing lubrication of the DR.315
Series 315 motors may be equipped with a lubrication device. The following figure
shows the positions of the lubrication devices.
Under normal operating conditions and at an ambient temperature between -20 °C C to
40 °C, SEW-EURODRIVE uses ESSO Polyrex EM (K2P-20 DIN51825), a polyurea-
based mineral high-performance, high temperature grease for the initial lubrication.
For motors in the low temperature range up to -40 °C SEW uses SKF GXN, which is also
a polyurea-based mineral grease.
Relubrication
You can purchase the lubricants in 400 g cartridges from SEW-EURODRIVE. For order
information, refer to the section, "Lubricant tables for roller bearings of SEW motors" .
Grease the motor bearings in accordance with the information on the lubricant plate. The
used grease collects inside the motor and should be removed every 6-8 relubrication cy-
cles during an inspection. Each time you re-lubricate, ensure that the bearing is two-
thirds full.
After relubricating the motors, you should startup slowly, if possible, so that the grease
is distributed evenly.
375353099
[1] Lubrication device in type A in accordance with DIN 71412
NOTE
Only mix lubricants of the same thickness type, the same base oil and the same con-
sistency (NLGI class).
