SEW-Eurodrive DR 315 Series, Operating Instructions Manual

Page: 121 / 268

7
Inspection/maintenance
Bearing lubrication
Operating Instructions – AC Motors
121
7.2 Bearing lubrication
7.2.1 Bearing lubrication for DR..71 – 280, DRN63 – 280, DR2..56 – 80 motors
In standard design, the bearings are lubricated for life.
7.2.2 Bearing lubrication for DR..250 – 315, DRN225 – 315 motors with relubrication device /NS
Motors of nominal sizes 225, 250, 280, and 315 can be equipped with a relubrication
device. The following figure shows the positions of the lubrication devices.
375353099
[1] Relubrication device in type A according to DIN 71412
Under normal operating conditions and at an ambient temperature between -20 °C to
+40 °C, SEW‑EURODRIVE uses Mobil Polyrex EM (K2P-20 DIN 51825), a polyurea-
based mineral high-performance, high-temperature grease for initial lubrication.
For motors in the low temperature range up to -40 °C SEW-EURODRIVE uses SKF
GXN or LGHP2, which are also a polyurea-based mineral greases.
Relubrication
The grease can be purchased from SEW‑EURODRIVE in 400 g cartridges. For the re-
levant order information, refer to chapter "Order information for lubricants, anti-corro-
sion agents and sealants" (→
2
213).
INFORMATION
Only mix lubricants of the same thickness type, the same base oil and the same con-
sistency (NLGI class)!
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 to 8 re-
lubrication cycles during an inspection. Each time you relubricate, ensure that the
bearing is two-thirds full.
After relubricating the motors, you should start up slowly, if possible, so that the
grease is distributed evenly.
25851535/EN – 02/2019