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4. Take the necessary measures to ensure compliance with the applicable degree of
protection.
5. Do not forget the foam rubber cover in the cable entry. Completely seal the holes, and
ensure that cables do not come into contact with sharp edges.
9.3.4
Rolling bearings
Refer to the rating plate or the catalog for the designations of the bearings being used.
Bearing lifetime
Prolonged storage periods reduce the useful lifetime of the bearing grease. For permanently
lubricated bearings, this reduces the bearing service life.
We recommend that the grease is replaced after a storage time of 12 months. Replace
greased bearings also in the case of closed bearings (suffix 2Z or 2 RS). After 4 years in
storage, generally replace all rolling bearings and grease.
Replacing bearings
Recommended interval after which bearings are to be replaced under normal operating
conditions:
Table 9- 4
● Do not reuse bearings that have been removed.
● Remove the dirty spent grease from the bearing shield.
● Replace the existing grease with new grease.
● Replace the shaft seals when the bearings are replaced.
● Slightly grease the contact surfaces of the sealing lips.
Note
Special operating conditions
The operating hours are reduced, e.g.
• When machines are vertically mounted.
• High vibration and surge loads
• Frequent reversing operation
• Higher ambient temperatures.
• High speeds etc.
1MB..1/2/3/4 - shaft heights 63 ... 355
Operating Instructions, 06/2020, A5E44455710A
Bearing replacement intervals
Ambient temperature
40 °C
40 °C
Principle of operation
Horizontal coupling operation
With axial and radial forces
Maintenance
9.3 Corrective maintenance
Bearing replacement intervals
40 000 h
20 000 h
123
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