Assessing The Roller Bearings; Regreasing Intervals And Types Of Grease For Operating Roller Bearings; Table 9-1 Criteria For Selecting Roller Bearing Greases - Siemens SIMOTICS HV M Operating Instructions Manual

9.1.6

Assessing the roller bearings

To assess the roller bearings, it is generally not necessary to dismantle the machines. The
motor only has to be dismantled if the bearings are to be replaced.
The state of a roller bearing can be assessed by analyzing the bearing vibration. The measured
values provide an indication and can be assessed by specialists. Contact the Service Center.
9.1.7

Regreasing intervals and types of grease for operating roller bearings

The specified grease data applies to the data specified on the rating plate and for high-quality
grease in accordance with the specifications in these operating instructions. Because these
greases exceed significantly the requirements according to DIN 51825 and ISO 6743‑9, they
permit the specified relubrication intervals.
Initial lubrication
The grease specified on the lubricant plate is selected according to the operating conditions
known at the time of ordering and should be used for initial lubrication.
Grease selection criteria
High quality ISO‑L‑X BDEA3 lubricating grease according to ISO 6743-9 and K3K‑20
lubricating grease according to DIN 51825 with lithium soap as a thickener and an upper
service temperature of at least +130° C / +266° F are permissible for standard applications
without special requirements.
When selecting the lubricating grease, ensure that the technical data of the grease is suitable
for the application.
The lubricating grease must satisfy the criteria listed in the table below and must match the
operating conditions. If different special lubricating greases are stated on the lubricant plate,
then different criteria apply.
Table 9-1 Criteria for selecting roller bearing greases
Criteria
Type of base oil
Thickener
Consistency in accordance with
NLGI class
Operating temperature range
Dropping point
Basic oil viscosity
SIMOTICS HV M 1RN76308PR900CG0-Z
Operating Instructions 07/2018
Standard Property, characteristic value
- Mineral oil
- Lithium
DIN 51818
● "3" for vertical and horizontal types of
construction
● "2" alternatively for horizontal type of
construction with reduced lubrication interval
- At least -20° C ... +130° C
DIN ISO 2176 At least +180° C
DIN 51562-1
● Approx. 100 mm²/s at 40 °C
● Approx. 10 mm²/s at 100 °C
Maintenance
9.1 Inspection and maintenance
Unit
-
-
-
°C
°C
mm²/s
91