Grease selection criteria
The following greases are permissible for standard applications without any special
requirements:
● High quality ISO‑L‑X BDEA3 greases according to ISO 6743-9
● K3N‑20 greases according to DIN 51825 with lithium soap as thickener and an upper
service temperature of at least +140 °C / +284 °F.
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 9-4
Criteria for selecting roller bearing greases
Criteria
Standard
Property, characteristic value
Unit
Type of base oil
-
Mineral oil
-
Thickener
-
Lithium
-
Consistency according to NLGI class DIN 51818
● 3 for vertical and horizontal types of construction
● 2 alternatively for horizontal type of construction
with reduced lubrication interval
-
Worked penetration
DIN ISO 2137
220–295
0.1 mm
Operating temperature range
-
At least -20 °C ... +140 °C
°C
Dropping point
DIN ISO 2176
At least +200 °C
°C
Basic oil viscosity
DIN 51562-1
● Approx. 100 mm²/s at 40° C
● Approx. 10 mm²/s at 100 °C
mm²/s
Additive
-
● Antioxidation (AO), Anti-Wear (AW)
● No solid lubricants
● Alternatively: Extreme-Pressure (EP) only after
consultation with grease and bearing
manufacturers
-
FE9 test: A/1500/6000
DIN 51821-1/-2
F10 ≥ 50 h at +140 °C
F50 ≥ 100 h at +140 °C
h
Behavior with respect to water
DIN 51807
0 or 1 at a test temperature of +90 °C
-
Corrosive effect on copper
DIN 51811
0 or 1 at a test temperature of +140 °C
Corr.°
Resistance to corrosion (EMCOR)
DIN 51802 /
ISO 11007
0 - 0 (0 - 1, permissible for special greases)
Corr.°
Solid matter content, particle sizes
> 25 μm
DIN 51813
< 10 mg/kg
mg/kg
Suitability of bearings
Speed characteristic value nxdm
-
Suitable for the built-in motor bearings, seals and
these speeds
-
mm/min
Maintenance
9.2 Inspection and maintenance
SIMOTICS M-1PH8 1PH818., 1PH822., 1PH828.
Operating Instructions 10/2017
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Summary of Contents for SIMOTICS M-1PH818
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