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Material table
General specification
Unit
iglidur® F2
Test method
density
g/cm³
1,52
Colour
black colour
max. Moisture absorption at 23°C/50% room humidity.
% by weight
0,2
DIN 53495
max. total moisture absorption
wt.-%
0,4
Sliding friction coefficient, dynamic, against steel
µ
0,16 - 0,22
pv value, max. (dry)
MPa x m/s
0,31
Mechanical specification
flexural modulus
MPa
7.418
DIN 53457
flexural strength at 20°C
MPa
93
DIN 53452
Compressive strength
MPa
61
maximum recommended surface pressure (20°C)
MPa
47
Shore D hardness
72
DIN 53505
Physical and thermal specification
Upper long-term application temperature
°C
+120
Upper short-term application temperature
°C
+165
Lower application temperature
°C
-40
thermal conductivity
[W/m x K]
0,61
ASTM C 177
coefficient of thermal expansion (at 23°C)
[K-1 x 10-5]
5
DIN 53752
Electrical specification
Volume resistivity
Ωcm
< 109
DIN IEC 93
surface resistance
Ω
< 109
DIN 53482
Table 01: Material data
The avoidance of electrostatic charging is an important requirement in many areas of application. At the same time, the other technical application parameters such as wear resistance, media and temperature resistance, usability in humid environments, etc. must not be neglected. iglidur® F2 with its broad property profile represents a new universal bearing for numerous "ESD-compatible" applications.
Mechanical specification
The compressive strength of iglidur® F2 plain bearings decreases with increasing temperatures. diagram 02 illustrates this correlation. At the long-term permissible application temperature of +120 °C, the permissible surface pressure is still 20 MPa. The maximum recommended surface pressure represents a mechanical material parameter. Conclusions on the tribology cannot be drawn from this.
Diagram 03 shows the elastic deformation of iglidur® F2 under radial load. Under the maximum recommended surface pressure of 47 MPa, the deformation is less than 2.6 %.Plastic deformation can be ignored up to this compressive load. However, it is also dependent on the duration of the impact.
friction and wear
coefficient of friction and wear resistance change with the application parameters (diagram. 04 and 05).
iglidur® F2
Dry
Grease
oil
water
coefficient of friction µ
0,16 - 0,22
0,1
0,05
0,03
Table 04: coefficient of friction for iglidur® F2 against steel (Ra = 1 μm, 50 HRC)
Shaft materials
diagram. 06 shows the results of the tests of various shaft materials with plain bearings made of iglidur® F2. In the lower load range, free-cutting steel and hard-anodised aluminium shafts, but also HR carbon steel and hard-chrome-plated steel shafts prove to be the most favourable mating partners in terms of wear in rotating applications with iglidur® F2 plain bearings. diagram. 07 shows significantly lower wear in rotation compared to swivel movements over the entire load spectrum with otherwise comparable curves.
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