Page 57 - IGUS Bearing

iglidur | Technical data
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Wear resistance

The wear of components depends on many different Wear and temperature
factors, therefore it is difficult to make general statements Within wide temperature ranges, the wear resistance of the
about the wear behaviour. In many experiments and tests, iglidur plain bearings shows little change. In the maximum
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the measurement of the wear is a primary factor. In testing, temperature range, however, the temperature increases
it has become clear what variances are possible between and the wear of the plain bearing increases. One particular
different material pairings. For given loads and surface exception is represented by iglidur X. The wear resistance
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speeds, the wear resistance can easily vary by a factor of of iglidur X greatly increases as temperature increases and
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10 between material pairings that run well together. reaches the optimum wear resistance at a temperature of
+160°C. Then resistance decreases again, gradually.
u Shaft materials, page 56
Wear during abrasive dirt accumulation
Wear under load Special wear problems frequently occur if abrasive dirt
Different loads greatly influence the bearing wear. Among particles get into the bearing. iglidur plain bearings can
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the iglidur plain bearings, certain materials are optimised clearly improve the operating time of machines and systems
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for low loads, while others are suitable for use with high or in these situations. The high wear resistance of the materials
extremely high loads. and the dry operation result in the highest service life. As
no oil or grease is on the bearing, dirt particles cannot
adhere or penetrate as easily into the bearing. Most debris
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simply falls away from the bearing thus limiting potential
damage. If however, a hard particle penetrates into the
10 bearing area, then an iglidur plain bearing can absorb this
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particle. The foreign body becomes embedded in the wall
Wear [µm/km] 1 of the plain bearing. Up to a certain point, operation can Picture 07: High wear resistance: plain bearing in Picture 8: Wear experiments with aluminium shafts

be maintained at optimal levels even when there is extreme
0.1
0.25 0.75 1 2 5 dirt accumulation. permanent contact with sand
However, it is not just hard particles that can damage
Load [MPa] bearings and shafts. Soft dirt particles such as for example,
iglidur G iglidur M250 iglidur X
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iglidur J iglidur W300 textile or paper fibres, are frequently the cause for increased
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Diagram 11: Wear of iglidur plain bearings under low wear. In this instance, the dry operation capability and the
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pressures, Cf53 shaft, v = 0.1m/s dust resistance of the iglidur plain bearings go into action.
In the past, this helped save costs in many applications.
100 Wear and surfaces
Shaft surfaces are important for the wear of bearing
systems. Similar to the considerations for the coefficient of
friction, a shaft can be too rough in regard to the bearing
10 wear, but it can also be too smooth. A shaft that is too
Wear [µm/km] rough acts like a file and during movement separates small

particles from the bearing surface. For shafts that are too
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5 10 20 45 smooth, however, higher wear can also occur. An extreme
Load [MPa] increase in friction results due to adhesion. The forces that
iglidur G iglidur P iglidur Z act on the mating surface can be so large that material
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iglidur J iglidur V400 iglidur Q
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iglidur W300 blow-outs occur.
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Diagram 12: Wear of iglidur plain bearings at medium It is significant to note that wear by erosion is non-linear,
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and high pressures, shaft: Cf53, v = 0.1m/s random and cannot be accurately predicted.
ASEAN 09/2023 ASEAN 09/2023 Picture 9: Erosion damage due to shafts that are too smooth

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