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iglidur庐 C500 - material data
The most important specifications at a glance
iglidur C500 is a member of the family of extremely media and temperature-resistant iglidur materials X, X6 and A500. Improved wear resistance and greater design freedom - e.g. as a guide ring - characterises this material.
| Descriptive technical specifications | ||
|---|---|---|
| Wear resistance at +23掳C | - 馃煣 馃煣 馃煣 馃煣 猬滐笍 + | |
| Wear resistance at +90掳C | - 馃煣 馃煣 馃煣 馃煣 猬滐笍 + | |
| Wear resistance at +150掳C | - 馃煣 馃煣 馃煣 馃煣 馃煣 + | |
| Slide property | - 馃煣 馃煣 馃煣 馃煣 馃煣 + | Coefficient of friction, dynamic, against steel: 碌 0.07 - 0.19 |
| Wear resistance under water | - 馃煣 馃煣 馃煣 馃煣 猬滐笍 + | |
| Media resistance | - 馃煣 馃煣 馃煣 馃煣 馃煣 + | |
| Resistant to edge pressures | - 馃煣 馃煣 馃煣 猬滐笍 猬滐笍 + | |
| Resistant to shock and impact loads | - 馃煣 馃煣 馃煣 猬滐笍 猬滐笍 + | |
| Dirt resistance | - 馃煣 馃煣 馃煣 猬滐笍 猬滐笍 + |
Temperatures
iglidur C500 is one of the most temperature-resistant iglidur materials. As with all thermoplastics, the compressive strength of iglidur C500 decreases with increasing temperatures. The temperatures prevailing in the bearing system also have an influence on the bearing wear. The wear increases with rising temperatures. Additional protection is required at temperatures higher than +130掳C.
Temperatures, thermal expansion coefficient
| min. application temperature | Upper application temperature, long-term | Upper application temperature, short-term | In addition secure axially from |
|---|---|---|---|
| -100掳C | +250掳C | + 300掳C | +130掳C |
Permissible surface speeds
The maximum permissible surface speed depends on the frictional heat generated at the bearing point. The temperature should only rise to a value that still ensures a sensible spherical insert bearing in terms of wear and dimensional accuracy. The maximum values given in the table only apply to the lowest pressure loads and are often not achieved in practice.
Surface speeds of various iglidur materials
| Maximum surface speeds [m/s] | Rotating | Oscillating | linear |
|---|---|---|---|
| Long-term | 0.9 | 0.7 | 2.4 |
| Short-term | 1.1 | 1.0 | 2.8 |
Permissible pv values
Diagram 01: Permitted pv values for iglidur C500 plain bearings with 1mm wall thickness in dry operation against a steel shaft, at +20掳C, installed in a steel housing
X = surface speed [m/s]
Y = pressure [MPa]
pv value, max. (dry)
MPa 路 m/s
0.70
Mechanical specifications
The maximum recommended surface pressure is a mechanical material parameter. Conclusions about the tribology cannot be drawn from this. The compressive strength of iglidur C500 plain bearings decreases with increasing temperatures. Diagram 02 illustrates this relationship. Diagram 03 shows how iglidur C500 deforms elastically under radial load. Under the maximum recommended surface pressure of 110MPa, the deformation is about 4.5%.
Friction and wear
The values for friction and wear are even more favourable for iglidur C500 than for the other high-temperature materials iglidur X and A500. The coefficient of friction increases moderately with the surface speed. With the load, the coefficient of friction initially drops significantly to below 0.1 up to 20MPa; with higher loads only slightly. However, friction and wear are also highly dependent on the mating partner. Shafts that are too smooth increase both the coefficient of friction and the wear of the bearing. A ground surface with an average surface finish of Ra = 0.6 to 0.8渭m is best suited.
Coefficient of friction against steel (Ra = 1渭m, 50HRC):
| iglidur聽C500 | dry | Greases | Oil | Water |
|---|---|---|---|---|
| Coefficient of friction 渭 | 0.07-0.19 | 0.09 | 0.04 | 0.04 |
Shaft materials
Diagram 06 shows test results with different shaft materials that were carried out with plain bearings made from iglidur C500. Using the example of a rotational movement with radial loads of 1MPa and a speed of 0.3m/s, it becomes apparent that iglidur C500 is very consistent in wear across a wide range of shaft types. This wear rate spikes in combination with free cutting steel, and, notably so, reduces in combination with HC aluminium. The wear in rotation is higher, especially with increasing radial loads, than with pivoting movements (diagram 07).
Chemical resistance
iglidur C500 plain bearings have very good resistance to chemicals.
The vast majority of organic and inorganic acids do not affect iglidur C500, nor do alkalis or lubricants.
All data at room temperature [+20 掳C], 聽聽聽聽 + resistant 聽聽聽聽 0 conditionally resistant 聽聽聽聽 - non-resistant
| Chemicals | Resistance |
|---|---|
| Alcohols | + |
| Greases, oils without additives | + |
| Hydrocarbons | + |
| Fuels | + |
| Strong alkalines | + |
| Strong acids | + |
| Diluted alkalines | + |
| Diluted acids | + |
Moisture absorption
Installation tolerances
iglidur C500 plain bearings are standard bearings for shafts with h-tolerance (recommended minimum h9). The bearings are designed for press-fit into a housing machined to a H7 tolerance. After being assembled into a nominal size housing, the inner diameter automatically adjusts to the F10 tolerances.
Important tolerances according to ISO 3547-1 after press-fit:
| Diameter d1 [mm] | Housing H7 [mm] | iglidur C500 plain bearing F10 [mm] | Shaft h9 [mm] |
|---|---|---|---|
| up to 3 | +0.000 +0.010 | +0.006 +0.046 | -0.025 +0.000 |
| > 3 up to 6 | +0.000 +0.012 | +0.010 +0.058 | -0.030 +0.000 |
| > 6 up to 10 | +0.000 +0.015 | +0.013 +0.071 | -0.036 +0.000 |
| > 10 up to 18 | +0.000 +0.018 | +0.016 +0.086 | -0.043 +0.000 |
| > 18 up to 30 | +0.000 +0.021 | +0.020 +0.104 | -0.052 +0.000 |
| > 30 up to 50 | +0.000 +0.025 | +0.025 +0.125 | -0.062 +0.000 |
| >50 to 80 | +0.000 +0.030 | +0.030 +0.150 | -0.074 +0.000 |
| >80 to 120 | +0.000 +0.035 | +0.036 +0.176 | -0.087 +0.000 |
| > 120 up to 180 | +0.000 +0.040 | +0.043 +0.203 | +0.000 +0.100 |
Typical application areas
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