iglidur® 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°C	- 🟧 🟧 🟧 🟧 ⬜️ +	More information on wear resistance
Wear resistance at +90°C	- 🟧 🟧 🟧 🟧 ⬜️ +
Wear resistance at +150°C	- 🟧 🟧 🟧 🟧 🟧 +
Slide property	- 🟧 🟧 🟧 🟧 🟧 +	Coefficient of friction, dynamic, against steel: µ 0.07 - 0.19
Wear resistance under water	- 🟧 🟧 🟧 🟧 ⬜️ +
Media resistance	- 🟧 🟧 🟧 🟧 🟧 +	More information on media resistance
Resistant to edge pressures	- 🟧 🟧 🟧 ⬜️ ⬜️ +
Resistant to shock and impact loads	- 🟧 🟧 🟧 ⬜️ ⬜️ +
Dirt resistance	- 🟧 🟧 🟧 ⬜️ ⬜️ +

When do I use this material?

When an extremely media-resistant plain bearing with high flexibility is required
When a very wear-resistant and media-resistant plain bearing is required

When do I use a different material?

When an FDA-compliant high-temperature plain bearing is required -> iglidur A500
If you are looking for a media-resistant high-temperature plain bearing with a wide range of dimensions -> iglidur X

Download data sheet

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°C.

Temperatures, thermal expansion coefficient

min. application temperature	Upper application temperature, long-term	Upper application temperature, short-term	In addition secure axially from
-100°C	+250°C	+ 300°C	+130°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

pv value, max. (dry)

MPa · m/s

0.70

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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 0.8μm is best suited.

Coefficient of friction against steel (Ra = 1μm, 50HRC):

iglidur C500	dry	Greases	Oil	Water
Coefficient of friction μ	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).

Further information on shaft materials

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 °C], + resistant 0 conditionally resistant - non-resistant

Chemicals	Resistance
Alcohols	+
Greases, oils without additives	+
Hydrocarbons	+
Fuels	+
Strong alkalines	+
Strong acids	+
Diluted alkalines	+
Diluted acids	+

Moisture absorption

The moisture absorption of iglidur C500 plain bearings is less than 0.3% in a normal climate. The saturation limit in water is also less than 0.5%.

Maximum moisture absorption

at +23°C/50% room humidity.

0.3% weight

Maximum total moisture absorption

0.5% weight

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

Thermal conductivity

[W/m · K] 0.24

ASTM C 177

Coefficient of thermal expansion

(at +23°C) [K-1 · 10-5] 9

DIN 53752

Compressive strength

110MPa

Vacuum

In a vacuum, any moisture present degasses. Use in a vacuum is generally possible.

Radioactive radiation

iglidur C500 withstands both neutron and gamma particle radiation without any noticeable loss of its excellent mechanical specifications. Plain bearings made of iglidur C500 are resistant to radiation up to a radiation intensity of 3 · 102Gy.