|General specifications||Unit||iglidur® P230||Testing method|
|Max. moisture absorption at 23 °C/50% r.h.||% weight||0,1||DIN 53495|
|Max. total moisture absorption||% weight||0,5|
|Coefficient of friction, dynamic, against steel||µ||0,06 - 0,21|
|pv value, max. (dry)||MPa · m/s||0,30|
|Flexural modulus||MPa||6.532||DIN 53457|
|Flexural strength at +20°C||MPa||173|
|Max. recommended surface pressure (+20°C)||MPa||60|
|Shore-D hardness||80||DIN 53505|
Physical and thermal properties
|Max. application temperature long-term||°C||+110|
|Max. application temperature short-term||°C||+180|
|Min. application temperature||°C||-30|
|Thermal conductivity||[W/m · K]||0,34||ASTM C 177|
|Coefficient of thermal expansion (at +23 °C)||[K-1 · 10-5]||5||DIN 53752|
|Specific volume resistance||Ωcm||> 1012||DIN IEC 93|
|Surface resistance||Ω||> 1012||DIN 53482|
iglidur® P230 is a material with low moisture absorption and well-balanced thermal properties for use in cost-sensitive series-production applications. Good wear resistance at low pv values and low to medium speeds and loads round off the all-round profile.
With increasing temperatures, the compressive strength of iglidur® P230 plain bearings decreases. The diagram 02 shows this inverse relationship. The recommended maximum surface pressure is a mechanical material parameter. No conclusions regarding the tribological properties can be drawn from this.
Diagram 03 shows the elastic deformation of iglidur® P230 as a function of radial pressure. At the recommended maximum surface pressure of 60 MPa the deformation is less than 3 % at room temperature. A plastic deformation can be negligible up to this value. It is however also dependent on the duty cycle of the load.
iglidur® P230 was developed for low to average surface speeds. During continuous operation, a maximum speed of 1.0 m/s (rotating) or 3.0 m/s (linear) is permissible. The maximum values shown in table 02 can only be achieved at low pressures. At the given speeds, friction can cause a temperature increase to the maximum continuously permissible level. In practice, though, this level is rarely reached due to varying application conditions.
|iglidur® P230||Application temperature|
|In addition secure axially from||+100°C|
Also thanks to its maximum long-term application temperature of +110°C, iglidur® P230 is suitable for a wide range of applications. If even higher temperatures are required, the best-seller iglidur® G (+130°C) or the new standard iglidur® G1 (+180°C) are available. The temperatures prevailing in the bearing system also have an influence on the wear. When temperatures rise, wear increases as well. For temperatures over +100°C an additional securing is required.
Diagram 05 shows results of testing different shaft materials with plain bearings made from iglidur® P230. For rotating movements with 1 MPa radial load, wear on all shafts is low, with the "soft" shaft types providing the higher coefficients of wear. The comparison of pivoting and rotating movements (diagram 06) shows fewer differences than with many other iglidur® materials. The limitation of iglidur® P230 to low to medium loads becomes clear.
|Alcohol||+ up to 0|
|Greases, oils without additives||+|
The humidity absorption of iglidur® P230 bearings amounts to about 0.1 % weight in standard climatic conditions. The saturation limit in water is 0.3 %weight. This low moisture absorption is well below the values of iglidur® M250 or iglidur® G.
Plain bearings made from iglidur® P230 have limited use under radioactive radiation. They are resistant up to a radiation intensity of 3 - 10² Gy.
iglidur® P230 bearings have a good resistance to UV radiation.
In vacuum, any present moisture is released as vapour. Use in vacuum is only possible with dehumidified iglidur® P230 bearings.
iglidur® P plain bearings are electrically insulating.
|Specific volume resistance||> 1012 Ωcm|
|Surface resistance||> 1011 Ω|
|to 3||+0,000 +0,010||+0,014 +0,054||-0,025 +0,000|
|> 3 to 6||+0,000 +0,012||+0,020 +0,068||-0,030 +0,000|
|> 6 to 10||+0,000 +0,015||+0,025 +0,083||-0,036 +0,000|
|> 10 to 18||+0,000 +0,018||+0,032 +0,102||-0,043 +0,000|
|> 18 to 30||+0,000 +0,021||+0,040 +0,124||-0,052 +0,000|
|> 30 to 50||+0,000 +0,025||+0,050 +0,150||-0,062 +0,000|
|> 50 to 80||+0,000 +0,030||+0,060 +0,180||-0,074 +0,000|
|> 80 to 120||+0,000 +0,035||+0,072 +0,212||-0,087 +0,000|
|> 120 to 180||+0,000 +0,040||+0,085 +0,245||-0,100 +0,000|
iglidur® P230 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 E10 tolerances. For particular dimensions the tolerance differs depending on the wall thickness (please see product range table).