|General features||Unit||iglidur® P||test method|
|Max. humidity absorption at 23°C/50% R. H.||% weight||0,2||DIN 53495|
|Max. water absorption||% weight||0,4|
|Coefficient of surface friction, dynamic, against steel||µ||0,06 - 0,21|
|PV values max. (dry)||MPa x m/s||0,39|
|Bending E-module||MPa||5.300||DIN 53457|
|Tensile strength at +20 °C||MPa||120||DIN 53452|
|Maximum recommended surface pressure (20° C)||MPa||50|
|Shore D hardness||75||DIN 53505|
Physical and thermal properties
|Max. long term application temperature||°C||+130|
|Max. short term application temperature||°C||+200|
|Lower application temperature||°C||-40|
|Heat conductivity||[W/m x K]||0,25||ASTM C 177|
|Coefficient of thermal expansion (at +23°C)||[K-1 x 10-5]||4||DIN 53752|
|Specific forward resistance||Ωcm||> 1013||DIN IEC 93|
|Surface resistance||Ω||> 1012||DIN 53482|
The iglidur® P bearings are a cost-effective, maintenance-free bearing solution for the user. Compared to iglidur® G, bearings made of iglidur® P are better suited for rotating motions and high loads.
Maximum recommended surface pressure represents a mechanical material parameter. Tribological conclusions cannot be drawn from it. With increasing temperatures, the compressive strength of iglidur® P plain bearings decreases. Fig. 02 clarifies this connection.
Figure 03 shows the elastic deformation of iglidur® Pwith radial loads. Under the maximum recommended surface pressure of 50 MPa, the deformation amounts to less than 4%.
The iglidur® P bearings are maintenance-free bearings developed for low to medium surface speeds. The maximum values stated in the Table 02 can be attained only with very low surface pressure. The specified maximum speed is the speed at which the long-term permitted temperature is reached by an increase in heat through friction.
|iglidur® P||Application temperature|
|Secure axially in addition||+90°C|
The coefficient of friction lowers like the wear resistance with increasing load (Fig. 04 and 05). iglidur® P bearings reach a distinct minimum coefficient of friction for shafts with a surface finish of 0.1 to 0.2 µm. Both smoother and coarser shafts clearly increase the friction.
|Coefficients of friction µ||0,06 - 0,21||0,09||0,04||0,04|
Figure 06 displays a summary of the results of tests with different shaft materials, which were conducted with iglidur® P plain bearings. In rotating applications, the wear of iglidur® P is very low with CF53 and St37 shafts. In contrast, the bearings are already more worn out than other shaft materials in the lower load range, especially by hard-chromed shafts. At a load of 2 MPa, for example, the Cf53 is superior to the material V2A by six times. The wear rates of low-stressed bearings in pivoting motions with most shaft materials are lower than in rotating applications. For this purpose, the CF53 and hard-chromed shafts prove to be the best counter partners.
|Greases, oils without additives||+|
iglidur® P bearings have a good resistance against chemicals. They are resistant to most lubricants. The iglidur® P is not affected by most weak organic and inorganic acids.
Bearings made of iglidur® P are conditionally usable under radioactive radiation. They are resistant up to a radiation intensity of 5 x 10² Gy.
iglidur® P bearings have a good resistance against UV radiation.
The existent humidity of iglidur® P bearings degasses in the vacuum. The use in vacuum is possible only limitedly.
iglidur® P bearings are electrically insulating.
|Specific forward resistance||> 1013 Ωcm|
|Surface resistance||> 1012 Ω|
|Maximum moisture absorption|
|At +23 °C/50 % r.h.||0,2 % weight|
|Max. water absorption||0,4 % weight|
The humidity absorption of iglidur® 200 bearings amounts to about 0,2% in standard climatic conditions. The saturation limit in water is 0,4 %. This minor humidity absorption is clearly below the values of iglidur® G.
|Up to 3||0 - 0,025||+0,014 +0,054||0 +0,010|
|> 3 to 6||0 - 0,030||+0,020 +0,068||0 +0,012|
|> 6 to 10||0 - 0,036||+0,025 +0,083||0 +0,015|
|> 10 to 18||0 - 0,043||+0,032 +0,102||0 +0,018|
|> 18 to 30||0 - 0,052||+0,040 +0,124||0 +0,021|
|> 30 to 50||0 - 0,062||+0,050 +0,150||0 +0,025|
|> 50 to 80||0 - 0,074||+0,060 +0,180||0 +0,030|
|> 80 to 120||0 - 0,087||+0,072 +0,212||0 +0,035|
|> 120 to 180||0 - 0,100||+0,085 +0,245||0 +0,040|
iglidur® P bearings are standard bearings for shafts with h-tolerance (recommended minimum h9). The bearings are designed for press-fit in a housing with h7 tolerance. After the installation in a housing with nominal diameter, the inner diameter of the bearing automatically adjusts to the E10 tolerance. In certain dimensions the tolerance in dependence on the wall thickness deviates from this (See delivery program )