|General properties||Unit||iglidur® AB||Testing method|
|Density||g/cm³||1,11||DIN EN ISO 1183-1|
|Max. moisture absorption at 23 °C / 50% r.h.||% weight||0,8||ISO 175|
|Max. water absorption||% weight||1,6||ISO 62|
|Coefficient of surface friction, dynamic, against steel||µ||0,18 - 0,31|
|pv value, max. (dry)||MPa x m/s||0,25|
|Modulus of elasticity||MPa||1.850||DIN EN ISO 178|
|Flexural strength at 20 °C||MPa||50||DIN EN ISO 178|
|Recommended max. surface pressure (20 °C)||MPa||25|
|Shore-D hardness||70||DIN 53505|
Physical and thermal properties
|Max. long-term application temperature||°C||+70|
|Max. short-term application temperature||°C||+140|
|Lower application temperature||°C||-40|
|Heat conductivity||[W/m x K]||0,24||ASTM C 177|
|Coefficient of thermal expansion (at +23 °C)||[K-1 x 10-5]||10||DIN 53752|
|Specific contact resistance||Ωcm||> 1012||DIN IEC 93|
|Surface resistance||Ω||> 1012||DIN 53482|
iglidur® AB was specially developed for applications in areas with hygienic requirements. These types of applications often involve manually actuated pivoting units (doors, furniture in the medical sector, etc.). The material reduces the level of bacterial contamination but – like all "anti-bacterial" materials – is not a substitute for adequate hygienic measures.
With increasing temperatures, the compressive strength of iglidur® AB plain bearings decreases. 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® AB at radial loads. A possible deformation could be, among others, dependant on the duty cycle of the load.
iglidur® AB is mainly suitable for low speeds in dry running, but the specified values shown in table 03 can only be achieved at low pressures. At the given speeds, friction can cause a temperature increase to maximum permissible levels. In practice, though, this temperature level is rarely reached due to varying application conditions.
|C. o. f. µ||0,11 - 0,21||0,09||0,04||0,04|
The friction and wear are also dependent, to a large degree, on the shaft material. Shafts that are too smooth, increase both the coefficient of friction and the wear of the bearing. Diagram 06 shows a summary of the results of tests with different shaft materials. When rotating at a load of 1 MPa, the wear on all tested shafts is very similar. Only the hard-anodised aluminium shafts cause a noticeable increase in the wear. As illustrated in diagram 07, the wear rate from pivoting and rotating movements at loads in increasing levels is also quite similar if the remaining parameters are identical.
|Alcohol||+ to 0|
|Greases, oils without additives||+|
|Diluted acids||0 to -|
|Specific contact resistance||> 1013 Ω cm|
|Surface resistance||> 1012 Ω|
Plain bearings made from iglidur® AB are resistant to radiation up to an intensity of 3 · 102 Gy.
iglidur® AB bearings change colour under the influence of UV rays. However, hardness, compressive strength and the wear resistance of the material do not change.
In vacuum applications, any absorbed moisture content is outgassed. Use in a vacuum environment is only possible with dehumidified bearings.
|At +23 °C/50 % r.h.||0,2 % weight|
|Max. water absorption||0,4 % weight|
The humidity absorption of iglidur® AB bearings amounts to about 0.8 % weight in standard climatic conditions. The saturation limit submerged in water is 1.6 % weight.
|to 3||0 - 0,025||+0,014 +0,054||0 +0,010|
|> 3 bis 6||0 - 0,030||+0,020 +0,068||0 +0,012|
|> 6 bis 10||0 - 0,036||+0,025 +0,083||0 +0,015|
|> 10 bis 18||0 - 0,043||+0,032 +0,102||0 +0,018|
|> 18 bis 30||0 - 0,052||+0,040 +0,124||0 +0,021|
|> 30 bis 50||0 - 0,062||+0,050 +0,150||0 +0,025|
|> 50 bis 80||0 - 0,074||+0,060 +0,180||0 +0,030|
iglidur® AB plain bearings are standard bearings for shafts with h-tolerance (recommended minimum h9). The bearings are designed for pressfit 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. In relation to the installation tolerance, the inner diameter changes with the absorption of humidity. For particular dimensions the tolerance differs depending on the wall thickness (please see product range table).