|Genera l features||Unit||iglidur® T220||test method|
|Max. humidity absorption at 23°C/50% R. H.||% weight||0,3||DIN 53495|
|Max. water absorption||% weight||0,5|
|Coefficient of surface friction, dynamic, against steel||μ||0,20-0,32|
|pv value, max. (dry)||MPa x m/s||0,28|
|Bending E-module||MPa||1.800||DIN 53457|
|Tensile strength at +20 °C||MPa||65||DIN 53452|
|Maximum recommended surface pressure (20° C)||MPa||40|
|Shore D-hardness||76||DIN 53505|
Physical and thermal properties
|Max. long term application temperature||°C||+100|
|Max. short term application temperature||°C||+160|
|Minimum application temperature||°C||-40|
|thermal / heat conductivity||W/m x K||0,24||ASTM C 177|
|Coefficient of thermal expansion (at 23° C)||K–1 x 10–5||11||DIN 53753|
|Specific forward resistance||Ωcm||> 1010||DIN IEC 93|
|surface resistance||Ω||> 1010||DIN 53482|
|1) Without additional load; no gliding movement; relaxation not excluded.|
iglidur® T220 is a special material for application in the tobacco processing industry. It fulfills the demands of the tobacco industry (engineering database). The material is free of undesirable or banned ingredients, as requested by reputed manufacturers from 2004 onward.
Maximum recommended surface pressure represents a mechanical material parameter. Tribological conclusions cannot be drawn from it.
The pressure resistance of iglidur® T220
bearings declines with increasing temperatures. Fig. 02 clarifies this connection.
iglidur® T220 bearings can be stressed up to the permitted limit of 45 MPa. The deformation is then virtually at 2%. The permitted load is limited by higher temperatures. (Fig. 02).
|iglidur® T220||Operating temperature|
|Lower||- 40 °C|
|Upper, long-term||+ 100 °C|
|Upper, short-term||+ 160 °C|
|Secure axially in addition||+ 50 °C|
By complying with the requirements established by the tobacco processing industry, the coefficients of friction and wear of the iglidur® T220 bearings are clearly behind those of the best iglidur® bearings. The coefficient of friction decreases with the load while it increases only slightly at higher speeds.
|Coefficients of friction µ||0,2 - 0,32||0,09||0,04||0,04|
Fig. 06 shows the test results with different
shaft materials conducted with bearings
made of iglidur® T220.
Figure 07 shows that with increase in load, the bearing responds with stronger increase in wear. Therefore care should be taken to maintain the loads under 5 MPa through adequate dimensioning of the bearing.
|Fats, oils, without additives||+|
|Specific forward resistance||> 1010 Ωcm|
|Surface resistance||> 1010 Ω|
iglidur® T220 bearings are resistant to highly diluted alkalis and very weak acids.
iglidur® T220 bearings are radiation resistant up to a radioactive intensity of 3 x 10² Gy.
iglidur® T220 bearings are not resistant to the influence of UV rays.
The use in vacuum is possible only conditionally. Only dry bearings made of iglidur® T220 should be tested in vacuum.
Bearings made of iglidur® T220 are electrically insulating.
The iglidur® T220 bearings are manufactured according to order specifications.
|Maximum moisture absorption|
|by +23 °C/50 % r. F.||0,3 weight-%|
|Max. water absorption||0,5 weight-%|
The humidity absorption of iglidur® 200 bearings amounts to about 0,3% in standard climatic conditions. The saturation limit in water is 0,5 %. These values are so low that a moisture expansion need to be considered only in extreme cases.
|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® T220- 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 bore with H7 tolerance, the inner diameter of the bearing automatically adjusts to the E10 tolerance.