|General features||Unit||iglidur® J200||test method|
|Max. humidity absorption at 23°C/50% R. H.||% weight||0,2||DIN 53495|
|Max. water absorption||% weight||0,7|
|Coefficient of surface friction, dynamic, against steel||μ||0,11-0,17|
|PV values max. (dry)||MPa x m/s||0,30|
|Bending E-module||MPa||2800||DIN 53457|
|Tensile strength at +20 °C||MPa||58||DIN 53452|
|Maximum recommended surface pressure (20° C)||MPa||23|
|Shore D hardness||70||DIN 53505|
Physical and thermal properties
|Max. long term application temperature||°C||+90|
|Max. short term application temperature||°C||+120|
|Upper short-term ambient temperature1)||°C||+140|
|Lower application temperature||°C||-50|
|Heat conductivity||W/m x K||0,24||ASTM C 177|
|Coefficient of thermal expansion (at 23° C)||K-1 x 10-5||8||DIN 53752|
|Specific forward resistance||Ωcm||> 108||DIN IEC 93|
|Surface resistance||Ω||> 108||DIN 53482|
|1) Without additional load; no gliding movement; relaxation not excluded.|
iglidur® J200 is the result of the development of a particularly low-friction plain bearing. The friction plays a crucial role particularly in linear applications. Whereas many materials have excellent coefficients of friction under high loads, iglidur® J200 is characterized by its property to retain very good coefficients of friction in low loads as well.
Maximum recommended surface pressure represents a mechanical material parameter.
Tribological conclusions cannot be drawn from it. With increasing temperatures, the compressive strength of iglidur® J200 plain bearings decreases.
Fig. 02 clarifies this connection.
Under the maximum permitted load of 23 MPa, the deformation amounts to 3.5% (Fig. 03). A plastic deformation can be negligible up to this value. It is however also dependent on the period of exposure.
iglidur® J200 attains high surface speeds through its excellent coefficients of friction. Continuous rotary speeds of 1 m/s are possible. The permitted speeds are clearly higher yet in linear movements or in short-term operation. Speeds of over 15 m/s were successfully tested in linear movements.
|iglidur® J200||Operating temperature|
|Lower||- 50 °C|
|Upper, long-term||+ 90 °C|
|Upper, short-term||+ 120 °C|
|Secure axially in addition||+ 60 °C|
The maximum permitted temperature of +120°C should not be exceeded. Thereby the temperature generated by friction has to be added. From 60°C onward, the bearing should be additionally mechanically fastened, so that the danger of the bearing creeping out of the bore is avoided. The wear resistance too declines disproportionately from 70°C.
Among all the iglidur® materials, iglidur® J200 exhibits the lowest coefficients of friction. The average coefficient of friction of all measurements, even with different shaft materials, is 0.11 μ. As a counter partner hard-anodised aluminium assumes special importance.
The comparison with the rest of the iglidur® materials makes it clear that iglidur® J200 bearings are suitable for rather low loads. The influence of surface speed and load on the friction coefficient is not very pronounced. The decrease of friction coefficient with the load is within the normal range (Fig. 04 and 05). Regarding the shaft surface finish, the optimum is in the range of 0.2 to 0.4 Ra. The influence of the shaft is in contrast very large in wear resistance. It is worth a look at the extensive wear data bank at low loads.
|Coefficients of friction µ||0,11 - 0,17||0,09||0,04||0,04|
The used shaft material has a large influence on the wear resistance. Although all shaft materials (soft or hardened) are suitable for use with iglidur® J200, the best results are obtained with hard anodized aluminum. This counter partner has proved itself particularly in linear movements.
|Greases, oils without additives||+|
|Diluted acids||0 to -|
|Strong bases||+ to 0|
|Specific forward resistance||> 108 Ωcm|
|Surface resistance||> 108 Ω|
iglidur® J200 bearings are resistant to diluted alkalis as well as to solvents and most lubricants.
iglidur® J200 bearings are radiation resistant up to a radioactive intensity of 3 x 10² Gy.
iglidur® J200 bearings are very resistant to the influence of UV rays.
The use in vacuum is possible only conditionally. Only dry bearings made of iglidur® J200 should be tested in vacuum.
Bearings made of iglidur® J200 are electrically insulating.
The iglidur® J200 bearings are manufactured according to order specifications.
|Maximum moisture absorption|
|by +23 °C/50 % r. F.||0,2 weight-%|
|Max. water absorption||0,7 weight-%|
The humidity absorption of iglidur® 200 bearings amounts to about 0,2% in standard climatic conditions. The saturation limit in water is 0,7 %. 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® J200 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 H7, 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 )