|General features||Unit||iglidur® J350||test method|
|Max. humidity absorption at 23°C/50% R. H.||% weight||0,3||DIN 53495|
|Max. water absorption||% weight||1,6|
|Coefficient of surface friction, dynamic, against steel||µ||0,01 - 0,20|
|PV values max. (dry)||MPa x m/s||0,45|
|Bending E-module||MPa||2.000||DIN 53457|
|Tensile strength at +20 °C||MPa||55||DIN 53452|
|Maximum recommended surface pressure (20° C)||MPa||60|
|Shore D hardness||80||DIN 53505|
Physical and thermal properties
|Max. long term application temperature||°C||+180|
|Max. short term application temperature||°C||+220|
|Lower application temperature||°C||-100|
|Heat conductivity||W/m x K||0,24||ASTM C 177|
|Coefficient of thermal expansion (at 23° C)||K-1 x 10-5||7||DIN 53752|
|Specific forward resistance||Ωcm||> 1013||DIN IEC 93|
|Surface resistance||Ω||> 1010||DIN 53482|
iglidur® J350 combines universally good wear resistance, flexibility and temperature resistance into a very versatile iglidur® material with a broad application spectrum.
Maximum recommended surface pressure represents a mechanical material parameter. Tribological conclusions cannot be drawn from it. With increasing temperatures, the compressive strength of iglidur® J350 plain bearings decreases. Fig. 02 clarifies this connection.
iglidur® J350 plain bearings are suitable for high and medium loads. Fig. 03 shows the deformation under temperature. The behavior of materials under short-term stress is shown here. Different ambient temperatures make this noticeable only from about 60 MPa.
|iglidur® J350||Application temperature|
|Upper, long-term||+180 °C|
|Upper, short-term||+220 °C|
|Secure axially in addition||+140 °C|
The temperatures prevailing in the bearing system also have an influence on the bearing wear. The wear rate of the iglidur® J350 bearings changes only slightly at higher temperatures. Sometimes the wear decreases even at 100°C. An additional securing is recommended at temperatures higher than +140°C.
The coefficients of friction of iglidur® J350 in dry operation against steel lie in a very good range. They decrease significantly at higher surface speeds. This benefits the service life of the bearings in continuous operations with high surface speeds. Fig. 04 clarifies this connection. Especially with loads larger than 2 MPa, the iglidur® J350 bearings are clearly superior to other bearings in rotating applications.
Figure 06 and 07 show a summary of the results of tests with different shaft materials. iglidur® J350 plain bearings are suitable for all gliding partners. A pairing however comes to mind when you look at the wear data of the tests: iglidur® J350 against V2A. There are not many bearing materials that are suitable for the otherwise rather difficult shaft partner stainless steel (V2A) and achieve best wear rates. Excellent wear results can also be observed with hard-anodized aluminum shafts. Please contact us in case the shaft material scheduled by you is not included here.
|Coefficients of friction μ||0,1–0,2||0,09||0,04||0,04|
|Hydrocarbons||+ to 0|
|Fats, oils, without additives||+|
|Strong acids||+ to 0|
iglidur® J350 bearings are electrically insulating.
|Specific forward resistance||> 1013 Ωcm|
|Surface resistance||> 1010 Ω|
iglidur® J350 plain bearings are resistant to diluted acids and alkalis, alcohols, detergents and lubricants. iglidur® J350 is affected by esters, ketones, chlorinated hydrocarbons, aromatics and highly polar solvents.
iglidur® J350 bearings are radiation resistant up to a radioactive intensity of 2 · 10² Gy.
iglidur® J350 bearings are partially resistant against UV rays.
In a vacuum, iglidur® J350 bearing outgases only to a very small extent. The application in vacuum is possible only for dry bearings.
|Maximum moisture absorption|
|by +23 °C/50 % r. F.||0,3 weight-%|
|Max. water absorption||1,6 weight-%|
The moisture absorption of iglidur® J350 is low and can be disregarded when using standard bearings. Even at full saturation the iglidur® J350 does not absorb more than 1,6% of water.
|Up to 3||0 - 0,025||+0,006 +0,046||0 +0,010|
|> 3 to 6||0 - 0,030||+0,010 +0,058||0 +0,012|
|> 6 to 10||0 - 0,036||+0,013 +0,071||0 +0,015|
|> 10 to 18||0 - 0,043||+0,016 +0,086||0 +0,018|
|> 18 to 30||0 - 0,052||+0,020 +0,104||0 +0,021|
|> 30 to 50||0 - 0,062||+0,025 +0,125||0 +0,025|
|> 50 to 80||0 - 0,074||+0,030 +0,150||0 +0,030|
iglidur® J350 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 F10 tolerance. In certain dimensions the tolerance in dependence on the wall thickness deviates from this (See delivery program )