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iglidur J - material data
Maximum surface speed
| m/s | Rotating | Oscillating | linear |
|---|---|---|---|
| permanent | 1.5 | 1.1 | 8 |
| Short-term | 3 | 2.1 | 10 |
Permissible sliding speeds
The low coefficient of friction and the very low stick-slip tendency of iglidur® J plain bearings are particularly important at very low speeds. iglidur® However, J can also be used for high speeds of over 1 m/s. In both cases, the static friction is very low and there is almost no stick-slip. The maximum values given in Table 02 can only be achieved at low pressure loads. At the specified speeds, friction can lead to an increase up to the limit of the permanently permissible temperature. In practice, these limit values cannot always be achieved due to the interaction of various influences.
Friction and wear
| iglidur J | dry | Greases | Oil | Water |
|---|---|---|---|---|
| Coefficients of friction µ | 0.06-0.18 | 0.09 | 0.04 | 0.04 |
Like the wear resistance, the coefficient of friction μ also changes with the load (diagrams 04 and 05).
Shaft materials
Friction and wear are also highly dependent on the mating partner. The coefficient of friction of the mating increases with increasing shaft roughness. A ground surface with an average surface finish Ra = 0.1 to 0.3 μm is most suitable. diagram. 06 and 07 show an extension of the results of tests with different shaft materials that were carried out with iglidur® J plain bearings. Compared to most other iglidur®materials, the wear of iglidur® J bearings is very low at the low load with all tested shaft materials. Even with increasing loads in the range up to 5 MPa, the wear resistance of iglidur® J bearings is outstanding. If your intended shaft material is not included in the test results presented here, please contact us.
Shaft materials
Installation tolerances
iglidur J plain bearings are standard bearings for shafts with h-tolerance (recommended minimum h9). The bearings are designed for press-fit 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. For particular dimensions the tolerance differs depending on the wall thickness (please see product range table).
| Diameter d1 [mm] | Shaft h9 [mm] | iglidur® J E10 [mm] | Housing H7 [mm] |
|---|---|---|---|
| up to 3 | 0 - 0.025 | +0.014 +0.054 | 0 +0.010 |
| > 3 up to 6 | 0 - 0.030 | +0.020 +0.068 | 0 +0.012 |
| > 6 up to 10 | 0 - 0.036 | +0.025 +0.083 | 0 +0.015 |
| > 10 up to 18 | 0 - 0.043 | +0.032 +0.102 | 0 +0.018 |
| > 18 up to 30 | 0 - 0.052 | +0.040 +0.124 | 0 +0.021 |
| > 30 up 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 up to 180 | 0 - 0.100 | +0.085 +0.245 | 0 +0.040 |
Additional properties
Chemical resistance
iglidur® J bearings are resistant to diluted alkalis and very weak acids as well as fuels and all types of lubricants. The low moisture absorption also allows them to be used in wet or damp environments. Plain bearings made from iglidur® J are resistant to common cleaning agents used in the food industry.
Radioactive radiation Bearings made of iglidur® J are resistant to radiation up to a radiation intensity of 3 -102 Gy.
UV resistance iglidur® J bearings discolour under the influence of UV radiation. However, the material properties do not change.
Vacuum In a vacuum, iglidur® J bearings degas. Therefore, only dry bearings are suitable for vacuum.
| Medium | Resistance |
|---|---|
| Alcohols | + |
| Hydrocarbons | + |
| Greases, oils without additives | + |
| Fuels | + |
| Diluted acids | 0 to - |
| Strong acids | - |
| Diluted alkalines | + |
| Strong alkalines | + up to 0 |
Electrical specification iglidur® J plain bearings are electrically insulating.
| Specific transitional resistance | > 1013 Ω cm |
|---|---|
| Surface resistance | > 1012 Ω |
Typical application areas
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