iglidur® A160 - Material data

With increasing temperatures, the compressive strength of iglidur® A160 bearings decreases. Fig. 02 clarifies this connection. Maximum recommended surface pressure represents a mechanical material parameter. Tribological conclusions cannot be drawn from it.
 
Figure 03 shows the elastic deformation of iglidur® A160 with radial loads. Under the maximum recommended surface pressure of 15 MPa, the deformation amounts to less than 3,0%. A plastic deformation is negligible up to this radial load. It is however also dependent on the period of exposure.

iglidur® A160 is developed for low surface speeds. Maximum speeds up to 0,5 m/s (rotating) and 2,0 m/s (linear) respectively are permitted for continuous application in dry operation. The values specified in Table 02 state the limits to which the long-term permitted temperature rises due to friction heat. In practice these limit values are not always reached due to interactions.

With increasing temperatures, the compressive strength of iglidur® A160 plain bearings decreases. Fig. 02 clarifies this connection. The temperatures prevailing in the bearing system also have an influence on the bearing wear. An additional securing is recommended at temperatures higher than +60°C.

Coefficient of friction and wear resistance alter with the application parameters. In the iglidur® A160 bearings, the alteration of the friction coefficient µ dependent on surface speed and the shaft's surface finish is only negligently pronounced. However, the friction value drops significantly as the load increases. The ideal surface roughness of the shaft in relation to the friction value is at 0.6-0.7 Ra.

Figure 06 displays a summary of the results of tests with different shaft materials, which were conducted with iglidur® A160 plain bearings in dry operation. For rotational applications with low loads, the most interesting media- and corrosion-resistant shaft materials V2A, X90 and hard chrome-plated steel reveal themselves as good counter-partners. On X90 shafts, however, the wear increases the fastest with the load (Fig. 06). With Cf53 shafts, the wear in swivelling applications is exemplary compared to rotating applications. In rotation the wear, as with many other iglidur® materials, is higher than in the swivelling.

iglidur® A160 bearings can be used under various environmental conditions and in contact with numerous chemicals. Table 05 gives an overview of the chemical resistance of iglidur® A160 bearings at room temperature.

iglidur® A160 bearings are radiation resistant up to a radioactive intensity of 1 · 10⁵ Gy. Higher radiations affect the material and can lead to the loss of important mechanical properties.

iglidur® A160 plain bearings are partially resistant to the impact of UV radiation.

In application in vacuum, the potentially existent moisture content is degassed. For this reason only the dry iglidur® A160 bearings are suitable for vacuum.

The iglidur® A160 bearings absorb up to 0.1% water through atmospheric humidity (+23°C, 50% relative atmospheric humidity), when saturated with water they absorb 0,1%.

Iglidur® A160- 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 E10 tolerance.