iglidur® Q2 - Material data

The pressure resistance of iglidur® Q2 plain bearings declines with increasing temperatures. Fig. 02 clarifies this connection. With the long-term permitted application temperature of +130°C, the permitted surface pressure still amounts to 20 MPa. iglidur® Q2 plain bearings represent high load capacities and good abrasion resistance under high loads.
 

Figure 03 shows the elastic deformation of iglidur® Q2 at radial loads.

The typical applications for iglidur® Q2 plain bearings are high load pivoting motions at comparatively low speeds. Independently of that, relatively high speeds are still attainable. The speeds stated in Table 02 are limit values for the lowest bearing loads. As loads increase, the admissible speed is reduced with higher loads due to the limitations of the pv value.

iglidur® Q2 is a very temperature resistant material. The long-term upper temperature limit of +130°C permits the broad use in applications typical of the agricultural, utility vehicle or construction equipment fields. However, the pressure resistance of iglidur® Q2 plain bearings declines as temperatures increase. Additional safety is required at temperatures over +70°C. When considering temperatures, the additional frictional heat in the bearing system must be taken into account.

iglidur® Q2 has a low coefficient of friction. Please note that a gliding partner with a rough surface finish will increase the friction. The highest coefficients of friction occur at Ra = 1 μm. We recommend shaft surface finishes from (Ra) 0.1 to a maximum of 0.4 μm. Furthermore, the coefficient of friction of iglidur® Q2 plain bearings largely depends on the speed and load. As the speed increases, the coefficient of friction will quickly increase as well. However, as the load is reduced, the coefficient of friction initially drops significantly, then moderately.

Generally, we recommend the use of hardened shafts for use in high load applications. Furthermore, even at low to medium loads, iglidur® Q2 will attain increased service life with "hard" shafts as compared to "soft" shafts.
 
But for low load applications, the results are outstanding with free cutting steel as well. For high loads, the wear in pivoting applications is much lower than for rotations. Please contact us in case the shaft material scheduled by you is not included here.

iglidur® Q2 plain bearings have good resistance to chemicals. They are resistant to most lubricants. The resistance is only limited for acids

iglidur® Q2 plain bearings are radiation resistant up to a radioactive intensity of 3 x 10² Gy.

iglidur® Q2 are permanently resistant to UV radiation.

The low water elements degas in the vacuum. Applications under vacuum conditions are possible with restrictions.

iglidur® Q2 plain bearings are electrically insulating.

Under normal climatic conditions, the moisture absorption of iglidur® Q2 plain bearings is less than 1.1 %. The saturation limit in water is 4.6%.

iglidur® Q2 plain bearings are standard bearing for shafts with tolerance h (minimum recommendation is 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. In certain dimensions the tolerance in dependence on the wall thickness deviates from this (See delivery program )