iglidur® Q290 - material data

The strengths of iglidur Q290 are evident in medium to high dynamic loads: In robust pivoting applications, e.g. in agricultural or construction machinery, and specifically on "soft" shafts (e.g. galvanised), excellent service lives are achieved - for shaft and bearing.

The long-term upper temperature limit of +140°C permits broad use e.g. in applications typical for the agricultural, utility vehicle or construction equipment sectors. For temperatures over +80°C an additional locating spigot is required.

Temperatures, coefficient of thermal expansion

The typical applications for iglidur Q290 plain bearings are medium to highly loaded pivoting movements with rather low speeds. Irrespective of this, high maximum speeds can certainly be achieved. The speeds given in the table are limit values for low bearing loads. They say nothing about the wear resistance at these parameters.

Surface speeds of various iglidur materials

Please note that a mating surface that is too rough will increase the friction. The coefficient of friction of iglidur Q290 also increases with increasing speed (diagram 04). In contrast, the coefficient of friction drops continually with the radial load, as illustrated by diagram 05.

Coefficient of friction against steel (Ra = 1μm, 50 HRC):

All data at room temperature [+20 °C],     + resistant      0 conditionally resistant      - non-resistant

iglidur Q290 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 installation in a housing with nominal dimensions, the inner diameter of the bearings with E10 tolerance adjusts automatically. For certain dimensions, the tolerance deviates from this depending on the wall thickness (see product range).

Important tolerances according to ISO 3547-1 after press-fit: