Page 503 - IGUS Bearing

iglidur Q290 iglidur Q290
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+140°C +140°C
55MPa 55MPa
Bearing technology | Plain bearings | iglidur Q290 Technical data
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General properties Testing method

Density g/cm³ 1.27 -40°C up to
Ø 20.0- Colour black +140°C
80.0mm
Max. moisture absorption at +23°C/50% r.h. % weight 3 DIN 53495
Max. moisture absorption % weight 9.3
Coefficient of friction, dynamic, against steel µ 0.14-0.26 55MPa
pv value, max. (dry) MPa · m/s 0.70
Also available
as: Mechanical properties
Heavy-duty on soft shafts Flexural modulus MPa 3,074 DIN 53457
DIN 53452
97
MPa
Flexural strength at +20°C
For medium to high loads, especially on soft shafts Compressive strength MPa 68
Bar stock, Max. permissible surface pressure (+20°C) MPa 55
round bar
Page 743 Shore D hardness 80 DIN 53505
iglidur Q290 shows outstanding service life in tough pivoting applications, as they are frequently found
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in agricultural machinery, especially on "soft" coated shafts (e.g. galvanised). The wear on the shafts is Physical and thermal properties
minimal. Max. application temperature long-term °C +140 FOOD
● Recommended for soft shafts Max. application temperature short-term °C +180
● Suitable for high edge pressures Min. application temperature °C -40
Bar stock, ● Temperature-resistant up to +140°C Thermal conductivity W/m · K 0.24 ASTM C 177
plate -1 -5
Page 773 ● Good price-performance ratio Coefficient of thermal expansion (at +23°C) K · 10 7 DIN 53752
● Lubrication-free Electrical properties
● Maintenance-free Specific transitional resistance Ωcm > 10 12 DIN IEC 93
Surface resistance Ω > 10 12 DIN 53482
Typical application areas Table 01: Material properties
tribo-tape liner ● Agricultural engineering
Page 781 ● Utility and construction vehicles iglidur Q290 plain bearings do not have the highest static Resistance to weathering
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load capacity within the iglidur product range, instead the iglidur Q290 plain bearings are resistant to weathering.
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material shows its strengths at medium to high dynamic The material properties are significantly affected. Severe
loads: outstanding service life is achieved for tough discolouration occurs. Applications with this material under
pivoting applications, e.g. in agricultural or construction weathering conditions are not recommended.
machinery, and especially on "soft" shafts, for both the
Guide rings
Page 641 shafts and bearings! Mechanical properties
With increasing temperatures, the compressive strength
Descriptive technical specifications Moisture absorption of iglidur Q290 plain bearings decreases. Diagram 02
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Wear resistance at +23°C – + The humidity absorption of iglidur Q290 bearings amounts shows this inverse relationship. At the short-term permitted
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to about 0.3% weight in standard climatic conditions. The application temperature of +180°C, the permitted surface
Wear resistance at +90°C – +
saturation limit submerged in water is 9.3% weight. pressure is still 10MPa. The maximum recommended
Two hole Wear resistance at +150°C – + surface pressure is a mechanical material parameter. No
flange
bearings Vacuum conclusions regarding the tribological properties can be
Page 667 Slide property – +
In vacuum, any present moisture is released as vapour. drawn from this.
Wear resistance under water – + The use in vacuum is only possible to a limited extent. Diagram 03 shows the elastic deformation of iglidur Q290
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under different loads. These high elastic deformation values,
Media resistance – +
Radiation resistance even for loads of more than 50MPa, contribute significantly
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Moulded Resistant to edge pressures – + Plain bearings made from iglidur Q290 are resistant up to the long service life under tough environmental
special parts to a radiation intensity of 3 · 10² Gy. conditions such as edge loads, collisions and impacts.
Page 696 Resistant to shock and impact loads – +
Surface pressure, page 45
Dirt resistance – +

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