Page 231 - IGUS Bearing

iglidur L250 iglidur L250
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+90°C +90°C
45MPa 45MPa
Bearing technology | Plain bearings | iglidur L250 Technical data
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General properties Testing method

Density g/cm³ 1.50 -40°C up to
Ø Colour beige +90°C
6.0-20.0mm
Max. moisture absorption at +23°C/50% r.h. % weight 0.7 DIN 53495
Max. moisture absorption % weight 3.9
Coefficient of friction, dynamic, against steel µ 0.08-0.19 45MPa
pv value, max. (dry) MPa · m/s 0.40
Also available
as: Mechanical properties
For fast rotating applications Flexural modulus MPa 1,950 DIN 53457
67
DIN 53452
Flexural strength at +20°C
MPa
Low coefficient of friction under low load Compressive strength MPa 47
Bar stock, Max. permissible surface pressure (+20°C) MPa 45
round bar
Page 743 Shore D hardness 68 DIN 53505
Plain bearings for high speed rotation applications, especially for fans and motors.
● Suitable for high rotating speeds Physical and thermal properties
● Low coefficient of friction Max. application temperature long-term °C +90 FOOD
● Very wear-resistant Max. application temperature short-term °C +180
● Lubrication-free Min. application temperature °C -40
Bar stock, ● Maintenance-free Thermal conductivity W/m · K 0.24 ASTM C 177
plate -1 -5
Page 773 Coefficient of thermal expansion (at +23°C) K · 10 10 DIN 53752
Typical application areas Electrical properties
● Automotive industry Specific transitional resistance Ωcm > 10 10 DIN IEC 93
● Electronics industry Surface resistance Ω > 10 11 DIN 53482
● Mechatronics Table 01: Material properties
tribo-tape liner ● Optical industry
Page 781 ● Test engineering and quality assurance iglidur L250 is a bearing material for high rotation speeds Resistance to weathering
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and low coefficient of friction. The iglidur L250 material iglidur L250 plain bearings have limited resistance
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can highlight these advantages particularly with low to weathering. The material properties are affected.
loads. Applications which feature these advantages are Discolouration occurs. Practical tests under real applica-
fans, small motors, fast-running sensors or the magnet tion conditions are recommended.
technology.
Guide rings
Page 641 Mechanical properties
Moisture absorption When temperatures increase, the compressive strength of
Descriptive technical specifications With regard to applications where the smallest bearing iglidur L250 plain bearings decreases. Diagram 02 shows
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Wear resistance at +23°C – + clearances are concerned, please take the moisture this inverse relationship. The maximum recommended
absorption into consideration. surface pressure is a mechanical material parameter. No
Wear resistance at +90°C – +
conclusions regarding the tribological properties can be
Two hole Wear resistance at +150°C – + Vacuum drawn from this.
flange
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bearings In vacuum, any present moisture is released as vapour. Use Diagram 03 shows the elastic deformation of iglidur L250
Page 667 Slide property - +
in vacuum is only possible with dehumidified iglidur L250 under different loads. At the recommended maximum
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Wear resistance under water – + bearings. surface pressure of 45MPa the deformation is less than
3% at room temperature. A plastic deformation can be
Media resistance – +
Radiation resistance negligible up to this value. It is however also dependent
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Moulded Resistant to edge pressures – + Plain bearings made from iglidur L250 are resistant up to on the duty cycle of the load.
special parts a radiation intensity of 3 · 10⁴ Gy. Higher radiation weakens Surface pressure, page 45
Page 696 Resistant to shock and impact loads – +
the material and may result in a significant decrease in
Dirt resistance – + mechanical properties.

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