Page 114 - IGUS Bearing

iglidur M250 iglidur M250
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+80°C +80°C
210MPa 210MPa
Bearing technology | Plain bearings | iglidur M250 Technical data
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General properties Testing method

Density g/cm³ 1.14 -40 °C up to
Ø Colour dark grey +80 °C
1.0-75.0mm
Max. moisture absorption at +23°C/50% r.h. % weight 1.4 DIN 53495
Max. moisture absorption % weight 7.6
Coefficient of friction, dynamic, against steel µ 0.18 -0.40 210MPa
pv value, max. (dry) MPa · m/s 0.12
Also available
as: Mechanical properties
The robust all-rounder according to ISO 2795 Flexural modulus MPa 2,700 DIN 53457
DIN 53452
112
MPa
Flexural strength at +20°C
Excellent vibration dampening Compressive strength MPa 52
Bar stock, Max. permissible surface pressure (+20°C) MPa 20
round bar
Page 743 Shore D hardness 79 DIN 53505
The self-lubricating plain bearings made of iglidur M250 are characterised by impact strength, vibration
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dampening and wear resistance. They prove themselves particularly well under stresses in which the Physical and thermal properties
vibration dampening of the bearings is required, e. g. in sports equipment and packaging machines. Max. application temperature long-term °C +80 FOOD
● Over 450 sizes available from stock Max. application temperature short-term °C +170
● Excellent vibration dampening Min. application temperature °C -40
Bar stock, ● Suitable for high edge pressures Thermal conductivity W/m · K 0.24 ASTM C 177
plate -1 -5
Page 773 ● Suitable for impact loads Coefficient of thermal expansion (at +23°C) K · 10 10 DIN 53752
● Thick-walled according to ISO 2795 Electrical properties
● Dirt can become embedded for shaft protection Specific transitional resistance Ωcm > 10 13 DIN IEC 93
● Lubrication-free Surface resistance Ω > 10 11 DIN 53482
● Maintenance-free Table 01: Material properties
tribo-tape liner ● Thrust washers available only in imperial sizes, from page 1147
Page 781 The self-lubricating plain bearings made of iglidur M250 Resistance to weathering
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Typical application areas are characterised by impact strength, vibration dampening iglidur M250 plain bearings are not resistant to weathering.
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● Agricultural machines and wear resistance. They prove themselves particularly The material properties are significantly affected. Discolouration
● Furniture/Industrial design well under stresses in which the vibration dampening of occurs. Practical tests under real application conditions are
● Textile industry the bearings is required, e.g. in sports equipment and strongly recommended.
● Doors and gates packaging machines. Since they are additionally able to
Guide rings
Page 641 ● Mechanical engineering absorb dirt, they are also suited for agricultural machines Mechanical properties
and garden appliances. When temperatures increase, the compressive strength of
Descriptive technical specifications iglidur M250 plain bearings decreases. Diagram 02 shows
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Wear resistance at +23°C – + Moisture absorption this inverse relationship. The maximum recommended
The moisture absorption of iglidur M250 plain bearings surface pressure is a mechanical material parameter. No
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Wear resistance at +90°C – +
in ambient conditions is approximately 1.4% weight. The conclusions regarding the tribological properties can be
Two hole Wear resistance at +150°C – + saturation limit submerged in water is 7.6% weight. This drawn from this.
flange
bearings must be taken into account for these types of applications. iglidur M250 plain bearings can withstand a maximum
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Page 667 Slide property – +
recommended surface pressure of 20MPa. Compared
Wear resistance under water – + Vacuum with other iglidur materials iglidur M250 plain bearings
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In vacuum, any present moisture is released as vapour. are highly elastic. By this elasticity they can yield very well,
Media resistance – +
The use in vacuum is only possible to a limited extent. but retain their original shape again. A plastic deformation
Moulded Resistant to edge pressures – + is minimal up to the maximum recommended surface
special parts Radiation resistance pressure.
Page 696 Resistant to shock and impact loads – +
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Plain bearings made from iglidur M250 have limited use Surface pressure, page 45
Dirt resistance – + under radioactive radiation. They are resistant up to a
radiation intensity of 1· 10⁴ Gy.

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112 3D-CAD, finder and service life calculation ... www.igus-asean.com/M250 Lubrication-free made easy ... from stock ... no minimum order quantity 113