Page 339 - IGUS Bearing

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iglidur iglidur
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UW500 UW500
+250°C +250°C
140 MPa 140 MPa
Bearing technology | Plain bearings | iglidur UW500 Technical data
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General properties Testing method

Density g/cm³ 1.49 -100°C up to
Ø Colour black +250°C
–
Max. moisture absorption at +23°C/50% r.h. % weight 0.1 DIN 53495
Max. moisture absorption 6) % weight 0.5
Coefficient of friction, dynamic, against steel µ 0.20-0.36 140 MPa
pv value, max. (dry) MPa · m/s 0.35
Also available
as: Mechanical properties
For hot liquids Flexural modulus MPa 16,000 DIN 53457
Flexural strength at +20°C
260
DIN 53452
MPa
Continuous wear resistance in liquids Compressive strength MPa 140
Bar stock, Max. permissible surface pressure (+20°C) MPa 140
round bar
Page 743 Shore D hardness 86 DIN 53505
iglidur UW500 was developed for underwater applications at higher temperatures up to +250°C. In
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addition, the plain bearings will run in chemicals which would act as a lubricant. Physical and thermal properties
● High temperature resistance Max. application temperature long-term °C +250 FOOD
● Suitable for high surface speeds Max. application temperature short-term °C +300
● Lubrication-free Min. application temperature °C -100
Bar stock, ● Suitable for underwater applications Thermal conductivity W/m · K 0.60 ASTM C 177
plate -1 -5
Page 773 ● Maintenance-free Coefficient of thermal expansion (at +23°C) K · 10 4 DIN 53752
Electrical properties 5)
Typical application areas Specific transitional resistance Ωcm < 10 9 DIN IEC 93
● Plant construction Surface resistance Ω < 10 9 DIN 53482
● Pumps 5) The good conductivity of this material can favour the generation of corrosion on the metallic contact components.
tribo-tape liner ● Chemical industry 6) All results were obtained under laboratory conditions with demineralised water. For application with direct water
Page 781 contact, we recommend tests under real application conditions.
Table 01: Material properties

The plain bearings made from iglidur UW500 were Resistance to weathering
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developed for underwater applications with high iglidur UW500 plain bearings are continuously resistant
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temperatures. Examples for this are water pumps in to weathering. The material properties are only slightly
Guide rings automotive engineering, but also the field of medical affected. Possible discolourations are only superficial.
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engineering and related sectors. Unless the underwater
Descriptive technical specifications operation is explicitly stated, the information in this chapter Mechanical properties
describes iglidur UW500 in dry operation. When temperatures increase, the compressive strength
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Wear resistance at +23°C – +
of iglidur UW500 plain bearings decreases. Diagram
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Wear resistance at +90°C – + Moisture absorption 02 shows this inverse relationship. The maximum
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Two hole Wear resistance at +150°C – + The moisture absorption of iglidur UW500 plain bearings recommended surface pressure is a mechanical material
flange is below 0.1% weight in ambient conditions. The maximum parameter. No conclusions regarding the tribological
bearings
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Page 667 Slide property – + moisture absorption is 0.5% weight. iglidur UW500 plain properties can be drawn from this.
bearings can be used for underwater applications. Diagram 03 shows the elastic deformation of iglidur UW500
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Wear resistance under water – +
under different loads.
Media resistance – + Vacuum Surface pressure, page 45
In vacuum, any present moisture is released as vapour.
Moulded Resistant to edge pressures – +
special parts The use in vacuum is generally possible.
Page 696 Resistant to shock and impact loads – +
Radiation resistance
Dirt resistance – +
Plain bearings made from iglidur UW500 are resistant up
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to a radiation intensity of 1 · 10⁵ Gy. They resist to hard
gamma radiation (1,000Mrad) and alpha or beta radiation
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igubal Online product finder Online service life calculation (10,000Mrad).
spherical balls
Page 993 www.igus-asean.com/iglidur-finder www.igus-asean.com/iglidur-expert ASEAN 09/2023 ASEAN 09/2023
336 3D-CAD, finder and service life calculation ... www.igus-asean.com/UW500 Lubrication-free made easy ... from stock ... no minimum order quantity 337