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         iglidur                                                                                                                                                                                                                  iglidur  
              ®
         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.
          Page 641
                                                                                                                                    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
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