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iglidur  G                                                                                                                                                                                                               iglidur  G
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         +130°C                                                                                                                                                                                                                   +130°C
          80MPa                                                                                                                                                                                                                   80MPa
                      Bearing technology | Plain bearings | iglidur  G                                                              Technical data
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          Permissible surface speeds                         Installation tolerances                                                  100.0                                               0.35
          iglidur  G has been developed for low to medium surface   iglidur  G plain bearings are standard bearings for shafts         10.0                                               0.30
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          speeds. The maximum values shown in table 03 can only   with  h-tolerance (recommended minimum  h9).  The                                                                       0.25
          be achieved at low pressures. At the given speeds, friction   bearings are designed for press-fit into a housing machined     1.0                                               0.20
          can cause a temperature increase to maximum permissible   to a H7 tolerance. After being assembled into a nominal                                                               0.15
          levels. In practice, though, this level is rarely reached due   size housing, the inner diameter automatically adjusts to   Surface pressure [MPa]  0.1                       Coefficient of friction [µ]  0.10
          to varying application conditions.                 the E10 tolerances. For particular dimensions the tolerance                                                                  0.05
                                                                                                                                                                                          0.00
          Surface speed, page 48                             differs depending on the wall thickness (please see product               0.01  0.001   0.01     0.1      1.0      10.0           0   10   20  30   40   50  60   70  80
                                                             range table).
          Temperature                                        Testing methods, page 61                                                 Surface speed [m/s]                                Load [MPa]
          The ambient temperatures strongly influence the properties                                                                Diagram 01: Permissible pv values for iglidur  G plain bearing   Diagram 05: Coefficient of friction as a function of the
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          of plain bearings. The temperatures prevailing in the bearing                                                             with a wall thickness of 1mm dry operation against a steel   pressure, v = 0.01m/s
          system also have an influence on the wear. With increasing   Chemicals               Resistance                           shaft at +20°C, mounted in a steel housing.
          temperatures, the wear increases and this effect is significant   Alcohols            + up to 0
          when temperatures rise over +120°C. For temperatures   Diluted acids                  0 up to –                              120                                                 10
          over +80°C an additional securing is required.      Diluted alkalines                    +                                   100
          Application temperatures, page 53                   Fuels                                +                                                                                        8
          Additional securing, page 53                        Greases, oils without additives      +                                    80                                                  6
                                                              Hydrocarbons                         +                                    60                                                  4          Free cutting steel   Cf53, hard chromed  304 stainless steel
          Friction and wear                                   Strong acids                          –                                   40                                                        H.a. aluminium       HR carbon steel  High grade steel
          Similar to wear resistance, the coefficient of friction µ also   Strong alkalines        0                                    20                                              Wear [µm/km]  2     Cf53 steel
          changes with the surface speed and load (diagrams 04   All data given at room temperature [+20°C]                          Load [MPa]  0                                          0
          and 05).                                           Table 02: Chemical resistance                                                 20 30 40 50 60 70 80 90 100 110 120 130
          Coefficient of friction and surfaces, page 51      Chemical table, page 1170                                                Temperature [°C]
          Wear resistance, page 54                                                                                                  Diagram 02: Maximum recommended surface pressure as a   Diagram 06: Wear, rotating with different shaft materials,
                                                                               Rotating Oscillating   linear                        function of temperature (80MPa at +20°C)           pressure, p = 1MPa, v = 0.3m/s
          Shaft materials                                     Long-term  m/s      1.0       0.7        4.0
          The friction and wear are also dependent, to a large   Short-term  m/s  2.0       1.4        5.0                              10                                                 200
          degree, on the mating partner. Shafts that are too smooth   Table 03: Maximum surface speeds                                                                                     180        rotating
                                                                                                                                                                                                      oscillating
          increase both the coefficient of friction and the wear of the                                                                  8       +23°C                                     160
                                                                                                                                                                                           140
          bearing. For iglidur  G a ground surface with an average                 Dry    Greases Oil  Water                             6       +60°C                                     120
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          surface finish Ra = 0.8µm is recommended. Diagram 06   Coefficient of friction μ 0.08-0.15  0.09  0.04  0.04                   4                                                 100
                                                                                                                                                                                           80
          shows results of testing different shaft materials with plain   Table 04: Coefficient of friction against steel (Ra = 1μm,                                                       60
          bearings made from iglidur  G. It is important to notice that   50HRC)                                                     Deformation [%]  2                                 Wear [µm/km]  40
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                                                                                                                                                                                           20
          with increasing loads, the recommended hardness of the                                                                         0                                                  0
          shaft increases. The "soft" shafts tend to wear themselves      Housing   Plain bearings   Shaft                                 0         25       50       75       100            0   10   20  30   40   50  60   70  80
          and thus increase the wear of the overall system. If the   Ø d1 [mm]  H7 [mm]  E10 [mm]  h9 [mm]                            Load [MPa]                                         Load [MPa]
          loads exceed 2MPa it is important to recognise that the   0-3  +0.000 +0.010 +0.014 +0.054 -0.025 +0.000                  Diagram 03: Deformation under pressure and temperature  Diagram 07: Wear for oscillating and rotating applications
          wear rate (the gradient of the curves) clearly decreases with   > 3-6  +0.000 +0.012 +0.020 +0.068 -0.030 +0.000                                                             with shaft material Cf53 hardened and ground steel, as a
          the hard shaft materials. If the shaft material you plan on   > 6-10  +0.000 +0.015 +0.025 +0.083 -0.036 +0.000                                                              function of the load
          using is not shown in these test results, please contact us.  > 10-18  +0.000 +0.018 +0.032 +0.102 -0.043 +0.000              0.5
          Shaft materials, page 56                            > 18-30   +0.000 +0.021 +0.040 +0.124 -0.052 +0.000                       0.4
                                                              > 30-50   +0.000 +0.025 +0.050 +0.150 -0.062 +0.000
                                                              > 50-80   +0.000 +0.030 +0.060 +0.180 -0.074 +0.000                       0.3
                                                              > 80-120  +0.000 +0.035 +0.072 +0.212 -0.087 +0.000                    Coefficient of friction [µ]
                                                              > 120-180  +0.000 +0.040 +0.085 +0.245 -0.100 +0.000                      0.2
                                                             Table 05: Important tolerances for plain bearings according                0.1
                                                             to ISO 3547-1 after press-fit                                                 0.05  0.10   0.15  0.20  0.25  0.30  0.35

                                                                                                                                      Surface speed [m/s]
                                                                                                                 ASEAN 09/2023   ASEAN 09/2023  surface speed, p = 0.75MPa
                                                                                                                                    Diagram 04: Coefficient of friction as a function of the



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