Page 107 - IGUS Bearing
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iglidur  G1                                                                                                                                                                                                              iglidur  G1
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         +180 °C                                                                                                                                                                                                                  +180 °C
          91MPa                                                                                                                                                                                                                   91MPa
                      Bearing technology | Plain bearings | iglidur  G1                                                             Technical data
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          Permissible surface speeds                         Installation tolerances                                                  100.0                                               0.35
          iglidur  G1 has been developed for low to medium surface   iglidur  G1 plain bearings are standard bearings for              10.0                                               0.30
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          speeds. The maximum values shown in table 03 can only   shafts with h-tolerance (recommended minimum h9).                                                                       0.25
          be achieved at low pressures. At the given speeds, friction   The bearings are designed for press-fit into a housing          1.0                                               0.20
          can cause a temperature increase to maximum permissible   machined to a H7 tolerance. After being assembled into a                                                              0.15
          levels. In practice, though, this level is rarely reached due   nominal size housing, in standard cases the inner diameter   Surface pressure [MPa]  0.1                      Coefficient of friction [µ]  0.10
          to varying application conditions.                 automatically adjusts to the F10 tolerances. For particular                                                                  0.05
                                                                                                                                                                                          0.00
          Surface speed, page 48                             dimensions the tolerance differs depending on the wall                    0.01  0.001   0.01     0.1      1.0      10.0           0   10   20  30   40   50  60   70  80
                                                             thickness (please see product 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                                                                     with a wall thickness of 1mm dry operation against a steel   pressure, v = 0.01m/s
          bearing system also have an influence on the wear. With   Chemicals                  Resistance                           shaft at +20°C, mounted in a steel housing.
          increasing temperatures, the wear increases and this effect   Alcohols                + up to 0
          is significant when temperatures rise over +120°C. For   Diluted acids                0 up to –                              100                                                  6
          temperatures over 120°C an additional securing of the   Diluted alkalines                +                                                                                        5
          bearings in the housing is required.                Fuels                                +                                    80
          Application temperatures, page 53                   Greases, oils without additives      +                                    60                                                  4
          Additional securing, page 53                        Hydrocarbons                         +                                    40                                                  3          Free cutting steel   Cf53, hard chromed  304 stainless steel
                                                              Strong acids                          –                                                                                       2     H.a. aluminium       HR carbon steel  High grade steel
          Friction and wear                                   Strong alkalines                     0                                    20                                              Wear [µm/km]  1     Cf53 steel
          The coefficient of friction μ of a plain bearing among other   All data given at room temperature [+20°C]                  Load [MPa]  0                                          0
          factors is influenced by the surface speed and the load   Table 02: Chemical resistance                                          20   40   60  80   100  120  140  160  180
          (diagrams 04 and 05).                              Chemical table, page 1170                                                Temperature [°C]
          Coefficient of friction and surfaces, page 51                                                                             Diagram 02: Maximum recommended surface pressure as a   Diagram 06: Wear, rotating with different shaft materials,
          Wear resistance, page 54                                             Rotating Oscillating   linear                        function of temperature (91MPa at +20°C)           pressure, p = 1MPa, v = 0.3m/s
                                                              Long-term  m/s      1.3       1.0        5.0
          Shaft materials                                     Short-term  m/s     2.5       1.8        6.0                              10                                                 200
          The friction and wear are also dependent, to a large   Table 03: Maximum surface speeds                                                                                          180        rotating
                                                                                                                                                                                                      oscillating
          degree, on the mating partner. Shafts that are too smooth                                                                      8       +23°C                                     160
                                                                                                                                                                                           140
          increase both the coefficient of friction and the wear of the            Dry    Greases Oil  Water                             6       +60°C                                     120
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          bearing. For iglidur  G1 a ground surface with an average   Coefficient of friction μ 0.10-0.29  0.09  0.04  0.04              4                                                 100
                                                                                                                                                                                           80
          surface finish Ra = 0.8µm is recommended. Diagram 06   Table 04: Coefficient of friction against steel (Ra = 1μm,                                                                60
          shows results of testing different shaft materials with plain   50HRC)                                                     Deformation [%]  2                                 Wear [µm/km]  40
                                                                                                                                                                                           20
          bearings made from iglidur  G1. It can be observed that                                                                        0                                                  0
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          iglidur  G1 achieves good to very good wear results with        Housing   Plain bearings   Shaft                                 0         25       50       75       100            0   10   20  30   40   50  60   70  80
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          all shaft materials. The results for stainless steel types are   Ø d1 [mm]  H7 [mm]  F10 [mm]  h9 [mm]                      Load [MPa]                                         Load [MPa]
          most likely slightly lower. Diagram 07 compares the wear   0-3  +0.000 +0.010 +0.006 +0.046 -0.025 +0.000                 Diagram 03: Deformation under pressure and temperature  Diagram 07: Wear for oscillating and rotating applications
          in rotating and pivoting applications. As with many of the   > 3-6  +0.000 +0.012 +0.010 +0.058 -0.030 +0.000                                                                with shaft material Cf53 hardened and ground steel, as a
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          iglidur  materials, wear rate is better in pivoting applications.  > 6-10  +0.000 +0.015 +0.013 +0.071 -0.036 +0.000                                                         function of the load
          Shaft materials, page 56                            > 10-18   +0.000 +0.018 +0.016 +0.086 -0.043 +0.000                       0.4
                                                              > 18-30   +0.000 +0.021 +0.020 +0.104 -0.052 +0.000                       0.3
                                                              > 30-50   +0.000 +0.025 +0.025 +0.125 -0.062 +0.000
                                                              > 50-80   +0.000 +0.030 +0.030 +0.150 -0.074 +0.000                       0.2
                                                              > 80-120  +0.000 +0.035 -0.036 +0.176 -0.087 +0.000                    Coefficient of friction [µ]
                                                              > 120-180  +0.000 +0.040 +0.043 +0.203 +0.000 +0.100                      0.1
                                                             Table 05: Important tolerances for plain bearings according                0.0
                                                             to ISO 3547-1 after press-fit                                                 0.1   0.5    0.7   1.0   1.2   1.5   2.0

                                                                                                                                      Surface speed [m/s]
                                                                                                                 ASEAN 09/2023   ASEAN 09/2023  surface speed, p = 1MPa
                                                                                                                                    Diagram 04: Coefficient of friction as a function of the



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