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iglidur  GLW                                                                                                                                                                                                             iglidur  GLW
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         +100°C                                                                                                                                                                                                                   +100°C
          80MPa                                                                                                                                                                                                                   80MPa
                      Bearing technology | Plain bearings | iglidur  GLW                                                            Technical data
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          Permissible surface speeds                         Product range                                                            100.0
          iglidur  GLW has been developed for low to medium   iglidur  GLW plain bearings are manufactured to special order.           10.0
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          surface speeds. During continuous operation, a maximum   For high volume applications, please request iglidur  GLW
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          speed of 0.8m/s (rotating) or 2.5m/s (linear) is permissible.    plain bearings as an alternative to iglidur  G.              1.0
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          The maximum values shown in table 03 can only be
          achieved at low pressures. In practice, these values                                                                       Surface pressure [MPa]  0.1                        Coefficient of friction [µ]
          are rarely reached, due to the increasing temperatures    Chemicals                  Resistance
          approaching or exceeding the maximum permitted value.  Alcohols                       + up to 0                              0.01  0.001   0.01     0.1      1.0      10.0
          Surface speed, page 48                              Diluted acids                     0 up to –
                                                              Diluted alkalines                    +                                  Surface speed [m/s]                                Load [MPa]
          Temperature                                         Fuels                                +                                Diagram 01: Permissible pv values for iglidur  GLW with a   Diagram 05: Coefficient of friction as a function of the
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          The ambient temperatures strongly influence the properties    Greases, oils without additives  +                          wall thickness of 1mm dry operation against a steel shaft at   pressure, v = 0.01m/s
          of plain bearings. Diagram 02 shows this inverse    Hydrocarbons                         +                                +20°C, mounted in a steel housing
          relationship. The wear rises with increasing temperatures.   Strong acids                 –
          For temperatures over +80°C an additional securing is   Strong alkalines                 0                                   120                                                 100
          required.                                          All data given at room temperature [+20°C]                                100                                                 30
          Application temperatures, page 53                  Table 02: Chemical resistance                                                                                                 25
          Additional securing, page 53                       Chemical table, page 1170                                                  80                                                 20
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                                                                                                                                                                                           15          Free cutting steel   Cf53, hard chromed  304 stainless steel
          Friction and wear                                                    Rotating Oscillating   linear                            40                                                 10     H.a. aluminium       HR carbon steel  High grade steel
          Similar to wear resistance, the coefficient of friction µ also   Long-term  m/s  0.8  0.6    2.5                              20                                              Wear [µm/km]  5     Cf53 steel
          changes with the surface speed and load (diagrams 04   Short-term  m/s  1.0       0.7        3.0                           Load [MPa]  0                                          0
          and 05).                                           Table 03: Maximum surface speeds                                              20   30   40  50   60  70   80   90  100
          Coefficient of friction and surfaces, page 51                                                                               Temperature [°C]
          Wear resistance, page 54                                                 Dry    Greases Oil  Water                        Diagram 02: Maximum recommended surface pressure as a   Diagram 06: Wear, rotating with different shaft materials,
                                                              Coefficient of friction μ 0.10-0.24  0.09  0.04  0.04                 function of temperature (80MPa at +20°C)           pressure, p = 1MPa, v = 0.3m/s
          Shaft materials                                    Table 04: Coefficient of friction against steel (Ra = 1μm,
          The friction and wear are also dependent, to a large   50HRC)                                                                 10
          degree, on the mating partner. Shafts that are too smooth
          increase both the coefficient of friction and the wear of the      Housing  Plain bearings  Shaft                              8       +23°C
          bearing. For iglidur  GLW a ground surface with an average   Ø d1 [mm]  H7 [mm]  E10 [mm]  h9 [mm]                             6       +60°C
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          surface finish Ra = 0.1-0.2µm is recommended. Diagram   0-3   +0.000 +0.010 +0.014 +0.054 -0.025 +0.000                        4
          06 shows results of testing different shaft materials with   > 3-6  +0.000 +0.012 +0.020 +0.068 -0.030 +0.000
          plain bearings made from iglidur  GLW. If the shaft material   > 6-10  +0.000 +0.015 +0.025 +0.083 -0.036 +0.000           Deformation [%]  2
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          you plan on using is not shown in these test results, please   > 10-18  +0.000 +0.018 +0.032 +0.102 -0.043 +0.000              0
          contact us.                                         > 18-30   +0.000 +0.021 +0.040 +0.124 -0.052 +0.000                          0    10   20  30   40  50   60   70  80
          Shaft materials, page 56                            > 30-50   +0.000 +0.025 +0.050 +0.150 -0.062 +0.000                     Load [MPa]
                                                              > 50-80   +0.000 +0.030 +0.060 +0.180 -0.074 +0.000                   Diagram 03: Deformation under pressure and temperature
          Installation tolerances                             > 80-120  +0.000 +0.035 +0.072 +0.212 -0.087 +0.000
          iglidur  GLW plain bearings are standard bearings for   > 120-180  +0.000 +0.040 +0.085 +0.245 -0.100 +0.000
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          shafts with h-tolerance (recommended minimum h9). The   Table 05: Important tolerances for plain bearings according          0.35
          bearings are designed for press-fit into a housing machined   to ISO 3547-1 after press-fit                                  0.30
          to a H7 tolerance. After being assembled into a nominal
          size housing, the inner diameter automatically adjusts to                                                                    0.25
          the E10 tolerances. For particular dimensions the tolerance                                                                Coefficient of friction [µ]
          differs depending on the wall thickness (please see product                                                                  0.20
          range table).
          Testing methods, page 61                                                                                                     0.15  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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