Page 598 - IGUS Bearing
P. 598

iglidur  G V0                                                                                                                                                                                                            iglidur  G V0
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         +130°C                                                                                                                                                                                                                   +130°C
          75MPa                                                                                                                                                                                                                   75MPa
                      Bearing technology | Plain bearings | iglidur  G V0                                                           Technical data
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          Temperature                                        Installation tolerances                                                  100.0                                               0.35
          The ambient temperatures strongly influence the properties    iglidur  G V0 plain bearings are standard bearings for         10.0                                               0.30
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          of plain bearings. The short-term maximum temperature    shafts with h-tolerance (recommended minimum h9). The                                                                  0.25
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          permitted is +210°C and allows the use of iglidur  G V0   bearings are designed for press-fit into a housing machined         1.0                                               0.20
          plain bearings in applications where the bearings are not   to a H7 tolerance. After being assembled into a nominal                                                             0.15
          subjected to any additional load such as a paint drying   size housing, the inner diameter automatically adjusts to        Surface pressure [MPa]  0.1                        Coefficient of friction [µ]  0.10
          process. The temperatures prevailing in the bearing   the E10 tolerances.                                                                                                       0.05
          system also have an influence on the wear. With increasing    Testing methods, page 61                                       0.01  0.001   0.01     0.1      1.0      10.0      0.00  0  10   20  30   40   50  60   70  80
          temperatures, the wear increases and this effect is significant
          when temperatures rise over +120°C. For temperatures                                                                        Surface speed [m/s]                                Load [MPa]
          over +100°C an additional securing is required.     Chemicals                        Resistance                           Diagram 01: Permissible pv values for iglidur  G V0 plain   Diagram 05: Coefficient of friction as a function of the
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          Application temperatures, page 53                   Alcohols                          + up to 0                           bearing with a wall thickness of 1 mm dry operation against    pressure, v = 0.01m/s
          Additional securing, page 53                        Diluted acids                     0 up to –                           a steel shaft at +20°C, mounted in a steel housing.
                                                              Diluted alkalines                    +
          Friction and wear                                   Fuels                                +                                   120                                                  9
          Similar to wear resistance, the coefficient of friction μ   Greases, oils without additives  +                               100                                                  8
          also changes with the load. The coefficient of friction   Hydrocarbons                   +                                                                                        7
                                                                                                                                                                                            6
          decreases considerably with increasing loads, whereas a   Strong acids                    –                                   80                                                  5
          slight increase in surface speed causes an increase of the   Strong alkalines            0                                    60                                                  4          Free cutting steel   Cf53, hard chromed  304 stainless steel
          coefficient of friction. This relationship explains the excellent   All data given at room temperature [+20°C]                40                                                  3     H.a. aluminium       HR carbon steel  High grade steel
          results of iglidur  G V0 plain bearings for high loads and   Table 02: Chemical resistance                                    20                                              Wear [µm/km]  2     Cf53 steel
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          low speeds (diagrams 04 and 05).                   Chemical table, page 1170                                               Load [MPa]  0                                          0
          Coefficient of friction and surfaces, page 51                                                                                    20 30 40 50 60 70 80 90 100 110 120 130
          Wear resistance, page 54                                             Rotating Oscillating   linear                          Temperature [°C]
                                                              Long-term  m/s      1.0       0.7        4.0                          Diagram 02: Maximum recommended surface pressure as a   Diagram 06: Wear, rotating with different shaft materials,
          Shaft materials                                     Short-term  m/s     2.0       1.4        5.0                          function of temperature (75MPa at +20°C)           pressure, p = 1MPa, v = 0.3m/s
          The friction and wear are also dependent, to a large   Table 03: Maximum surface speeds
          degree, on the mating partner. Shafts that are too smooth                                                                     10                                                 200
          increase both the coefficient of friction and the wear of the            Dry    Greases Oil  Water                                                                               180        rotating
                                                                                                                                                                                                      oscillating
          bearing. For iglidur  G V0 a ground surface with an average   Coefficient of friction μ 0.07-0.20  0.09  0.04  0.04            8       +23°C                                     160
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                                                                                                                                                                                           140
          surface finish Ra = 0.6-0.8µm is recommended. Diagram   Table 04: Coefficient of friction against steel (Ra = 1μm,             6       +60°C                                     120
          06 shows results of testing different shaft materials with   50HRC)                                                            4                                                 100
                                                                                                                                                                                           80
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          plain bearings made from iglidur  G V0. It is important                                                                                                                          60
          to notice that with increasing loads, the recommended           Housing   Plain bearings   Shaft                           Deformation [%]  2                                 Wear [µm/km]  40
                                                                                                                                                                                           20
          hardness of the shaft increases. The "soft" shafts tend   Ø d1 [mm]  H7 [mm]  E10 [mm]   h9 [mm]                               0                                                  0
          to wear themselves and thus increase the wear of the   0-3    +0.000 +0.010 +0.014 +0.054 -0.025 +0.000                          0         25       50       75       100            0   5   10  15  20  25  30  35  40  45
          overall system. If the loads exceed 2MPa it is important to   > 3-6  +0.000 +0.012 +0.020 +0.068 -0.030 +0.000              Load [MPa]                                         Load [MPa]
          recognise that the wear rate (the gradient of the curves)   > 6-10  +0.000 +0.015 +0.025 +0.083 -0.036 +0.000             Diagram 03: Deformation under pressure and temperature  Diagram 07: Wear for oscillating and rotating applications
          clearly decreases with the hard shaft materials. The   > 10-18  +0.000 +0.018 +0.032 +0.102 -0.043 +0.000                                                                    with shaft material Cf53 hardened and ground steel, as a
          comparison of rotation and pivoting shows that iglidur  G   > 18-30  +0.000 +0.021 +0.040 +0.124 -0.052 +0.000                                                               function of the load
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          V0 provides advantages in pivoting movements (diagram   > 30-50  +0.000 +0.025 +0.050 +0.150 -0.062 +0.000                    0.5
          07).  If the shaft material you plan on using is not shown   > 50-80  +0.000 +0.030 +0.060 +0.180 -0.074 +0.000               0.4
                                                                                                                                     Coefficient of friction [µ]
          in these test results, please contact us.           > 80-120  +0.000 +0.035 +0.072 +0.212 -0.087 +0.000                       0.3
          Shaft materials, page 56                            > 120-180  +0.000 +0.040 +0.085 +0.245 -0.100 +0.000
                                                             Table 05: Important tolerances for plain bearings according                0.2
                                                             to ISO 3547-1 after press-fit                                              0.1

                                                                                                                                        0.0
                                                                                                                                           0.10 0.15 0.20 0.25 0.30 0.35 0.40 0.45 0.50
                                                                                                                                      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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