Page 615 - IGUS Bearing
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iglidur  AB                                                                                                                                                                                                             iglidur  AB
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          +70°C                                                                                                                                                                                                                   +70°C
          25MPa                                                                                                                                                                                                                   25MPa
                      Bearing technology | Plain bearings | iglidur  AB                                                             Technical data
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          Permissible surface speeds                         Installation tolerances                                                  100.0                                                0.3
          iglidur  AB is mainly suitable for low surface speeds in   iglidur  AB plain bearings are standard bearings for              10.0
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          dry operation, but the specified values shown in table   shafts with h-tolerance (recommended minimum h9). The                                                                   0.2
          03 can only be achieved at very low pressures. At the   bearings are designed for press-fit into a housing machined           1.0
          given speeds, friction can cause a temperature increase   to a H7 tolerance. After being assembled into a nominal                                                                0.1
          to maximum permissible levels. In practice, though, this   size housing, the inner diameter automatically adjusts to       Surface pressure [MPa]  0.1                        Coefficient of friction [µ]
          level is rarely reached due to varying application conditions.  the E10 tolerances. In relation to the installation tolerance,
          Surface speed, page 48                             the inner diameter changes with the absorption of humidity.               0.01  0.001   0.01     0.1      1.0      10.0       0.0
                                                             For particular dimensions the tolerance differs depending                                                                         0     5     10    15    20    25    30
          Temperature                                        on the wall thickness (please see product range table).                  Surface speed [m/s]                                Load [MPa]
          The temperatures prevailing in the bearing system also have   Testing methods, page 61                                    Diagram 01: Permissible pv values for iglidur  AB plain   Diagram 05: Coefficient of friction as a function of the
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          an influence on the wear. With increasing temperatures,                                                                   bearing with a wall thickness of 1mm dry operation against    pressure, v = 0.01m/s
          the wear increases and this effect is significant when                                                                    a steel shaft at +20°C, mounted in a steel housing.
          temperatures rise over +60°C. For temperatures over   Chemicals                      Resistance
          +50°C an additional securing is required.           Alcohols                          + up to 0                               60                                                 0.5
          Application temperatures, page 53                   Diluted acids                     0 up to –                               50
          Additional securing, page 53                        Diluted alkalines                    +                                                                                       0.4
                                                              Fuels                                +                                    40                                                 0.3
          Friction and wear                                   Greases, oils without additives      +                                    30                                                 0.2         Free cutting steel   Cf53, hard chromed  304 stainless steel
          Coefficient of friction and wear resistance are dependent   Hydrocarbons                 +                                    20                                                        H.a. aluminium       HR carbon steel  High grade steel
          on the application parameters (diagrams 04 and 05).  Strong acids                         –                                   10                                              Wear [µm/km]  0.1   Cf53 steel
          Coefficient of friction and surfaces, page 51       Strong alkalines                     0                                 Load [MPa]  0                                         0.0
          Wear resistance, page 54                           All data given at room temperature [+20°C]                                    20      30     40     50      60     70
                                                             Table 02: Chemical resistance                                            Temperature [°C]
          Shaft materials                                    Chemical table, page 1170                                              Diagram 02: Maximum recommended surface pressure as a   Diagram 06: Wear, rotating with different shaft materials,
          The friction and wear are also dependent, to a large                                                                      function of temperature (25MPa at +20°C)           pressure, p = 1MPa, v = 0.3m/s
          degree, on the mating partner. Shafts that are too smooth            Rotating Oscillating   linear
          increase both the coefficient of friction and the wear of   Long-term  m/s  0.7   0.5        1.0                              14                                                 400
          the bearing. Diagram 06 shows results of testing different   Short-term  m/s  1.0  0.7       1.8                              12                                                 360        rotating
                                                                                                                                                                                                      oscillating
          shafts. When rotating at a load of 1MPa, the wear on   Table 03: Maximum surface speeds                                       10    +23°C                                        320
                                                                                                                                                                                           280
          all tested shafts is very similar. Only the hard-anodised                                                                      8    +60°C                                        240
          aluminium shafts cause a noticeable increase in the wear.                Dry    Greases Oil  Water                             6                                                 200
                                                                                                                                                                                           160
          As illustrated in diagram 07, the wear rate from pivoting   Coefficient of friction μ 0.18-0.31  0.09  0.04  0.04              4                                                 120
          and rotational movements at loads in increasing levels is   Table 04: Coefficient of friction against steel (Ra = 1μm,     Deformation [%]  2                                 Wear [µm/km]  80
                                                                                                                                                                                           40
          also quite similar if the remaining parameters are identical.  50HRC)                                                          0                                                  0
          Shaft materials, page 56                                                                                                         0         10       20       30       40             0      5      10      15     20     25
                                                                          Housing   Plain bearings   Shaft                            Load [MPa]                                         Load [MPa]
                                                              Ø d1 [mm]   H7 [mm]     E10 [mm]     h9 [mm]                          Diagram 03: Deformation under pressure and temperature  Diagram 07: Wear for oscillating and rotating applications
                                                              0-3       +0.000 +0.010 +0.014 +0.054 -0.025 +0.000                                                                      with shaft material Cf53 hardened and ground steel, as a
                                                              > 3-6     +0.000 +0.012 +0.020 +0.068 -0.030 +0.000                                                                      function of the load
                                                              > 6-10    +0.000 +0.015 +0.025 +0.083 -0.036 +0.000                       1.0
                                                              > 10-18   +0.000 +0.018 +0.032 +0.102 -0.043 +0.000                       0.8
                                                              > 18-30   +0.000 +0.021 +0.040 +0.124 -0.052 +0.000
                                                              > 30-50   +0.000 +0.025 +0.050 +0.150 -0.062 +0.000                       0.6
                                                              > 50-80   +0.000 +0.030 +0.060 +0.180 -0.074 +0.000                    Coefficient of friction [µ]  0.4
                                                              > 80-120  +0.000 +0.035 +0.072 +0.212 -0.087 +0.000                       0.2
                                                              > 120-180  +0.000 +0.040 +0.085 +0.245 -0.100 +0.000
                                                             Table 05: Important tolerances for plain bearings according                0.0  0.1  0.2  0.3  0.4  0.5  0.6  0.7  0.8  0.9
                                                             to ISO 3547-1 after press-fit                                            Surface speed [m/s]
                                                                                                                 ASEAN 09/2023   ASEAN 09/2023  Diagram 04: Coefficient of friction as a function of the

                                                                                                                                    surface speed, p = 1MPa

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