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iglidur  X6                                                                                                                                                                                                              iglidur  X6
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         +250°C                                                                                                                                                                                                                   +250°C
         150MPa                                                                                                                                                                                                                   150MPa
                      Bearing technology | Plain bearings | iglidur  X6                                                             Technical data
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          Permissible surface speeds                         Installation tolerances                                                  1,000                                               0.35
          The high temperature resistance and good thermal   iglidur  X6 plain bearings are standard bearings for                       100                                               0.30
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          conductivity values mean that iglidur  X6 is suitable for   shafts with h-tolerance (recommended minimum h9).                                                                   0.25
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          high-speed applications. At the given speeds, friction can   The bearings are designed for press-fit into a housing            10                                               0.20
          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]  1                        Coefficient of friction [µ]  0.10
          to varying application conditions.                 automatically adjusts to the F10 tolerances. For particular                                                                  0.05
          Surface speed, page 48                             dimensions the tolerance differs depending on the wall                     0.1  0.001   0.01     0.1      1.0      10.0      0.00
                                                             thickness (please see product range table). In relation to                                                                        0   10  20  30  40  50  60  70  80  90
          Temperature                                        the installation tolerance, the inner diameter changes with              Surface speed [m/s]                                Load [MPa]
          The ambient temperatures strongly influence the properties   the absorption of humidity.                                  Diagram 01: Permissible pv values for iglidur  X6 plain   Diagram 05: Coefficient of friction as a function of the
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          of plain bearings. With regard to temperature resistance,   Testing methods, page 61                                      bearing with a wall thickness of 1mm dry operation against    pressure, v = 0.01m/s
          iglidur  X6 is among the highest in the iglidur  range. In                                                                a steel shaft at +20°C, mounted in a steel housing
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          many tests it has shown a six times higher wear resistance
          compared to the established high-temperature specialist   Chemicals                  Resistance                              150                                                  7
          iglidur  X. For temperatures over +165°C an additional   Alcohols                        +                                   135                                                  6
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          securing is required.                               Diluted acids                        +                                   120                                                  5
                                                                                                                                       105
          Application temperatures, page 53                   Diluted alkalines                    +                                    90                                                  4
          Additional securing, page 53                        Fuels                                +                                    75                                                  3          Free cutting steel   Cf53, hard chromed  304 stainless steel
                                                                                                                                        60
                                                              Greases, oils without additives      +                                    45                                                  2     H.a. aluminium       HR carbon steel  High grade steel
          Friction and wear                                   Hydrocarbons                         +                                    30                                              Wear [µm/km]  1     Cf53 steel
                                                                                                                                        15
          Similar to wear resistance, the coefficient of friction μ also   Strong acids            +                                 Load [MPa]  0                                          0
          changes with the load. The coefficient of friction of iglidur  X6    Strong alkalines    +                                       20    50     80    120   150   200   250
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          declines with higher pressure and is practically constant for   All data given at room temperature [+20°C]                  Temperature [°C]
          pressures above 30MPa. A higher speed of the shaft also   Table 02: Chemical resistance                                   Diagram 02: Maximum recommended surface pressure as a   Diagram 06: Wear, rotating with different shaft materials,
          results in a lower coefficient of friction (diagram 04 and 05).  Chemical table, page 1170                                function of temperature (150MPa at +20°C)          pressure, p = 1MPa, v = 0.3m/s
          Coefficient of friction and surfaces, page 51
          Wear resistance, page 54                                             Rotating Oscillating   linear                            3.0                                                50
                                                              Long-term  m/s      1.5       1.1        5.0                              2.5                                                45         rotating
                                                                                                                                                                                                      oscillating
          Shaft materials                                     Short-term  m/s     3.5       2.5       10.0                              2.0      +23°C                                     40
                                                                                                                                                                                           35
          The friction and wear are also dependent, to a large   Table 03: Maximum surface speeds                                                +60°C                                     30
          degree, on the mating partner. Shafts that are too                                                                            1.5                                                25
                                                                                                                                                                                           20
          smooth increase both the coefficient of friction and                     Dry    Greases Oil  Water                            1.0                                                15
          the wear of the bearing. The best case for iglidur  X6   Coefficient of friction μ 0.09-0.25  0.09  0.04  0.04             Deformation [%]  0.5                               Wear [µm/km]  10
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          is a ground surface with an average surface finish Ra =   Table 04: Coefficient of friction against steel (Ra = 1μm,          0.0                                                 0
          0.4-0.7µm. Diagram 06 shows a summary of the results   50HRC)                                                                    0       30     60     90      120    150            0  1   2   3  4   5   6  7   8   9  10
          of tests with different shaft materials executed with plain                                                                 Load [MPa]                                         Load [MPa]
          bearings made of iglidur  X6. The best performance is           Housing   Plain bearings   Shaft                          Diagram 03: Deformation under pressure and temperature  Diagram 07: Wear for oscillating and rotating applications
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          achieved with the plain shaft materials free cutting steel   Ø d1 [mm]  H7 [mm]  F10 [mm]  h9 [mm]                                                                           with shaft material Cf53 hardened and ground steel, as a
          and plain steel 1.0037. At higher loads, we recommend   0-3   +0.000 +0.010 +0.006 +0.046 -0.025 +0.000                                                                      function of the load
          harder steel qualities. Non-hardened steel shafts can   > 3-6  +0.000 +0.012 +0.010 +0.058 -0.030 +0.000
          be worn by the bearing at pressures over 2MPa. The   > 6-10   +0.000 +0.015 +0.013 +0.071 -0.036 +0.000
          wear database shows that iglidur  X6 is more suitable   > 10-18  +0.000 +0.018 +0.016 +0.086 -0.043 +0.000
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          for rotating than for pivoting applications (diagram 07).    > 18-30  +0.000 +0.021 +0.020 +0.104 -0.052 +0.000
          If the shaft material you plan on using is not shown in these   > 30-50  +0.000 +0.025 +0.025 +0.125 -0.062 +0.000         Coefficient of friction [µ]
          test results, please contact us.                    > 50-80   +0.000 +0.030 +0.030 +0.150 -0.074 +0.000
          Shaft materials, page 56                            > 80-120  +0.000 +0.035 -0.036 +0.176 -0.087 +0.000
                                                              > 120-180  +0.000 +0.040 +0.043 +0.203 +0.000 +0.100
                                                             Table 05: Important tolerances for plain bearings according              Surface speed [m/s]
                                                                                                                 ASEAN 09/2023   ASEAN 09/2023  surface speed, p = 0.75MPa
                                                             to ISO 3547-1 after press-fit                                          Diagram 04: Coefficient of friction as a function of the



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