Page 359 - IGUS Bearing
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iglidur  H370                                                                                                                                                                                                            iglidur  H370
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         +200°C                                                                                                                                                                                                                   +200°C
          75MPa                                                                                                                                                                                                                   75MPa
                      Bearing technology | Plain bearings | iglidur  H370                                                           Technical data
                                                                                                 ®
          Permissible surface speeds                          Chemicals                        Resistance                             100.0                                               0.25
          The maximum permitted surface speed is dependent on   Alcohols                           +                                   10.0                                               0.20
          whether the temperature at the bearing point becomes too   Diluted acids              + up to 0                                                                                 0.15
          high or not. iglidur  H370 is suitable for surface speeds   Diluted alkalines            +                                    1.0
                          ®
          of 1.2m/s (rotating) or 4m/s (linear). The maximum values   Fuels                        +                                                                                      0.10
          stated in table 03 are valid only with minimum pressure   Greases, oils without additives  +                               Surface pressure [MPa]  0.1                        Coefficient of friction [µ]  0.05
          loads and are often not attained in practice.       Hydrocarbons                         +
          Surface speed, page 48                              Strong acids                      + up to –                              0.01  0.001   0.01     0.1      1.0      10.0      0.00  0     15     30      45     60     75
                                                              Strong alkalines                     +
          Temperature                                                                                                                 Surface speed [m/s]                                Load [MPa]
          With increasing temperatures, the compressive strength of   All data given at room temperature [+20°C]                    Diagram 01: Permissible pv values for iglidur  H370 with a   Diagram 05: Coefficient of friction as a function of the
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          iglidur  H370 plain bearings decreases. The temperatures   Table 02: Chemical resistance                                  wall thickness of 1mm dry operation against a steel shaft at   pressure, v = 0.01m/s
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                                                             Chemical table, page 1170
          prevailing in the bearing system also have an influence on                                                                +20°C, mounted in a steel housing
          the wear. The wear rises with increasing temperatures.               Rotating Oscillating   linear
          For temperatures over +100°C an additional securing is   Long-term  m/s  1.2      0.8        4.0                              80                                                 8.0
          required.                                           Short-term  m/s     1.5       1.1        5.0                              70                                                 7.0
          Application temperatures, page 53                                                                                             60                                                 6.0
          Additional securing, page 53                       Table 03: Maximum surface speeds                                           50                                                 5.0
                                                                                                                                        40                                                 4.0
                                                                                   Dry    Greases Oil  Water                            30                                                 3.0         Free cutting steel   Cf53, hard chromed  HR carbon steel  304 stainless steel  High grade steel
          Friction and wear                                   Coefficient of friction μ 0.07-0.17  0.09  0.04  0.04                     20                                                 2.0    H.a. aluminium
          The coefficient of friction alters only little, like the wear   Table 04: Coefficient of friction against steel (Ra = 1μm,    10                                              Wear [µm/km]  1.0   Cf53 steel
          resistance with increasing load and surface speed (diagram                                                                 Load [MPa]  0                                         0.0
          04 and 05).                                        50HRC)                                                                        20      50     80     120     150    200
          Coefficient of friction and surfaces, page 51                   Housing   Plain bearings   Shaft                            Temperature [°C]
          Wear resistance, page 54                                                                                                  Diagram 02: Maximum recommended surface pressure as a   Diagram 06: Wear, rotating with different shaft materials,
                                                              Ø d1 [mm]   H7 [mm]     F10 [mm]     h9 [mm]
                                                                                                                                    function of temperature (75MPa at +20°C)           pressure, p = 1MPa, v = 0.3m/s
                                                              0-3       +0.000 +0.010 +0.006 +0.046 -0.025 +0.000
          Shaft materials                                     > 3-6     +0.000 +0.012 +0.010 +0.058 -0.030 +0.000
          Diagram 06 and 07 display a summary of the results of   > 6-10  +0.000 +0.015 +0.013 +0.071 -0.036 +0.000                      8                                                22.5
          tests with different shaft materials executed with plain   > 10-18  +0.000 +0.018 +0.016 +0.086 -0.043 +0.000                  7                                                20.0                            rotating
                                                                                                                                                                                                                          oscillating
          bearings made of iglidur  H370. For loads up to 2MPa   > 18-30  +0.000 +0.021 +0.020 +0.104 -0.052 +0.000                      6       +23°C                                    17.5
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                                                                                                                                                 +60°C
                                                                                                                                                                                          15.0
          in rotating applications, the hard-chromed shaft is the   > 30-50  +0.000 +0.025 +0.025 +0.125 -0.062 +0.000                   5                                                12.5
          best material for the iglidur  H370 plain bearings. The   > 50-80  +0.000 +0.030 +0.030 +0.150 -0.074 +0.000                   4                                                10.0
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                                                                                                                                         3
          high coefficient of wear with 304 stainless steel shafts,   > 80-120  +0.000 +0.035 -0.036 +0.176 -0.087 +0.000                2                                                 7.5
          which due to their extremely ground surfaces are prone   > 120-180  +0.000 +0.040 +0.043 +0.203 +0.000 +0.100              Deformation [%]  1                                 Wear [µm/km]  5.0
                                                                                                                                                                                           2.5
          to the stick-slip effect, is striking. Despite same values                                                                     0                                                 0.0
          in the lowest range, the HR carbon steel shaft shows   Table 05: Important tolerances for plain bearings according               0            25          50          75               Cf53     hard     304SS  HR carbon
          already better values than Cf53 with loads of 2MPa. On   to ISO 3547-1 after press-fit                                      Load [MPa]                                                         chromed             steel
          the other hand, the 304 stainless steel shaft shows a clear                                                               Diagram 03: Deformation under pressure and temperature  Diagram 07: Wear for rotating and oscillating applications
          advantage in pivoting movements.                                                                                                                                             with different shaft materials, p = 2MPa
          Shaft materials, page 56
                                                                                                                                        0.4
          Installation tolerances
          iglidur  H370 plain bearings are standard bearings for                                                                        0.3
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          shafts with h tolerance (recommended minimum h9).
          The bearings are designed for press-fit into a housing                                                                     Coefficient of friction [µ]  0.2
          machined to a H7 tolerance. After being assembled into a
          nominal size housing, in standard cases the inner diameter
          automatically adjusts to the F10 tolerances. For particular                                                                   0.1
                                                                                                                                           0.05
                                                                                                                                                 0.10
          dimensions the tolerance differs depending on the wall                                                                      Surface speed [m/s]  0.15  0.20  0.25  0.30  0.35
          thickness (please see product range table).
          Testing methods, page 61                                                                               ASEAN 09/2023   ASEAN 09/2023  Diagram 04: Coefficient of friction as a function of the
                                                                                                                                    surface speed, p = 0.75MPa

          356   3D-CAD, finder and service life calculation ... www.igus-asean.com/H370                                                                         Lubrication-free made easy ... from stock ... no minimum order quantity  357
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