Page 368 - IGUS Bearing
P. 368

iglidur  H                                                                                                                                                                                                              iglidur  H
             ®
                                                                                                                                                                                                                                      ®
         +200°C                                                                                                                                                                                                                   +200°C
         90 MPa                                                                                                                                                                                                                   90 MPa
                      Bearing technology | Plain bearings | iglidur  H                                                              Technical data
                                                                                                    ®
          Permissible surface speeds                         Installation tolerances                                                  100.0                                               0.20
          The maximum permitted surface speed is dependent on   iglidur  H plain bearings are standard bearings for                    10.0                                               0.15
                                                                   ®
          whether the temperature at the bearing point becomes   shafts with h-tolerance (recommended minimum h9).
          too high or not. iglidur  H is suitable for maximum surface   The bearings are designed for press-fit into a housing          1.0                                               0.10
                            ®
          speeds of 1.0m/s (rotating) and 3.0m/s (linear) in dry   machined to a H7 tolerance. After being assembled into a
          operation. Linear movements enable higher surface   nominal size housing, in standard cases the inner diameter             Surface pressure [MPa]  0.1                        Coefficient of friction [µ]  0.05
          speeds, as a large area of the shaft contributes to the   automatically adjusts to the F10 tolerances. For particular
          cooling.                                           dimensions the tolerance differs depending on the wall                    0.01  0.001   0.01     0.1      1.0      10.0      0.00
          Surface speed, page 48                             thickness (please see product range table).                                                                                       0   10   20  30   40   50  60   70  80
                                                             Testing methods, page 61                                                 Surface speed [m/s]                                Load [MPa]
          Temperature                                                                                                               Diagram 01: Permissible pv values for iglidur  H plain bearing   Diagram 05: Coefficient of friction as a function of the
                                                                                                                                                                      ®
          With increasing temperatures, the compressive strength                                                                    with a wall thickness of 1mm dry operation against a steel   pressure, v = 0.01m/s
          of iglidur  H plain bearings decreases. Diagram 02 shows   Chemicals                 Resistance                           shaft at +20°C, mounted in a steel housing.
                 ®
          this inverse relationship. The temperatures prevailing in   Alcohols                     +
          the bearing system also have an influence on the wear.   Diluted acids                + up to 0                              160                                                 18
          For temperatures over +120°C an additional securing is   Diluted alkalines               +                                   140                                                 15
          required.                                           Fuels                                +                                   120
          Application temperatures, page 53                   Greases, oils without additives      +                                   100                                                 12
          Additional securing, page 53                        Hydrocarbons                         +                                    80                                                  9          Free cutting steel   Cf53, hard chromed  304 stainless steel
                                                              Strong acids                      + up to –                               60                                                  6     H.a. aluminium       HR carbon steel  High grade steel
                                                                                                                                        40
          Friction and wear                                   Strong alkalines                     +                                    20                                              Wear [µm/km]  3     Cf53 steel
          Both the wear resistance and the coefficient of friction   All data given at room temperature [+20°C]                      Load [MPa]  0                                          0
          change depending on the load. Interestingly, the coefficient   Table 02: Chemical resistance                                     20      30     40     50      120    130
          of friction µ lowers slightly with the increase of surface   Chemical table, page 1170                                      Temperature [°C]
          speed at constant load (see diagram 04 and 05).                                                                           Diagram 02: Maximum recommended surface pressure as a   Diagram 06: Wear, rotating with different shaft materials,
          Coefficient of friction and surfaces, page 51                        Rotating Oscillating   linear                        function of temperature (90MPa at +20°C)           pressure, p = 1MPa, v = 0.3m/s
          Wear resistance, page 54                            Long-term  m/s      1.0       0.7        3.0
                                                              Short-term  m/s     1.5       1.1        4.0                              3.5                                                45
          Shaft materials                                    Table 03: Maximum surface speeds                                           3.0                                                40                            rotating
                                                                                                                                                                                                                         oscillating
          Diagram 06 and 07 display a summary of the results of                                                                         2.5      +23°C                                     35
                                                                                                                                                                                           30
          tests with different shaft materials executed with plain                 Dry    Greases Oil  Water                            2.0      +60°C                                     25
                                           ®
          bearings made of iglidur  H. The iglidur  H plain bearings   Coefficient of friction μ 0.07-0.20  0.09  0.04  0.04            1.5                                                20
                              ®
          give different results when used in rotating and pivoting   Table 04: Coefficient of friction against steel (Ra = 1μm,        1.0                                                15
          applications on different shaft materials. The Cf53 and HR   50HRC)                                                        Deformation [%]  0.5                               Wear [µm/km]  10
                                                                                                                                                                                            5
          carbon steel shafts give the best wear values in rotating                                                                     0.0                                                 0
          applications, whereas the 304 stainless steel shafts (which      Housing  Plain bearings   Shaft                                 0         25       50       75       100              Cf53     hard     304SS  HR carbon
          are not so good for rotation) give the best results in pivoting   Ø d1 [mm]  H7 [mm]  F10 [mm]  h9 [mm]                     Load [MPa]                                                         chromed             steel
          applications. Hard-chromed shafts only give an advantage   0-3  +0.000 +0.010 +0.006 +0.046 -0.025 +0.000                 Diagram 03: Deformation under pressure and temperature  Diagram 07: Wear for rotating and oscillating applications
                                           ®
          at low pressures when used with iglidur  H bearings.  > 3-6   +0.000 +0.012 +0.010 +0.058 -0.030 +0.000                                                                      with different shaft materials, p = 2MPa
          Shaft materials, page 56                            > 6-10    +0.000 +0.015 +0.013 +0.071 -0.036 +0.000
                                                              > 10-18   +0.000 +0.018 +0.016 +0.086 -0.043 +0.000                       0.4
                                                              > 18-30   +0.000 +0.021 +0.020 +0.104 -0.052 +0.000
                                                              > 30-50   +0.000 +0.025 +0.025 +0.125 -0.062 +0.000                       0.3
                                                              > 50-80   +0.000 +0.030 +0.030 +0.150 -0.074 +0.000
                                                              > 80-120  +0.000 +0.035 -0.036 +0.176 -0.087 +0.000                    Coefficient of friction [µ]  0.2
                                                              > 120-180  +0.000 +0.040 +0.043 +0.203 +0.000 +0.100
                                                             Table 05: Important tolerances for plain bearings according                0.1
                                                             to ISO 3547-1 after press-fit                                                 0.05  0.10  0.15  0.20  0.25  0.30  0.35  0.40

                                                                                                                                      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



          366   3D-CAD, finder and service life calculation ... www.igus-asean.com/H                                                                            Lubrication-free made easy ... from stock ... no minimum order quantity  367
   363   364   365   366   367   368   369   370   371   372   373