Page 504 - IGUS Bearing
P. 504

iglidur  Q290                                                                                                                                                                                                            iglidur  Q290
            ®
                                                                                                                                                                                                                                    ®
         +140°C                                                                                                                                                                                                                   +140°C
          55MPa                                                                                                                                                                                                                   55MPa
                      Bearing technology | Plain bearings | iglidur  Q290                                                           Technical data
                                                                                                 ®
          Permissible surface speeds                          Chemicals                        Resistance                             100.0                                               0.20
          Typical  applications  for  iglidur   Q290  plain  bearings   Alcohols                + up to 0                              10.0                                               0.15
                                     ®
          are pivoting movements under medium to high loads   Diluted acids                     0 up to –
          at comparatively low speeds. However, relatively high   Diluted alkalines                +                                    1.0                                               0.10
          speeds are still attainable. The speeds shown in table 03   Fuels                        +
          are threshold values for low bearing loads. They do not   Greases, oils without additives  +                               Surface pressure [MPa]  0.1                        Coefficient of friction [µ]  0.05
          provide any indication of the wear resistance under these   Hydrocarbons                 +
          parameters.                                         Strong acids                          –                                  0.01  0.001   0.01     0.1      1.0      10.0      0.00
          Surface speed, page 48                              Strong alkalines                  + up to 0                                                                                      1        10       25       40       55
                                                                                                                                      Surface speed [m/s]                                Load [MPa]
                                                             All data given at room temperature [+20°C]
          Temperature                                                                                                               Diagram 01: Permissible pv values for iglidur  Q290 with a   Diagram 05: Coefficient of friction as a function of the load,
                                                                                                                                                                      ®
          The long-term upper temperature limit of +140°C permits   Table 02: Chemical resistance                                   wall thickness of 1mm dry operation against a steel shaft at   v = 0.01m/s against Cf53
                                                             Chemical table, page 1170
          the broad use in applications typical for the agricultural,                                                               +20°C, mounted in a steel housing
          utility vehicle or construction equipment sectors. For               Rotating Oscillating   linear                            80                                                16.0
          temperatures  over  +80°C  an  additional  securing  is   Long-term  m/s  0.8     0.6        1.0                              70                                                14.0
          required.                                           Short-term  m/s     2.0       1.4        2.0                              60                                                12.0
          Application temperatures, page 53                                                                                             50                                                10.0
          Additional securing, page 53                       Table 03: Maximum surface speeds                                           40                                                 8.0                    Cf53, hard chromed
                                                                                                                                        30                                                 6.0    H.a. aluminium  Free cutting steel   HR carbon steel  304 stainless steel  High grade steel
                                                                                   Dry    Greases Oil  Water                            20                                                 4.0              Cf53 steel
          Friction and wear                                   Coefficient of friction μ 0.14-0.26  0.09  0.04  0.04                     10                                              Wear [µm/km]  2.0
          Please note that a sliding surface with a rough surface   Table 04: Coefficient of friction against steel (Ra = 1μm,       Load [MPa]  0                                         0.0
          finish will increase the friction. The coefficient of friction of                                                                20    40     60    80    100   120   140
          iglidur  Q290 increases as the speed increases (diagram   50HRC)                                                            Temperature [°C]
               ®
          04). In contrast, the coefficient of friction drops continually      Housing  Plain bearings  Shaft                       Diagram 02: Maximum recommended surface pressure as a   Diagram 06: Wear, rotating with different shaft materials,
          with the radial load, as illustrated by diagram 05.  Ø d1 [mm]  H7 [mm]     E10 [mm]     h9 [mm]                          function of temperature (55MPa at +20°C)           pressure, p = 1MPa, v = 0.3m/s
          Coefficient of friction and surfaces, page 51       0-3       +0.000 +0.010 +0.014 +0.054 -0.025 +0.000
          Wear resistance, page 54                                                                                                      25                                                 240
                                                              > 3-6     +0.000 +0.012 +0.020 +0.068 -0.030 +0.000                                                                                     rotating
                                                                                                                                        20                                                 200        oscillating
                                                              > 6-10    +0.000 +0.015 +0.025 +0.083 -0.036 +0.000
          Shaft materials                                     > 10-18   +0.000 +0.018 +0.032 +0.102 -0.043 +0.000                       15       +23°C                                     160
                                                                                                                                                 +60°C
          Generally, the use of hardened shafts is recommended   > 18-30  +0.000 +0.021 +0.040 +0.124 -0.052 +0.000                                                                        120
          for higher loads starting at approximately 10MPa. This   > 30-50  +0.000 +0.025 +0.050 +0.150 -0.062 +0.000                   10                                                 80
          is, however, often not the case in practice, especially in   > 50-80  +0.000 +0.030 +0.060 +0.180 -0.074 +0.000                5                                                 40
          connection with corrosion-resistant coating methods.   > 80-120  +0.000 +0.035 +0.072 +0.212 -0.087 +0.000                 Deformation [%]                                    Wear [µm/km]
          Thus, the iglidur  Q290 material has a lot of importance   > 120-180  +0.000 +0.040 +0.085 +0.245 -0.100 +0.000                0                                                  0
                        ®
                                                                                                                                                                                               0
                                                                                                                                           0
          in such applications. Diagram 08 shows this very clearly in                                                                 Load [MPa]     15       30       45       60       Load [MPa]  5     15    25    35    45    55
          connection with galvanised shafts. The special suitability   Table 05: Important tolerances for plain bearings according
          for pivoting applications is shown in diagram 07.  to ISO 3547-1 after press-fit                                          Diagram 03: Deformation under pressure and temperature  Diagram 07: Wear for oscillating and rotating applications
          Shaft materials, page 56                                                                                                                                                     with shaft material Cf53 hardened and ground steel, as a
                                                                                                                                                                                       function of the load
          Installation tolerances                                                                                                      0.50                                                                                 Failed*
          iglidur  Q290 plain bearings are standard bearings for                                                                       0.40
               ®
          shafts with h tolerance (recommended minimum h9). The                                                                        0.30
          bearings are designed for press-fit into a housing machined
          to a H7 tolerance. After being assembled into a nominal                                                                    Coefficient of friction [µ]  0.20
          size housing, the inner diameter automatically adjusts to                                                                    0.10                                             Wear rate [µm/km]
          the E10 tolerances. For particular dimensions the tolerance
          differs depending on the wall thickness (please see product                                                                  0.00                                                    iglidur  Q290  iglidur  Z  Rolled metallic bearing
                                                                                                                                                                                                   ®
                                                                                                                                                                                                                  ®
          range table).                                                                                                                    0.0   0.1  0.2  0.3  0.4   0.5  0.6  0.7                                      with sliding layer
                                                                                                                                      Surface speed [m/s]
          Testing methods, page 61                                                                                                  Diagram 04: Coefficient of friction as a function of the surface   Diagram 08: Wear, pivoting applications on galvanised shafts,
                                                                                                                 ASEAN 09/2023   ASEAN 09/2023  speed, p = 1MPa                        * Shaft St52 galvanised. Cycle frequency 60,000. Tested with bearing diameter
                                                                                                                                                                                       p >50MPa, v = 0.01m/s
                                                                                                                                                                                       20mm and 20mm length. The force in the test was 30,400N

          502   3D-CAD, finder and service life calculation ... www.igus-asean.com/Q290                                                                         Lubrication-free made easy ... from stock ... no minimum order quantity  503
   499   500   501   502   503   504   505   506   507   508   509