Page 180 - IGUS Bearing
P. 180

iglidur  W300                                                                                                                                                                                                           iglidur  W300
            ®
                                                                                                                                                                                                                                    ®
          +90°C                                                                                                                                                                                                                   +90°C
          60MPa                                                                                                                                                                                                                   60MPa
                      Bearing technology | Plain bearings | iglidur  W300                                                           Technical data
                                                                                                ®
          Permissible surface speeds                         Installation tolerances                                                  100.0                                               0.30
          Even at higher surface speeds, the coefficient of friction of   iglidur  W300 plain bearings are standard bearings for       10.0                                               0.25
                                                                  ®
          iglidur  W300 plain bearings do not increase. In relation   shafts with h-tolerance (recommended minimum h9). The                                                               0.20
               ®
          to other materials, therefore, somewhat higher surface   bearings are designed for press-fit into a housing machined          1.0                                               0.15
          speeds can be attained, for example, up to 1.5m/s   to a H7 tolerance. After being assembled into a nominal                                                                     0.10
          rotating and up to 6m/s linear. The wear remains low when   size housing, the inner diameter automatically adjusts to      Surface pressure [MPa]  0.1                        Coefficient of friction [µ]  0.05
          used for long periods at high speeds, due to exceptional   the E10 tolerances. For particular dimensions the tolerance
          wear resistance. Very high speeds can be attained with   differs depending on the wall thickness (please see product         0.01  0.001   0.01     0.1      1.0      10.0      0.00
          iglidur  W300 bearings on hardened shafts that are not   range table).                                                                                                               0     10    20    30    40    50    60
               ®
          too smooth.                                        Testing methods, page 61                                                 Surface speed [m/s]                                Load [MPa]
          Surface speed, page 48                                                                                                    Diagram 01: Permissible pv values for iglidur  W300 with a   Diagram 05: Coefficient of friction as a function of the
                                                                                                                                                                      ®
                                                                                                                                    wall thickness of 1mm dry operation against a steel shaft at   pressure, v = 0.01m/s
          Temperature                                         Chemicals                        Resistance                           +20°C, mounted in a steel housing
          iglidur  W300 bearings retain their exceptional wear   Alcohols                       + up to 0
               ®
          resistance even up to the highest permissible application    Diluted acids            0 up to –                              120                                                 1.6
          temperatures and at the same time resist becoming brittle   Diluted alkalines            +                                   100                                                 1.4
          at low temperatures. For temperatures over +60°C an   Fuels                              +                                                                                       1.2
          additional securing is required.                    Greases, oils without additives      +                                    80                                                 1.0
          Application temperatures, page 53                   Hydrocarbons                         +                                    60                                                 0.8         Free cutting steel   Cf53, hard chromed  304 stainless steel
          Additional securing, page 53                        Strong acids                          –                                   40                                                 0.6    H.a. aluminium       HR carbon steel  High grade steel
                                                                                                                                                                                           0.4
                                                              Strong alkalines                     0                                    20                                              Wear [µm/km]  0.2   Cf53 steel
          Friction and wear                                  All data given at room temperature [+20°C]                              Load [MPa]  0                                         0.0
          Similar to wear resistance, the coefficient of friction μ   Table 02: Chemical resistance                                        20    30   40   50   60    70   80   90
          also changes with the load. In contrast to other iglidur    Chemical table, page 1170                                       Temperature [°C]
                                                         ®
          materials, the coefficient of friction of iglidur  W300 remains                                                           Diagram 02: Maximum recommended surface pressure as a   Diagram 06: Wear, rotating with different shaft materials,
                                             ®
          consistently low at higher rotational speeds.                        Rotating Oscillating   linear                        function of temperature (60MPa at +20°C)           pressure, p = 1MPa, v = 0.3m/s
          Coefficient of friction and surfaces, page 51       Long-term  m/s      1.0       0.7        4.0
          Wear resistance, page 54                            Short-term  m/s     1.5       1.8        6.0                                                                                 70
                                                             Table 03: Maximum surface speeds                                            8                                                 60         rotating
          Shaft materials                                                                                                                        +23°C                                     50         oscillating
                                                                                                                                                 +60°C
          The friction and wear are also dependent, to a large degree,             Dry    Greases Oil  Water                             6                                                 40
          on the mating partner. Shafts that are too smooth increase   Coefficient of friction μ 0.08 -0.23  0.09  0.04  0.04            4                                                 30
          both the coefficient of friction and the wear of the bearing.   Table 04: Coefficient of friction against steel (Ra = 1μm,                                                       20
          Smooth shafts have the danger of stick slip. Squeaking as   50HRC)                                                         Deformation [%]  2                                 Wear [µm/km]  10
          an effect of stick-slip is usually the result of shafts that are                                                               0                                                  0
          too smooth. Shaft finishes of Ra = 0.4-0.5µm have proven        Housing   Plain bearings   Shaft                                 0         15       30       45       60             0,25  0,75  2,00  5,00  10,00  45,00  76,00
          best. For iglidur  W300, the wear resistance is still excellent   Ø d1 [mm]  H7 [mm]  E10 [mm]  h9 [mm]                     Load [MPa]                                         Load [MPa]
                      ®
          with this surface finish as the friction adopts the minimum   0-3  +0.000 +0.010 +0.014 +0.054 -0.025 +0.000              Diagram 03: Deformation under pressure and temperature  Diagram 07: Wear for oscillating and rotating applications
          value. Diagram 06 shows results of testing different shafts.   > 3-6  +0.000 +0.012 +0.020 +0.068 -0.030 +0.000                                                              with shaft material Cf53 hardened and ground steel, as a
          Hardened shafts are preferred for applications for higher   > 6-10  +0.000 +0.015 +0.025 +0.083 -0.036 +0.000                                                                function of the load
          loads. If the shaft material you plan on using is not shown   > 10-18  +0.000 +0.018 +0.032 +0.102 -0.043 +0.000              1.0
          in these test results, please contact us.           > 18-30   +0.000 +0.021 +0.040 +0.124 -0.052 +0.000
          Shaft materials, page 56                            > 30-50   +0.000 +0.025 +0.050 +0.150 -0.062 +0.000
                                                              > 50-80   +0.000 +0.030 +0.060 +0.180 -0.074 +0.000                       1.0
                                                              > 80-120  +0.000 +0.035 +0.072 +0.212 -0.087 +0.000                    Coefficient of friction [µ]
                                                              > 120-180  +0.000 +0.040 +0.085 +0.245 -0.100 +0.000
                                                             Table 05: Important tolerances for plain bearings according                0.4
                                                             to ISO 3547-1 after press-fit                                                 0.05  0.10   0.15  0.20  0.25  0.30  0.35

                                                                                                                                      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



          178   3D-CAD, finder and service life calculation ... www.igus-asean.com/W300                                                                         Lubrication-free made easy ... from stock ... no minimum order quantity  179
   175   176   177   178   179   180   181   182   183   184   185