Page 180 - IGUS Bearing

iglidur W300 iglidur W300
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+90°C +90°C
60MPa 60MPa
Bearing technology | Plain bearings | iglidur W300 Technical data
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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
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iglidur W300 plain bearings do not increase. In relation shafts with h-tolerance (recommended minimum h9). The 0.20
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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
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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
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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
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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]
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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,
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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]
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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

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