Page 140 - IGUS Bearing

iglidur P iglidur P
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+130°C +130°C
50MPa 50MPa
Bearing technology | Plain bearings | iglidur P Technical data
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Permissible surface speeds Installation tolerances 100.0 0.25
Plain bearings made from iglidur P are maintenance-free iglidur P plain bearings are standard bearings for shafts 10.0 0.20
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plain bearings developed for low to medium surface with h-tolerance (recommended minimum h9). The 0.15
speeds. The maximum values given in table 03 can only bearings are designed for press-fit into a housing machined 1.0
be achieved at a very low surface pressure. The maximum to a H7 tolerance. After being assembled into a nominal 0.10
speed given is the speed at which an increase up to the size housing, the inner diameter automatically adjusts to Surface pressure [MPa] 0.1 Coefficient of friction [µ] 0.05
continuous use temperature occurs due to friction. the E10 tolerances. For particular dimensions the tolerance
Surface speed, page 48 differs depending on the wall thickness (please see product 0.01 0.001 0.01 0.1 1.0 10.0 0.00 0 5 10 15 20 25 30 35
range table).
Temperature Testing methods, page 61 Surface speed [m/s] Load [MPa]
Even with its maximum long-term application temperature Diagram 01: Permissible pv values for iglidur P plain bearing Diagram 05: Coefficient of friction as a function of the
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of +130°C, the values for iglidur P do not quite come up with a wall thickness of 1mm dry operation against a steel pressure, v = 0.01m/s
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to those of iglidur G. The temperatures prevailing in the Chemicals Resistance shaft at +20°C, mounted in a steel housing.
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bearing system also have an influence on the wear. The Alcohols +
wear rises with increasing temperatures. For temperatures Diluted acids 0 60 18
over +90°C an additional securing is required. Diluted alkalines – 50 16
Application temperatures, page 53 Fuels + 14
Additional securing, page 53 Greases, oils without additives + 40 12
10
Hydrocarbons – 30 8 Free cutting steel Cf53, hard chromed 304 stainless steel
Friction and wear Strong acids – 20 6 H.a. aluminium HR carbon steel High grade steel
The coefficient of friction declines just as the wear Strong alkalines – 10 Wear [µm/km] 4 Cf53 steel
2
resistance with increasing load (diagrams 04 and 05). All data given at room temperature [+20°C] Load [MPa] 0 0
iglidur P plain bearings obtain a minimum coefficient of Table 02: Chemical resistance 20 30 40 50 60 70 80 90 100 110 120 130
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friction on shafts with a surface finish Ra from 0.1-0.2µm. Chemical table, page 1170 Temperature [°C]
Both smoother and rougher shaft surface finish cause the Diagram 02: Maximum recommended surface pressure as a Diagram 06: Wear, rotating with different shaft materials,
friction to clearly increase. Rotating Oscillating linear function of temperature (50MPa 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 3.0
Wear resistance, page 54 Short-term m/s 2.0 1.4 4.0 10 180
Table 03: Maximum surface speeds 160 rotating
oscillating
Shaft materials 8 +23°C 140
120
Diagram 06 shows results of testing different shaft Dry Greases Oil Water 6 +60°C 100
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materials with plain bearings made from iglidur P. For Coefficient of friction μ 0.06-0.21 0.09 0.04 0.04 4 80
rotational movements, the wear of iglidur P with Cf53 Table 04: Coefficient of friction against steel (Ra = 1μm, 60
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and HR carbon steel shafts is very low. On the other hand, 50HRC) Deformation [%] 2 Wear [µm/km] 40
20
the bearings hard-chromed shafts result in higher wear 0 0
than other shaft materials even in the low load range. For Housing Plain bearings Shaft 0 10 20 30 40 50 0 10 20 30 40 50
example at a load of 2MPa, cold rolled steel is six times Ø d1 [mm] H7 [mm] E10 [mm] h9 [mm] Load [MPa] Load [MPa]
better than 304 stainless steel. For pivoting movement, 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
hardened shafts and 304 stainless steel perform better > 3-6 +0.000 +0.012 +0.020 +0.068 -0.030 +0.000 with shaft material Cf53 hardened and ground steel, as a
than that of a softer unhardened carbon shafts. > 6-10 +0.000 +0.015 +0.025 +0.083 -0.036 +0.000 function of the load
Shaft materials, page 56 > 10-18 +0.000 +0.018 +0.032 +0.102 -0.043 +0.000 0.4
> 18-30 +0.000 +0.021 +0.040 +0.124 -0.052 +0.000
> 30-50 +0.000 +0.025 +0.050 +0.150 -0.062 +0.000 0.3
> 50-80 +0.000 +0.030 +0.060 +0.180 -0.074 +0.000
> 80-120 +0.000 +0.035 +0.072 +0.212 -0.087 +0.000 Coefficient of friction [µ] 0.2
> 120-180 +0.000 +0.040 +0.085 +0.245 -0.100 +0.000
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

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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