Page 90 - IGUS Bearing

iglidur G iglidur G
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+130°C +130°C
80MPa 80MPa
Bearing technology | Plain bearings | iglidur G Technical data
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Permissible surface speeds Installation tolerances 100.0 0.35
iglidur G has been developed for low to medium surface iglidur G plain bearings are standard bearings for shafts 10.0 0.30
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speeds. The maximum values shown in table 03 can only with h-tolerance (recommended minimum h9). The 0.25
be achieved at low pressures. At the given speeds, friction bearings are designed for press-fit into a housing machined 1.0 0.20
can cause a temperature increase to maximum permissible to a H7 tolerance. After being assembled into a nominal 0.15
levels. In practice, though, this level is rarely reached due size housing, the inner diameter automatically adjusts to Surface pressure [MPa] 0.1 Coefficient of friction [µ] 0.10
to varying application conditions. the E10 tolerances. For particular dimensions the tolerance 0.05
0.00
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 10 20 30 40 50 60 70 80
range table).
Temperature Testing methods, page 61 Surface speed [m/s] Load [MPa]
The ambient temperatures strongly influence the properties Diagram 01: Permissible pv values for iglidur G plain bearing Diagram 05: Coefficient of friction as a function of the
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of plain bearings. The temperatures prevailing in the bearing with a wall thickness of 1mm dry operation against a steel pressure, v = 0.01m/s
system also have an influence on the wear. With increasing Chemicals Resistance shaft at +20°C, mounted in a steel housing.
temperatures, the wear increases and this effect is significant Alcohols + up to 0
when temperatures rise over +120°C. For temperatures Diluted acids 0 up to – 120 10
over +80°C an additional securing is required. Diluted alkalines + 100
Application temperatures, page 53 Fuels + 8
Additional securing, page 53 Greases, oils without additives + 80 6
Hydrocarbons + 60 4 Free cutting steel Cf53, hard chromed 304 stainless steel
Friction and wear Strong acids – 40 H.a. aluminium HR carbon steel High grade steel
Similar to wear resistance, the coefficient of friction µ also Strong alkalines 0 20 Wear [µm/km] 2 Cf53 steel
changes with the surface speed and load (diagrams 04 All data given at room temperature [+20°C] Load [MPa] 0 0
and 05). Table 02: Chemical resistance 20 30 40 50 60 70 80 90 100 110 120 130
Coefficient of friction and surfaces, page 51 Chemical table, page 1170 Temperature [°C]
Wear resistance, page 54 Diagram 02: Maximum recommended surface pressure as a Diagram 06: Wear, rotating with different shaft materials,
Rotating Oscillating linear function of temperature (80MPa at +20°C) pressure, p = 1MPa, v = 0.3m/s
Shaft materials Long-term m/s 1.0 0.7 4.0
The friction and wear are also dependent, to a large Short-term m/s 2.0 1.4 5.0 10 200
degree, on the mating partner. Shafts that are too smooth Table 03: Maximum surface speeds 180 rotating
oscillating
increase both the coefficient of friction and the wear of the 8 +23°C 160
140
bearing. For iglidur G a ground surface with an average Dry Greases Oil Water 6 +60°C 120
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surface finish Ra = 0.8µm is recommended. Diagram 06 Coefficient of friction μ 0.08-0.15 0.09 0.04 0.04 4 100
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shows results of testing different shaft materials with plain Table 04: Coefficient of friction against steel (Ra = 1μm, 60
bearings made from iglidur G. It is important to notice that 50HRC) Deformation [%] 2 Wear [µm/km] 40
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20
with increasing loads, the recommended hardness of the 0 0
shaft increases. The "soft" shafts tend to wear themselves Housing Plain bearings Shaft 0 25 50 75 100 0 10 20 30 40 50 60 70 80
and thus increase the wear of the overall system. If the Ø d1 [mm] H7 [mm] E10 [mm] h9 [mm] Load [MPa] Load [MPa]
loads exceed 2MPa it is important to recognise that the 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
wear rate (the gradient of the curves) clearly decreases with > 3-6 +0.000 +0.012 +0.020 +0.068 -0.030 +0.000 with shaft material Cf53 hardened and ground steel, as a
the hard shaft materials. If the shaft material you plan on > 6-10 +0.000 +0.015 +0.025 +0.083 -0.036 +0.000 function of the load
using is not shown in these test results, please contact us. > 10-18 +0.000 +0.018 +0.032 +0.102 -0.043 +0.000 0.5
Shaft materials, page 56 > 18-30 +0.000 +0.021 +0.040 +0.124 -0.052 +0.000 0.4
> 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 0.3
> 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 0.2
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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