Page 614 - IGUS Bearing

iglidur AB iglidur AB
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+70°C +70°C
25MPa 25MPa
Bearing technology | Plain bearings | iglidur AB Technical data
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Permissible surface speeds Installation tolerances 100.0 0.3
iglidur AB is mainly suitable for low surface speeds in iglidur AB plain bearings are standard bearings for 10.0
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dry operation, but the specified values shown in table shafts with h-tolerance (recommended minimum h9). The 0.2
03 can only be achieved at very low pressures. At the bearings are designed for press-fit into a housing machined 1.0
given speeds, friction can cause a temperature increase to a H7 tolerance. After being assembled into a nominal 0.1
to maximum permissible levels. In practice, though, this size housing, the inner diameter automatically adjusts to Surface pressure [MPa] 0.1 Coefficient of friction [µ]
level is rarely reached due to varying application conditions. the E10 tolerances. In relation to the installation tolerance,
Surface speed, page 48 the inner diameter changes with the absorption of humidity. 0.01 0.001 0.01 0.1 1.0 10.0 0.0
For particular dimensions the tolerance differs depending 0 5 10 15 20 25 30
Temperature on the wall thickness (please see product range table). Surface speed [m/s] Load [MPa]
The temperatures prevailing in the bearing system also have Testing methods, page 61 Diagram 01: Permissible pv values for iglidur AB plain Diagram 05: Coefficient of friction as a function of the
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an influence on the wear. With increasing temperatures, bearing with a wall thickness of 1mm dry operation against pressure, v = 0.01m/s
the wear increases and this effect is significant when a steel shaft at +20°C, mounted in a steel housing.
temperatures rise over +60°C. For temperatures over Chemicals Resistance
+50°C an additional securing is required. Alcohols + up to 0 60 0.5
Application temperatures, page 53 Diluted acids 0 up to – 50
Additional securing, page 53 Diluted alkalines + 0.4
Fuels + 40 0.3
Friction and wear Greases, oils without additives + 30 0.2 Free cutting steel Cf53, hard chromed 304 stainless steel
Coefficient of friction and wear resistance are dependent Hydrocarbons + 20 H.a. aluminium HR carbon steel High grade steel
on the application parameters (diagrams 04 and 05). Strong acids – 10 Wear [µm/km] 0.1 Cf53 steel
Coefficient of friction and surfaces, page 51 Strong alkalines 0 Load [MPa] 0 0.0
Wear resistance, page 54 All data given at room temperature [+20°C] 20 30 40 50 60 70
Table 02: Chemical resistance Temperature [°C]
Shaft materials Chemical table, page 1170 Diagram 02: Maximum recommended surface pressure as a Diagram 06: Wear, rotating with different shaft materials,
The friction and wear are also dependent, to a large function of temperature (25MPa at +20°C) pressure, p = 1MPa, v = 0.3m/s
degree, on the mating partner. Shafts that are too smooth Rotating Oscillating linear
increase both the coefficient of friction and the wear of Long-term m/s 0.7 0.5 1.0 14 400
the bearing. Diagram 06 shows results of testing different Short-term m/s 1.0 0.7 1.8 12 360 rotating
oscillating
shafts. When rotating at a load of 1MPa, the wear on Table 03: Maximum surface speeds 10 +23°C 320
280
all tested shafts is very similar. Only the hard-anodised 8 +60°C 240
aluminium shafts cause a noticeable increase in the wear. Dry Greases Oil Water 6 200
160
As illustrated in diagram 07, the wear rate from pivoting Coefficient of friction μ 0.18-0.31 0.09 0.04 0.04 4 120
and rotational movements at loads in increasing levels is Table 04: Coefficient of friction against steel (Ra = 1μm, Deformation [%] 2 Wear [µm/km] 80
40
also quite similar if the remaining parameters are identical. 50HRC) 0 0
Shaft materials, page 56 0 10 20 30 40 0 5 10 15 20 25
Housing Plain bearings Shaft Load [MPa] Load [MPa]
Ø d1 [mm] H7 [mm] E10 [mm] h9 [mm] Diagram 03: Deformation under pressure and temperature Diagram 07: Wear for oscillating and rotating applications
0-3 +0.000 +0.010 +0.014 +0.054 -0.025 +0.000 with shaft material Cf53 hardened and ground steel, as a
> 3-6 +0.000 +0.012 +0.020 +0.068 -0.030 +0.000 function of the load
> 6-10 +0.000 +0.015 +0.025 +0.083 -0.036 +0.000 1.0
> 10-18 +0.000 +0.018 +0.032 +0.102 -0.043 +0.000 0.8
> 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 0.6
> 50-80 +0.000 +0.030 +0.060 +0.180 -0.074 +0.000 Coefficient of friction [µ] 0.4
> 80-120 +0.000 +0.035 +0.072 +0.212 -0.087 +0.000 0.2
> 120-180 +0.000 +0.040 +0.085 +0.245 -0.100 +0.000
Table 05: Important tolerances for plain bearings according 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
to ISO 3547-1 after press-fit Surface speed [m/s]
ASEAN 09/2023 ASEAN 09/2023 Diagram 04: Coefficient of friction as a function of the

surface speed, p = 1MPa

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