Page 567 - IGUS Bearing

iglidur H4 iglidur H4
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+200°C +200°C
65MPa 65MPa
Bearing technology | Plain bearings | iglidur H4 Technical data
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Permissible surface speeds Chemicals Resistance 100.0 0.7
In contrast to the similarly cost-effective iglidur H2 plain Alcohols + 10.0 0.6
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bearings, iglidur H4 has a favourable coefficient of friction. Diluted acids + up to 0 0.5
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This accounts for the higher permitted surface speeds that Diluted alkalines + 1.0 0.4
can be attained with these bearings. The speeds stated in Fuels + 0.3
table 03 are limit values for the lowest bearing loads. With Greases, oils without additives + Surface pressure [MPa] 0.1 Coefficient of friction [µ] 0.2
higher loads, the permitted speed drops with the extent of Hydrocarbons + 0.1
the load due to the limitations by the pv value. Strong acids 0 up to – 0.01 0.001 0.01 0.1 1.0 10.0 0.0
Surface speed, page 48 Strong alkalines + 0 10 20 30 40 50 60 70 80
Surface speed [m/s] Load [MPa]
All data given at room temperature [+20°C]
Temperature Diagram 01: Permissible pv values for iglidur H4 plain Diagram 05: Coefficient of friction as a function of the
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iglidur H4 is an extremely temperature-resistant material. Table 02: Chemical resistance bearing with a wall thickness of 1mm dry operation against pressure, v = 0.01m/s
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Chemical table, page 1170
With increasing temperatures, the compressive strength a steel shaft at +20°C, mounted in a steel housing.
of iglidur H4 plain bearings decreases. When considering Rotating Oscillating linear
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temperatures, the additional frictional heat in the bearing Long-term m/s 1.0 0.7 1.0 70 10
system must be taken into account. For temperatures over Short-term m/s 1.5 1.1 2.0 60 9
+110°C an additional securing is required. 50 8
7
Application temperatures, page 53 Table 03: Maximum surface speeds 40 6
Additional securing, page 53 30 5 Cf53, hard chromed
Dry Greases Oil Water 4 H.a. aluminium Free cutting steel HR carbon steel 304 stainless steel High grade steel
Coefficient of friction μ 0.08-0.25 0.09 0.04 0.04 20 3 Cf53 steel
Friction and wear Table 04: Coefficient of friction against steel (Ra = 1μm, 10 Wear [µm/km] 2
1
The coefficient of friction of the iglidur H4 plain bearings Load [MPa] 0 0
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is very low (diagrams 04 and 05). Please note that a sliding 50HRC) 20 50 80 120 150 200
surface with a rough surface finish will increase the friction. Housing Plain bearings Shaft Temperature [°C]
Coefficient of friction and surfaces, page 51 Ø d1 [mm] H7 [mm] F10 [mm] h9 [mm] Diagram 02: Maximum recommended surface pressure as a Diagram 06: Wear, rotating with different shaft materials,
Wear resistance, page 54 function of temperature (65MPa at +20°C) pressure, p = 1MPa, v = 0.3m/s
0-3 +0.000 +0.010 +0.006 +0.046 -0.025 +0.000
> 3-6 +0.000 +0.012 +0.010 +0.058 -0.030 +0.000
Shaft materials > 6-10 +0.000 +0.015 +0.013 +0.071 -0.036 +0.000 5.0 200
With many of the suitable shaft materials, iglidur H4 is the > 10-18 +0.000 +0.018 +0.016 +0.086 -0.043 +0.000 180 rotating
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oscillating
economical alternative to many other high-temperature > 18-30 +0.000 +0.021 +0.020 +0.104 -0.052 +0.000 4.0 +23°C 160
140
bearings. The important thing is however the selection of > 30-50 +0.000 +0.025 +0.025 +0.125 -0.062 +0.000 3.0 +60°C 120
the suitable shaft material. It cannot be generally stated that > 50-80 +0.000 +0.030 +0.030 +0.150 -0.074 +0.000 2.0 100
80
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iglidur H4 is suitable for use with hard or soft shafts. Tests > 80-120 +0.000 +0.035 -0.036 +0.176 -0.087 +0.000 60
have however shown that pivoting applications yield better > 120-180 +0.000 +0.040 +0.043 +0.203 +0.000 +0.100 Deformation [%] 1.0 Wear [µm/km] 40
20
wear data. In rotating applications, the wear increases 0.0 0
markedly from 10MPa. Table 05: Important tolerances for plain bearings according 0 20 40 65 0 10 20 30 40 50
Shaft materials, page 56 to ISO 3547-1 after press-fit Load [MPa] Load [MPa]
Diagram 03: Deformation under pressure and temperature Diagram 07: Wear for oscillating and rotating applications
Installation tolerances with shaft material Cf53 hardened and ground steel, as a
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iglidur H4 plain bearings are standard bearings for shafts function of the load
with h-tolerance (recommended minimum h9). After 0.5
being assembled into a nominal size housing, in standard 0.4
cases the inner diameter automatically adjusts to the F10
tolerances. For particular dimensions the tolerance differs 0.3
depending on the wall thickness (please see product range Coefficient of friction [µ]
table). 0.2
Testing methods, page 61 0.1
0.05
0.10
Surface speed [m/s] 0.15 0.20 0.25 0.30
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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