Page 193 - IGUS Bearing

iglidur J3 iglidur J3
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+90°C +90°C
45MPa 45MPa
Bearing technology | Plain bearings | iglidur J3 Technical data
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Permissible surface speeds Installation tolerances 100.0 0.25
iglidur J3 is also suitable for medium to high surface iglidur J3 plain bearings are standard bearings for shafts 10.0
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speeds. The maximum values shown in table 03 can only with h-tolerance (recommended minimum h9). The 0.20
be achieved at low pressures. At the given speeds, friction bearings are designed for press-fit into a housing machined 1.0
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]
to varying application conditions. 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 0.10
range table). In relation to the installation tolerance, the 0 15 25 35 45
Temperature inner diameter changes with the absorption of humidity. 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 J3 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 +90°C. For temperatures over Chemicals Resistance
+60°C an additional securing is required. Alcohols + 90 1.6
Application temperatures, page 53 Diluted acids 0 up to – 80 1.4
Additional securing, page 53 Diluted alkalines + 70 1.2
Fuels + 60 1.0
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Friction and wear Greases, oils without additives + 40 0.8 Free cutting steel Cf53, hard chromed 304 stainless steel
Similar to wear resistance, the coefficient of friction µ also Hydrocarbons + 30 0.6 H.a. aluminium HR carbon steel High grade steel
0.4
changes with the surface speed and load (diagrams 04 Strong acids – 20 Wear [µm/km] 0.2 Cf53 steel
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and 05). Strong alkalines + up to 0 Load [MPa] 0 0.0
Coefficient of friction and surfaces, page 51 All data given at room temperature [+20°C] 20 30 40 50 60 70 80 90
Wear resistance, page 54 Table 02: Chemical resistance Temperature [°C]
Chemical table, page 1170 Diagram 02: Maximum recommended surface pressure as a Diagram 06: Wear, rotating with different shaft materials,
Shaft materials function of temperature (45MPa at +20°C) pressure, p = 1MPa, v = 0.3m/s
The friction and wear are also dependent, to a large Rotating Oscillating linear
degree, on the mating partner. Shafts that are too smooth Long-term m/s 1.5 1.1 8.0 10 45
increase both the coefficient of friction and the wear of the Short-term m/s 3.0 2.1 10.0 40 rotating
oscillating
bearing. For iglidur J3 a ground surface with an average Table 03: Maximum surface speeds 8 +23°C 35
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30
surface finish Ra = 0.1-0.3µm is recommended. Diagram 6 +60°C 25
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06 shows that iglidur J3 can be combined with various Dry Greases Oil Water 4 20
shaft materials. Diagram 07 shows rotating and pivoting Coefficient of friction μ 0.06-0.20 0.09 0.04 0.04 15
applications in comparison. With higher load, the wear Table 04: Coefficient of friction against steel (Ra = 1μm, Deformation [%] 2 Wear [µm/km] 10
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increases more for rotating than for pivoting movements. 50HRC) 0 0
Shaft materials, page 56 0 5 10 15 20 25 30 35 40 45 0 5 10 15 20 25 30 35 40 45
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 0.25
> 10-18 +0.000 +0.018 +0.032 +0.102 -0.043 +0.000
> 18-30 +0.000 +0.021 +0.040 +0.124 -0.052 +0.000 0.20
> 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 Coefficient of friction [µ] 0.15
> 80-120 +0.000 +0.035 +0.072 +0.212 -0.087 +0.000
> 120-180 +0.000 +0.040 +0.085 +0.245 -0.100 +0.000
Table 05: Important tolerances for plain bearings according 0.10 0.05 0.10 0.15 0.20 0.25 0.30 0.35
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 = 0.75MPa

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