Page 200 - IGUS Bearing

iglidur J3B iglidur J3B
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+90°C +90°C
44MPa 44MPa
Bearing technology | Plain bearings | iglidur J3B Technical data
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Permissible surface speeds Chemicals Resistance 100.0 0.25
iglidur J3B is also suitable for medium to high surface Alcohols + 10.0
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speeds. The maximum values shown in table 03 can only Diluted acids 0 up to – 0.20
be achieved at low pressures. At the given speeds, friction Diluted alkalines + 1.0
can cause a temperature increase to maximum permissible Fuels + 0.15
levels. In practice, though, this level is rarely reached due Greases, oils without additives + Surface pressure [MPa] 0.1 Coefficient of friction [µ]
to varying application conditions. Hydrocarbons +
Surface speed, page 48 Strong acids – 0.01 0.001 0.01 0.1 1.0 10.0 0.10 0 15 25 35 45
Strong alkalines + up to 0
Temperature Surface speed [m/s] Load [MPa]
The temperatures prevailing in the bearing system also All data given at room temperature [+20°C] Diagram 01: Permissible pv values for iglidur J3B plain Diagram 05: Coefficient of friction as a function of the
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have an influence on the wear. For temperatures over Table 02: Chemical resistance bearing with a wall thickness of 1mm dry operation against pressure, v = 0.01m/s
Chemical table, page 1170
+60°C an additional securing is required. a steel shaft at +20°C, mounted in a steel housing
Application temperatures, page 53 Rotating Oscillating linear
Additional securing, page 53
Long-term m/s 1.5 1.1 8.0 120 2.5
Short-term m/s 3.0 2.1 10.0 100 2.0
Friction and wear
Similar to wear resistance, the coefficient of friction µ also Table 03: Maximum surface speeds 80 1.5
changes with the surface speed and load (diagrams 04 Dry Greases Oil Water 60 1.0 Free cutting steel Cf53, hard chromed 304 stainless steel
and 05). Coefficient of friction μ 0.08-0.17 0.09 0.04 0.04 40 H.a. aluminium HR carbon steel High grade steel
Coefficient of friction and surfaces, page 51 Table 04: Coefficient of friction against steel (Ra = 1μm, 20 Wear [µm/km] 0.5 Cf53 steel
Wear resistance, page 54 Load [MPa] 0 0.0
50HRC) 20 30 40 50 60 70 80
Shaft materials Housing Plain bearings Shaft Temperature [°C]
The friction and wear are also dependent, to a large Ø d1 [mm] H7 [mm] E10 [mm] h9 [mm] Diagram 02: Maximum recommended surface pressure as a Diagram 06: Wear, rotating with different shaft materials,
degree, on the mating partner. Shafts that are too smooth 0-3 +0.000 +0.010 +0.014 +0.054 -0.025 +0.000 function of temperature (44MPa at +20°C) pressure, p = 1MPa, v = 0.3m/s
increase both the coefficient of friction and the wear of the > 3-6 +0.000 +0.012 +0.020 +0.068 -0.030 +0.000
bearing. For iglidur J3B a ground surface with an average > 6-10 +0.000 +0.015 +0.025 +0.083 -0.036 +0.000 10 350
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surface finish Ra = 0.1-0.3µm is recommended. Diagram > 10-18 +0.000 +0.018 +0.032 +0.102 -0.043 +0.000 300 rotating
06 shows results of testing different shafts. Diagram 07 > 18-30 +0.000 +0.021 +0.040 +0.124 -0.052 +0.000 8 +23°C 250 oscillating
shows rotating and pivoting applications in comparison. > 30-50 +0.000 +0.025 +0.050 +0.150 -0.062 +0.000 6 +60°C 200
With higher load, the wear increases more for rotating than > 50-80 +0.000 +0.030 +0.060 +0.180 -0.074 +0.000 4 150
for pivoting movements. > 80-120 +0.000 +0.035 +0.072 +0.212 -0.087 +0.000 100
Shaft materials, page 56 Deformation [%] 2 50
> 120-180 +0.000 +0.040 +0.085 +0.245 -0.100 +0.000 Wear [µm/km]
Table 05: Important tolerances for plain bearings according 0 0
Installation tolerances 0 5 10 15 20 25 30 35 40 45 0 1 2 5 10 20 45
iglidur J3B plain bearings are standard bearings for to ISO 3547-1 after press-fit Load [MPa] Load [MPa]
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shafts with h-tolerance (recommended minimum h9). The Diagram 03: Deformation under pressure and temperature Diagram 07: Wear for oscillating and rotating applications
bearings are designed for press-fit into a housing machined with shaft material Cf53 hardened and ground steel, as a
to a H7 tolerance. After being assembled into a nominal function of the load
size housing, the inner diameter automatically adjusts to 0.25
the E10 tolerances. For particular dimensions the tolerance
Coefficient of friction [µ] 0.15
differs depending on the wall thickness (please see product 0.20
range table). In relation to the installation tolerance, the
inner diameter changes with the absorption of humidity.
Testing methods, page 61 0.10

0.1
0.2
Surface speed [m/s] 0.3 0.4 0.5
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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