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iglidur Q2 iglidur Q2
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+130°C +130°C
120MPa 120MPa
Bearing technology | Plain bearings | iglidur Q2 Technical data
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Permissible surface speeds Installation tolerances 1,000 0.35
Typical applications for iglidur Q2 plain bearings are iglidur Q2 plain bearings are standard bearings for 100 0.30
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pivoting movements under high loads at comparatively shafts with h-tolerance (recommended minimum h9). The 0.25
low speeds. However, relatively high speeds are still bearings are designed for press-fit into a housing machined 10 0.20
attainable. The speeds stated in table 03 are limit values for to a H7 tolerance. After being assembled into a nominal 0.15
the lowest bearing loads. With higher loads, the permitted size housing, the inner diameter automatically adjusts to Surface pressure [MPa] 1 Coefficient of friction [µ] 0.10
speed drops with the extent of the load due to the the E10 tolerances. For particular dimensions the tolerance 0.05
limitations by the pv value. differs depending on the wall thickness (please see product 0.1 0.001 0.01 0.1 1.0 10.0 0.00
Surface speed, page 48 range table). 0 10 20 30 40 50 60 70 80
Testing methods, page 61 Surface speed [m/s] Load [MPa]
Temperature Diagram 01: Permissible pv values for iglidur Q2 plain Diagram 05: Coefficient of friction as a function of the
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iglidur Q2 is an extremely temperature-resistant material. bearing with a wall thickness of 1mm dry operation against pressure, v = 0.01m/s
The long-term upper temperature limit of +130°C permits Chemicals Resistance a steel shaft at +20°C, mounted in a steel housing.
the broad use in applications typical for the agricultural, Alcohols +
utility vehicle or construction equipment sectors. With Diluted acids 0 up to – 160 200
increasing temperatures, the compressive strength of Diluted alkalines + 140 180
iglidur Q2 plain bearings decreases. For temperatures Fuels + 120 160
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140
over +70°C an additional securing is required. When Greases, oils without additives + 100 120
considering temperatures, the additional frictional heat in Hydrocarbons + 80 100 Cf53, hard chromed 304 stainless steel
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the bearing system must be taken into account. Strong acids – 60 60 High grade steel
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Application temperatures, page 53 Strong alkalines 0 20 Wear [µm/km] 40 Cf53 steel
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Additional securing, page 53 All data given at room temperature [+20°C] Load [MPa] 0 0
Table 02: Chemical resistance 20 30 40 50 60 70 80 90 100 110 120 130
Friction and wear Chemical table, page 1170 Temperature [°C]
The coefficient of friction of iglidur Q2 is low. Please Diagram 02: Maximum recommended surface pressure as a Diagram 06: Wear, pivoting with different shaft materials,
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note that a sliding surface with a rough surface finish will Rotating Oscillating linear function of temperature (120MPa at +20°C) pressure p = 45MPa, v = 0.01m/s
increase the friction. The highest coefficient of friction occur Long-term m/s 1.0 0.7 4.0
at Ra = 1μm. Surface finishes (Ra) of the shaft between Short-term m/s 2.0 1.4 5.0 9.0 670
0.1-0.4µm are ideal. Furthermore, the coefficient of friction Table 03: Maximum surface speeds 8.0 180 rotating
oscillating
of iglidur Q2 plain bearings largely depends on the speed 7.0 +23°C 160
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140
6.0
and load. As the surface speed increases, the coefficient Dry Greases Oil Water 5.0 +60°C 120
of friction will quickly increase as well. However, as the Coefficient of friction μ 0.22-0.42 0.09 0.04 0.04 4.0 100
80
load is reduced, the coefficient of friction initially drops Table 04: Coefficient of friction against steel (Ra = 1μm, 3.0 60
significantly, then moderately. 50HRC) Deformation [%] 2.0 Wear [µm/km] 40
1.0
20
Coefficient of friction and surfaces, page 51 0.0 0
Wear resistance, page 54 Housing Plain bearings Shaft 0 25 50 75 1 2 10 20 45 76 100
Ø d1 [mm] H7 [mm] E10 [mm] h9 [mm] Load [MPa] Load [MPa]
Shaft materials 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
In high load applications, we generally recommend the use > 3-6 +0.000 +0.012 +0.020 +0.068 -0.030 +0.000 with shaft material Cf53 hardened and ground steel, as a
of hardened shafts. Furthermore, even at low to medium > 6-10 +0.000 +0.015 +0.025 +0.083 -0.036 +0.000 function of the load
loads, iglidur Q2 will attain increased service life with > 10-18 +0.000 +0.018 +0.032 +0.102 -0.043 +0.000 0.6
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"hard" shafts as compared to "soft" shafts. But for low > 18-30 +0.000 +0.021 +0.040 +0.124 -0.052 +0.000 0.5
load applications, the results are outstanding with free > 30-50 +0.000 +0.025 +0.050 +0.150 -0.062 +0.000 0.4
cutting steel as well. For high loads, the wear in pivoting > 50-80 +0.000 +0.030 +0.060 +0.180 -0.074 +0.000
applications is much lower than for rotation. If the shaft > 80-120 +0.000 +0.035 +0.072 +0.212 -0.087 +0.000 Coefficient of friction [µ] 0.3
material you plan on using is not shown in these test > 120-180 +0.000 +0.040 +0.085 +0.245 -0.100 +0.000 0.2
results, please contact us. Table 05: Important tolerances for plain bearings according
Shaft materials, page 56 to ISO 3547-1 after press-fit 0.1 0.1 0.2 0.3 0.4 0.5 0.6 0.7

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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