Page 307 - IGUS Bearing

iglidur Z iglidur Z
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+250°C +250°C
150MPa 150MPa
Bearing technology | Plain bearings | iglidur Z Technical data
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Permissible surface speeds Chemicals Resistance 1,000 0.25
iglidur Z is a high temperature material that is suitable Alcohols 0 100 0.20
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for applications involving very high specific loads. The Diluted acids + 0.15
maximum values shown in table 03 can only be achieved Diluted alkalines + 10
at low pressures. At the given speeds, friction can cause Fuels + 0.10
a temperature increase to maximum permissible levels. In Greases, oils without additives + Surface pressure [MPa] 1 Coefficient of friction [µ] 0.05
practice, though, this level is rarely reached due to varying Hydrocarbons +
application conditions. Strong acids – 0.1 0.001 0.01 0.1 1.0 10.0 0.00
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 Z plain bearing Diagram 05: Coefficient of friction as a function of the
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The iglidur Z plain bearings can be used at temperatures Table 02: Chemical resistance with a wall thickness of 1mm dry operation against a steel pressure, v = 0.01m/s
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Chemical table, page 1170
up to +310°C for short periods. The temperatures prevailing shaft at +20°C, mounted in a steel housing.
in the bearing system also have an influence on the wear. Rotating Oscillating linear
The wear rises with increasing temperatures. At high Long-term m/s 1.5 1.1 5.0 160 12.0
temperatures iglidur Z is also the most wear-resistant Short-term m/s 3.5 2.5 6.0 140 10.0
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material in dry operation. For temperatures over +145°C 120
an additional securing is required. Table 03: Maximum surface speeds 100 8.0
Application temperatures, page 53 Dry Greases Oil Water 80 6.0 Free cutting steel Cf53, hard chromed 304 stainless steel
Additional securing, page 53 60 4.0 H.a. aluminium HR carbon steel High grade steel
Coefficient of friction μ 0.06-0.14 0.09 0.04 0.04 40 2.0 Cf53 steel
Table 04: Coefficient of friction against steel (Ra = 1μm, Load [MPa] 20 Wear [µm/km]
Friction and wear 0 0.0
The coefficient of friction declines just as the wear 50HRC) 20 50 80 120 150 200 250
resistance with increasing load (diagrams 04 and 05). 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 (150MPa 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 8 140
Diagram 06 shows wear rates in the lower load range, > 10-18 +0.000 +0.018 +0.016 +0.086 -0.043 +0.000 7 120 rotating
which are very similar to those of other wear-resistant > 18-30 +0.000 +0.021 +0.020 +0.104 -0.052 +0.000 6 100 oscillating
iglidur materials. However, in the upper load range > 30-50 +0.000 +0.025 +0.025 +0.125 -0.062 +0.000 5 +23 °C +60 °C 80
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iglidur Z outperforms all other materials in wear resistance. > 50-80 +0.000 +0.030 +0.030 +0.150 -0.074 +0.000 4 60
Provided a Cf53 hardened and ground steel shaft is used, > 80-120 +0.000 +0.035 -0.036 +0.176 -0.087 +0.000 3 40
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the wear is still only 15µm/km at 45MPa. At low loads > 120-180 +0.000 +0.040 +0.043 +0.203 +0.000 +0.100 Deformation [%] 1 Wear [µm/km] 20
iglidur Z plain bearings wear less in pivoting applica- 0 0
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tions than in rotating applications. 304 stainless steel and Table 05: Important tolerances for plain bearings according 0 30 60 90 120 150 0 10 20 30 40 50 60 70 80 90 100
hard-chromed shafts are of interest here. to ISO 3547-1 after press-fit Load [MPa] Load [MPa]
Shaft materials, page 56 Diagram 03: Deformation under pressure and temperature Diagram 07: Wear for oscillating and rotating applications
with shaft material Cf53 hardened and ground steel, as a
Installation tolerances function of the load
iglidur Z plain bearings are standard bearings for 0.4
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shafts with h-tolerance (recommended minimum h9).
The bearings are designed for press-fit into a housing 0.3
machined to a H7 tolerance. After being assembled into a
nominal size housing, in standard cases the inner diameter Coefficient of friction [µ] 0.2
automatically adjusts to the F10 tolerances. For particular
dimensions the tolerance differs depending on the wall
thickness (please see product range table). 0.1
0.10
0.05
Testing methods, page 61 Surface speed [m/s] 0.15 0.20 0.25 0.30 0.35
ASEAN 09/2023 ASEAN 09/2023 Diagram 04: Coefficient of friction as a function of the

surface speed, p = 0.75MPa

304 3D-CAD, finder and service life calculation ... www.igus-asean.com/Z Lubrication-free made easy ... from stock ... no minimum order quantity 305