Page 470 - IGUS Bearing

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iglidur iglidur
AX500 AX500
+250°C +250°C
69MPa 69MPa
Bearing technology | Plain bearings | iglidur AX500 Technical data
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Permissible surface speeds Installation tolerances 1,000 0.35
The maximum recommended surface speed is based on iglidur AX500 plain bearings are standard bearings for 100 0.30
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the frictional heat generated at the bearing surface. The shafts with h-tolerance (recommended minimum h9). 0.25
temperature should only be permitted to increase to a The bearings are designed for press-fit into a housing 10 0.20
value that will ensure a sustainable use of the bearing with machined to a H7 tolerance. After being assembled into a 0.15
respect to wear and dimensional integrity. The maximum nominal size housing, in standard cases the inner diameter Surface pressure [MPa] 1 Coefficient of friction [µ] 0.10
values stated in table 03 are valid only with minimum automatically adjusts to the F10 tolerances. 0.05
pressure loads and are often not attained in practice. Testing methods, page 61 0.1 0.001 0.01 0.1 1.0 10.0 0.00 0 10 20 30 40 50 60 70 80
Surface speed, page 48
Surface speed [m/s] Load [MPa]

Temperature Chemicals Resistance Diagram 01: Permissible pv values for AX500 plain bearings Diagram 05: Coefficient of friction as a function of the
iglidur AX500 belongs to the most temperature resistant Alcohols + with a wall thickness of 1mm, dry operation against a steel pressure, v = 0.01m/s
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iglidur materials. As in the case of all thermoplastics, the Diluted acids + shaft, at +20°C, mounted in a steel housing
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compressive strength of iglidur AX500 bearings decreases Diluted alkalines +
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when temperatures rise. The temperatures prevailing in the Fuels + 40 6
bearing system also have an influence on the wear. The Greases, oils without additives + 35 5
wear rises with increasing temperatures. For temperatures Hydrocarbons + 30
over +130°C an additional securing is required. Strong acids 0 up to – 25 4
Application temperatures, page 53 Strong alkalines + 20 3 Free cutting steel Cf53, hard chromed 304 stainless steel
Additional securing, page 53 All data given at room temperature [+20°C] 15 2 H.a. aluminium HR carbon steel High grade steel
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Table 02: Chemical resistance 5 Wear [µm/km] 1 Cf53 steel
Friction and wear Chemical table, page 1170 Load [MPa] 0 0
The coefficient of friction and wear in iglidur AX500 20 50 80 120 150 200
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are more favourable than in the other high temperature Rotating Oscillating linear Temperature [°C]
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materials iglidur X and A500. The coefficient of friction Long-term m/s 1.0 0.4 2.0 Diagram 02: Maximum recommended surface pressure as a Diagram 06: Wear, rotating with different shaft materials,
increases moderately as the sliding speed increases. The Short-term m/s 1.5 0.6 3.0 function of temperature (80MPa at +20°C) pressure, p = 1MPa, v = 0.3m/s
coefficient of friction initially drops rapidly to less than 0.1 Table 03: Maximum surface speeds
under loads of up to approximately 20MPa, and then only 10 200
marginally increases as loads continue to increase. The Dry Greases Oil Water 180 rotating
oscillating
friction and wear are also dependent, to a large degree, Coefficient of friction μ 0.08-0.22 0.09 0.04 0.04 8 +23°C 160
140
on the mating partner. Shafts that are too smooth increase Table 04: Coefficient of friction against steel (Ra = 1μm, 6 +60°C 120
both the coefficient of friction and the wear of the bearing. 50HRC) 4 100
80
Ground surfaces with an average surface finish Ra of 0.6 60
to 0.8µm are ideal. Housing Plain bearings Shaft Deformation [%] 2 Wear [µm/km] 40
20
Coefficient of friction and surfaces, page 51 Ø d1 [mm] H7 [mm] F10 [mm] h9 [mm] 0 0
Wear resistance, page 54 0-3 +0.000 +0.010 +0.006 +0.046 -0.025 +0.000 0 25 50 75 100 120 0 5 10 15 20 25 30 35 40 45
> 3-6 +0.000 +0.012 +0.010 +0.058 -0.030 +0.000 Load [MPa] Load [MPa]
Shaft materials > 6-10 +0.000 +0.015 +0.013 +0.071 -0.036 +0.000 Diagram 03: Deformation under pressure and temperature Diagram 07: Wear for oscillating and rotating applications
Diagram 06 shows a summary of the results of tests with > 10-18 +0.000 +0.018 +0.016 +0.086 -0.043 +0.000 with shaft material Cf53 hardened and ground steel, as a
different shaft materials executed with plain bearings made > 18-30 +0.000 +0.021 +0.020 +0.104 -0.052 +0.000 function of the load
of iglidur AX500. Using the example of a rotating motion > 30-50 +0.000 +0.025 +0.025 +0.125 -0.062 +0.000 0.30
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at 1MPa and a speed of 0.3m/s, it becomes apparent that > 50-80 +0.000 +0.030 +0.030 +0.150 -0.074 +0.000 0.25
iglidur AX500 has consistent wear characteristics across > 80-120 +0.000 +0.035 -0.036 +0.176 -0.087 +0.000 0.20
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a variety of shaft types. This wear rate spikes in combination > 120-180 +0.000 +0.040 +0.043 +0.203 +0.000 +0.100 0.15
with free cutting steel, and, notably so, reduces in Table 05: Important tolerances for plain bearings according Coefficient of friction [µ] 0.10
combination with HC aluminium. The wear under rotational to ISO 3547-1 after press-fit 0.05
loads is higher, specifically with increasing radial loads as
compared to pivoting movements (diagram 07). 0.00
0.30
0.10
Shaft materials, page 56 Surface speed [m/s] 0.50 0.70 0.90 1.10 1.30
ASEAN 09/2023 ASEAN 09/2023 Diagram 04: Coefficient of friction as a function of the

surface speed, p = 1MPa

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