Page 406 - IGUS Bearing

iglidur A181 iglidur A181
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+90°C +90°C
31MPa 31MPa
Bearing technology | Plain bearings | iglidur A181 Technical data
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100.0 0.26
Chemicals Resistance
Temperature Alcohols + 10.0 0.23
The long-term upper temperature limit of +90°C permits Diluted acids 0 up to – 0.20
the broad use in applications with direct contact with food. Diluted alkalines + 1.0 0.17
As shown in diagram 02, with increasing temperatures, Fuels + 0.14
the compressive strength decreases. When considering Greases, oils without additives + Surface pressure [MPa] 0.1 Coefficient of friction [µ] 0.11
temperatures, the additional frictional heat in the bearing Hydrocarbons + 0.08
0.05
system must be taken into account. For temperatures over Strong acids – 0.01 0.001 0.01 0.1 1.0 10.0 0 5 10 15 20 25 30
+60°C an additional securing is required. Strong alkalines + up to 0
Application temperatures, page 53 Surface speed [m/s] Load [MPa]
Additional securing, page 53 All data given at room temperature [+20°C] Diagram 01: Permissible pv values for iglidur A181 with a Diagram 05: Coefficient of friction as a function of the
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Table 02: Chemical resistance
Chemical table, page 1170 wall thickness of 1mm dry operation against a steel shaft at pressure, v = 0.01m/s
Friction and wear +20°C, mounted in a steel housing
Similar to wear resistance, the coefficient of friction µ also Rotating Oscillating linear
changes with the surface speed and load (diagram 04 and Long-term m/s 0.8 0.6 3.5 40 3.0
05). For iglidur A181 plain bearings, the alteration of the Short-term m/s 1.2 1.0 5.0 35 2.5
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coefficient of friction μ depends on surface speed and the 30
shaft surface finish. Table 03: Maximum surface speeds 25 2.0
Coefficient of friction and surfaces, page 51 Dry Greases Oil Water 20 1.5 Free cutting steel Cf53, hard chromed 304 stainless steel
Wear resistance, page 54 15 1.0 H.a. aluminium HR carbon steel High grade steel
Coefficient of friction μ 0.10-0.21 0.08 0.03 0.04 10 0.5 Cf53 steel
Table 04: Coefficient of friction against steel (Ra = 1μm, Load [MPa] 5 Wear [µm/km]
Shaft materials 0 0.0
Diagram 06 shows results of testing different shaft 50HRC) 20 30 40 50 60 70 80 90
materials with plain bearings made from iglidur A181. Housing Plain bearings Shaft Temperature [°C]
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Particular attention is paid in the food industry to the 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,
corrosion- resistant shaft types. Diagram 06 shows that 0-3 +0.000 +0.010 +0.014 +0.054 -0.025 +0.000 function of temperature (31MPa at +20°C) pressure, p = 1MPa, v = 0.3m/s
very low wear rates can be achieved in combination with > 3-6 +0.000 +0.012 +0.020 +0.068 -0.030 +0.000
these shafts. As with many of the iglidur materials, wear > 6-10 +0.000 +0.015 +0.025 +0.083 -0.036 +0.000 10 200
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rate increases with otherwise identical parameters in > 10-18 +0.000 +0.018 +0.032 +0.102 -0.043 +0.000 rotating
rotation (diagram 07). > 18-30 +0.000 +0.021 +0.040 +0.124 -0.052 +0.000 8 +23°C 150 oscillating
Shaft materials, page 56 6 +60°C
> 30-50 +0.000 +0.025 +0.050 +0.150 -0.062 +0.000 100
> 50-80 +0.000 +0.030 +0.060 +0.180 -0.074 +0.000 4
Installation tolerances > 80-120 +0.000 +0.035 +0.072 +0.212 -0.087 +0.000 50
iglidur A181 plain bearings are standard bearings for > 120-180 +0.000 +0.040 +0.085 +0.245 -0.100 +0.000 Deformation [%] 2 Wear [µm/km]
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shafts with h-tolerance (recommended minimum h9). The 0 0
bearings are designed for press-fit into a housing machined Table 05: Important tolerances for plain bearings according 0 5 10 15 20 25 30 35 0 15 30 45
to a H7 tolerance. After being assembled into a nominal to ISO 3547-1 after press-fit Load [MPa] Load [MPa]
size housing, the inner diameter automatically adjusts to Diagram 03: Deformation under pressure and temperature Diagram 07: Wear for oscillating and rotating applications
the E10 tolerances. with shaft material Cf53 hardened and ground steel, as a
Testing methods, page 61 function of the load
0.4

0.3
Coefficient of friction [µ] 0.2

0.1

0.0
0.10 0.15 0.20 0.25 0.30 0.35 0.40 0.45 0.50
Surface speed [m/s]
ASEAN 09/2023 ASEAN 09/2023 surface speed, p = 1MPa
Diagram 04: Coefficient of friction as a function of the

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