Page 516 - IGUS Bearing

iglidur M260 iglidur M260
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+120°C +120°C
40MPa 40MPa
Bearing technology | Plain bearings | iglidur M260 Technical data
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Permissible surface speeds Installation tolerances 100.0 0.25
iglidur M260 has been developed for low to medium iglidur M260 plain bearings are standard bearings for 10.0 0.20
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surface speeds. The maximum values shown in table shafts with h tolerance (recommended minimum h9). The
03 can only be achieved at low pressures. At the given bearings are designed for press-fit into a housing machined 1.0 0.15
speeds, friction can cause a temperature increase to to a H7 tolerance. After being assembled into a nominal
maximum permissible levels. In practice, though, this level size housing, the inner diameter automatically adjusts to Surface pressure [MPa] 0.1 Coefficient of friction [µ] 0.10
is rarely reached due to varying application conditions. the D11 tolerances. For particular dimensions the tolerance
Surface speed, page 48 differs depending on the wall thickness (please see product 0.01 0.001 0.01 0.1 1.0 10.0 0.00
range table). 0 10 20 30 40
Temperature Testing methods, page 61 Surface speed [m/s] Load [MPa]
The temperatures prevailing in the bearing system also have Diagram 01: Permissible pv values for iglidur M260 with a Diagram 05: Coefficient of friction as a function of the
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an influence on the wear. With increasing temperatures, wall thickness of 1mm dry operation against a steel shaft at pressure, v = 0.01m/s
the wear increases and this effect is significant when Chemicals Resistance +20°C, mounted in a steel housing
temperatures rise over +80°C. For temperatures over Alcohols + up to 0
+80°C an additional securing is required. Diluted acids – 40 3.0
Application temperatures, page 53 Diluted alkalines + up to 0 2.5
Additional securing, page 53 Fuels – 30
Greases, oils without additives 0 up to – 2.0
Friction and wear Hydrocarbons + 20 1.5 Free cutting steel Cf53, hard chromed 304 stainless steel
Similar to wear resistance, the coefficient of friction μ Strong acids – 10 1.0 H.a. aluminium HR carbon steel High grade steel
also changes with the load. The coefficient of friction Strong alkalines + up to 0 Wear [µm/km] 0.5 Cf53 steel
decreases considerably with increasing loads, whereas a All data given at room temperature [+20°C] Load [MPa] 0 0.0
slight increase in surface speed causes an increase of the Table 02: Chemical resistance 20 30 40 50 60 70 80
coefficient of friction (Diagram 04 and 05). Chemical table, page 1170 Temperature [°C]
Coefficient of friction and surfaces, page 51 Diagram 02: Maximum recommended surface pressure as a Diagram 06: Wear, rotating with different shaft materials,
Wear resistance, page 54 Rotating Oscillating linear function of temperature (40MPa at +20°C) pressure, p = 1MPa, v = 0.3m/s
Long-term m/s 1.5 0.7 8.0
Shaft materials Short-term m/s 2.0 1.4 4.0 4 120
The friction and wear are also dependent, to a large degree, Table 03: Maximum surface speeds 100 rotating
on the mating partner. Shafts that are too smooth increase 3 80 oscillating
both the coefficient of friction and the wear of the bearing. Dry Greases Oil Water +23°C
+60°C
For iglidur M260 a ground surface with an average surface Coefficient of friction μ 0.08-0.16 0.09 0.04 0.04 2 60
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finish Ra = 0.8µm is recommended. Diagram 06 shows a Table 04: Coefficient of friction against steel (Ra = 1μm, 1 40
summary of the results of tests with different shaft materials 50HRC) Deformation [%] Wear [µm/km] 20
executed with plain bearings made of iglidur M260. It 0 0
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is important to notice that with increasing loads, the Housing Plain bearings Shaft 0.0 12.5 25.0 37.5 50.0 0 5 10 15 20 25 30 35 40
recommended hardness of the shaft increases. The "soft" Ø d1 [mm] H7 [mm] D11 [mm] h9 [mm] Load [MPa] Load [MPa]
shafts tend to wear more easily and thus increase the 0-3 +0.000 +0.010 +0.020 +0.080 -0.025 +0.000 Diagram 03: Deformation under pressure and temperature Diagram 07: Wear for oscillating and rotating applications
wear of the overall system, if the loads exceed 2MPa. The > 3-6 +0.000 +0.012 +0.030 +0.105 -0.030 +0.000 with shaft material Cf53 hardened and ground steel, as a
comparison of rotating and pivoting movements in diagram > 6-10 +0.000 +0.015 +0.040 +0.130 -0.036 +0.000 function of the load
07 makes it very clear that iglidur M260 plain bearings > 10-18 +0.000 +0.018 +0.050 +0.160 -0.043 +0.000 0.25
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are most suited for rotating operation. > 18-30 +0.000 +0.021 +0.065 +0.195 -0.052 +0.000
Shaft materials, page 56 > 30-50 +0.000 +0.025 +0.080 +0.240 -0.062 +0.000 0.20
> 50-80 +0.000 +0.030 +0.100 +0.290 -0.074 +0.000
> 80-120 +0.000 +0.035 +0.120 +0.340 -0.087 +0.000 Coefficient of friction [µ] 0.15
> 120-180 +0.000 +0.040 +0.145 +0.395 -0.100 +0.000
Table 05: Important tolerances for plain bearings according 0.10
to ISO 2795 after press-fit 0.05 0.10 0.15 0.20 0.25 0.30 0.35

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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