Page 240 - IGUS Bearing

iglidur L350 iglidur L350
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+180 °C +180 °C
59MPa 59MPa
Bearing technology | Plain bearings | iglidur L350 Technical data
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Permissible surface speeds Chemicals Resistance 100.0 5 iglidur L350
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iglidur L350 has been developed especially for high Alcohols + 10.0 4 iglidur L500
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surface speeds with low loads. Due to the high temperature Diluted acids + 3 Sintered
bearing
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resistance of iglidur L350, the physical limit created from Diluted alkalines + 1.0
heating of the bearing has been increased significantly. In Fuels + 2
addition, the extremely low wear allows the high acceleration Greases, oils without additives + Surface pressure [MPa] 0.1 Wear rate [µm/km] 1
speeds to be reached and maintained. The maximum Hydrocarbons + up to 0
speeds are shown in table 03. Strong acids + 0.01 0.001 0.01 0.1 1.0 10.0 0
Surface speed, page 48 Strong alkalines + 0 1 2 3 4
Surface speed [m/s] Surface speed [m/s]
All data given at room temperature [+20°C]
Temperature Diagram 01: Permissible pv values for iglidur L350 with a Diagram 05: Rotating wear against Cf53, p = 0.25MPa,
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The iglidur L350 plain bearings can be used at temperatures Table 02: Chemical resistance wall thickness of 1mm dry operation against a steel shaft at T = +23°C
Chemical table, page 1170
up to +210°C for short periods. Note that a mechanical +20°C, mounted in a steel housing
securing of the bearing is recommended from temperatures Rotating Oscillating linear
of +140°C. Higher temperatures can also cause the plain Long-term m/s 3.0 1.5 4.0 80 1.8
bearing to lose its press-fit and move in the hole. Short-term m/s 4.0 3.0 6.0 70 1.5
Application temperatures, page 53 60
Additional securing, page 53 Table 03: Maximum surface speeds 50 1.2
40 0.9
Dry Greases Oil Water 30 Free cutting steel Cf53, hard chromed HR carbon steel 304 stainless steel High grade steel
Friction and wear Coefficient of friction μ 0.07-0.18 0.06 0.04 0.03 20 0.6 H.a. aluminium
The very low coefficient of friction remains, even at high Table 04: Coefficient of friction against steel (Ra = 1μm, 10 Wear [µm/km] 0.3 Cf53 steel
speeds. Diagram 04 shows this relationship on a steel Load [MPa] 0 0.0
shaft at 0.75MPa surface pressure. 50HRC) 20 40 60 80 100 120 140 160 180
Coefficient of friction and surfaces, page 51 Housing Plain bearings Shaft Temperature [°C]
Wear resistance, page 54 Diagram 02: Maximum recommended surface pressure as a Diagram 06: Wear, rotating with different shaft materials,
Ø d1 [mm] H7 [mm] F10 [mm] h9 [mm]
function of temperature (59MPa at +20°C) p = 1MPa, v = 0.3m/s
0-3 +0.000 +0.010 +0.006 +0.046 -0.025 +0.000
Shaft materials > 3-6 +0.000 +0.012 +0.010 +0.058 -0.030 +0.000
Diagram 05 compares the wear of a sintered bearing with > 6-10 +0.000 +0.015 +0.013 +0.071 -0.036 +0.000 4.0 0.20
that of bearings made of the materials iglidur L500 and > 10-18 +0.000 +0.018 +0.016 +0.086 -0.043 +0.000 iglidur L350
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L350. At a surface speed of 1.5m/s or more, the wear of > 18-30 +0.000 +0.021 +0.020 +0.104 -0.052 +0.000 3.0 0.15 iglidur L500
the sintered bearing increases exponentially whereas the > 30-50 +0.000 +0.025 +0.025 +0.125 -0.062 +0.000 +23°C
+60°C
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wear of the iglidur plain bearings almost remains the same > 50-80 +0.000 +0.030 +0.030 +0.150 -0.074 +0.000 2.0 0.10
up to a speed of more than 3m/s. > 80-120 +0.000 +0.035 -0.036 +0.176 -0.087 +0.000 1.0 Coefficient of friction [µ] 0.05
Shaft materials, page 56 Deformation [%]
> 120-180 +0.000 +0.040 +0.043 +0.203 +0.000 +0.100
Table 05: Important tolerances for plain bearings according 0.0 0.00
Installation tolerances 0 10 20 30 40 50 60 1.0 1.5 2.0 2.5 3.0 3.5 4.0
iglidur L350 plain bearings are standard bearings for to ISO 3547-1 after press-fit Load [MPa] Surface speed [m/s]
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shafts with h tolerance (recommended minimum h9). Diagram 03: Deformation under pressure and temperature Diagram 07: Rotating coefficient of friction - "High speed"
The bearings are designed for press-fit into a housing against Cf53, p = 1 MPa (except for iglidur L250), T = +23°C
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machined to a H7 tolerance. After being assembled into a
nominal size housing, in standard cases the inner diameter 0.20
automatically adjusts to the F10 tolerances. For particular 0.15
Coefficient of friction [µ] 0.05
dimensions the tolerance differs depending on the wall
thickness (please see product range table). 0.10
Testing methods, page 61

0.00
0.0
0.5
Surface speed [m/s] 1.0 1.5 2.0 2.5 3.0
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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