Page 249 - IGUS Bearing

iglidur L500 iglidur L500
®
®
+250°C +250°C
70MPa 70MPa
Bearing technology | Plain bearings | iglidur L500 Technical data
®
Permissible surface speeds Chemicals Resistance 100.0 0.20
iglidur L500 has been developed especially for high Alcohols + 10.0 0.15
®
surface speeds with low loads. Due to the high temperature Diluted acids +
®
resistance of iglidur L500, the physical limit created from Diluted alkalines + 1.0 0.10
heating of the bearing has been increased significantly. Fuels +
In addition, the extremely low wear allows the high Greases, oils without additives + Surface pressure [MPa] 0.1 Coefficient of friction [µ] 0.05
acceleration speeds to be reached and maintained. The Hydrocarbons +
maximum speeds are shown in table 03. Strong acids + 0.01 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
Surface speed [m/s] Load [MPa]
All data given at room temperature [+20°C]
Temperature Diagram 01: Permissible pv values for iglidur L500 with a Diagram 05: Coefficient of friction as a function of the
®
®
iglidur L250 plain bearings can be used at temperatures up Table 02: Chemical resistance wall thickness of 1mm dry operation against a steel shaft at pressure, v = 0.01m/s
Chemical table, page 1170
to +315°C for short periods. For temperatures over +135°C +20°C, mounted in a steel housing
an additional securing is required. Higher temperatures Rotating Oscillating linear
can also cause the plain bearing to lose its press-fit and Long-term m/s 4.0 1.5 5.0 80 3.0
move in the hole. Short-term m/s 5.0 3.0 8.0 70 2.5
Application temperatures, page 53 60
Additional securing, page 53 Table 03: Maximum surface speeds 50 2.0
40 1.5
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 0.08-0.15 0.09 0.04 0.04 20 1.0 H.a. aluminium
The excellent coefficient of friction level of iglidur L500 in Table 04: Coefficient of friction against steel (Ra = 1μm, 10 Wear [µm/km] 0.5 Cf53 steel
®
dry operation decreases considerably with speed. Diagram Load [MPa] 0 0.0
04 shows this with respect to a steel shaft. As the load 50HRC) 20 50 80 120 150 200 250
increases, the coefficient of friction decreases, especially Housing Plain bearings Shaft Temperature [°C]
in the range up to 20MPa (diagram 05). 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,
Coefficient of friction and surfaces, page 51 0-3 +0.000 +0.010 +0.006 +0.046 -0.025 +0.000 function of temperature (70MPa at +20°C) pressure, p = 1MPa, v = 0.3m/s
Wear resistance, page 54
> 3-6 +0.000 +0.012 +0.010 +0.058 -0.030 +0.000
> 6-10 +0.000 +0.015 +0.013 +0.071 -0.036 +0.000 4.0 4
®
Shaft materials > 10-18 +0.000 +0.018 +0.016 +0.086 -0.043 +0.000 iglidur L500
Diagram 07 shows the result of a comparison test between > 18-30 +0.000 +0.021 +0.020 +0.104 -0.052 +0.000 3.0 3 Sinter bearing
iglidur L500 and a sintered bearing. The wear of the > 30-50 +0.000 +0.025 +0.025 +0.125 -0.062 +0.000 +23°C
®
+60°C
sintered bearing increases exponentially above 1.5m/s, > 50-80 +0.000 +0.030 +0.030 +0.150 -0.074 +0.000 2.0 2
while the iglidur L500 plain bearing retains a near constant > 80-120 +0.000 +0.035 -0.036 +0.176 -0.087 +0.000 1.0 1
®
wear rate up to and above 4m/s. > 120-180 +0.000 +0.040 +0.043 +0.203 +0.000 +0.100 Deformation [%] Wear [µm/km]
Shaft materials, page 56 0.0 0
Table 05: Important tolerances for plain bearings according 0 10 20 30 40 50 60 70 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0
to ISO 3547-1 after press-fit
Installation tolerances Load [MPa] Surface speed [m/s]
iglidur L500 plain bearings are standard bearings for Diagram 03: Deformation under pressure and temperature Diagram 07: Rotating wear against Cf53, p = 0.25MPa,
®
shafts with h tolerance (recommended minimum h9). T = +23°C
The bearings are designed for press-fit into a housing
machined to a H7 tolerance. After being assembled into a 0.20
nominal size housing, in standard cases the inner diameter 0.15
Coefficient of friction [µ]
automatically adjusts to the F10 tolerances. For particular
dimensions the tolerance differs depending on the wall 0.10
thickness (please see product range table).
Testing methods, page 61 0.05

0.00
0.5
0.0
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

246 3D-CAD, finder and service life calculation ... www.igus-asean.com/L500 Lubrication-free made easy ... from stock ... no minimum order quantity 247