Page 159 - IGUS Bearing

iglidur GLW iglidur GLW
®
®
+100°C +100°C
80MPa 80MPa
Bearing technology | Plain bearings | iglidur GLW Technical data
®
Permissible surface speeds Product range 100.0
iglidur GLW has been developed for low to medium iglidur GLW plain bearings are manufactured to special order. 10.0
®
®
surface speeds. During continuous operation, a maximum For high volume applications, please request iglidur GLW
®
speed of 0.8m/s (rotating) or 2.5m/s (linear) is permissible. plain bearings as an alternative to iglidur G. 1.0
®
The maximum values shown in table 03 can only be
achieved at low pressures. In practice, these values Surface pressure [MPa] 0.1 Coefficient of friction [µ]
are rarely reached, due to the increasing temperatures Chemicals Resistance
approaching or exceeding the maximum permitted value. Alcohols + up to 0 0.01 0.001 0.01 0.1 1.0 10.0
Surface speed, page 48 Diluted acids 0 up to –
Diluted alkalines + Surface speed [m/s] Load [MPa]
Temperature Fuels + Diagram 01: Permissible pv values for iglidur GLW with a Diagram 05: Coefficient of friction as a function of the
®
The ambient temperatures strongly influence the properties Greases, oils without additives + wall thickness of 1mm dry operation against a steel shaft at pressure, v = 0.01m/s
of plain bearings. Diagram 02 shows this inverse Hydrocarbons + +20°C, mounted in a steel housing
relationship. The wear rises with increasing temperatures. Strong acids –
For temperatures over +80°C an additional securing is Strong alkalines 0 120 100
required. All data given at room temperature [+20°C] 100 30
Application temperatures, page 53 Table 02: Chemical resistance 25
Additional securing, page 53 Chemical table, page 1170 80 20
60
15 Free cutting steel Cf53, hard chromed 304 stainless steel
Friction and wear Rotating Oscillating linear 40 10 H.a. aluminium HR carbon steel High grade steel
Similar to wear resistance, the coefficient of friction µ also Long-term m/s 0.8 0.6 2.5 20 Wear [µm/km] 5 Cf53 steel
changes with the surface speed and load (diagrams 04 Short-term m/s 1.0 0.7 3.0 Load [MPa] 0 0
and 05). Table 03: Maximum surface speeds 20 30 40 50 60 70 80 90 100
Coefficient of friction and surfaces, page 51 Temperature [°C]
Wear resistance, page 54 Dry Greases Oil Water Diagram 02: Maximum recommended surface pressure as a Diagram 06: Wear, rotating with different shaft materials,
Coefficient of friction μ 0.10-0.24 0.09 0.04 0.04 function of temperature (80MPa at +20°C) pressure, p = 1MPa, v = 0.3m/s
Shaft materials Table 04: Coefficient of friction against steel (Ra = 1μm,
The friction and wear are also dependent, to a large 50HRC) 10
degree, on the mating partner. Shafts that are too smooth
increase both the coefficient of friction and the wear of the Housing Plain bearings Shaft 8 +23°C
bearing. For iglidur GLW a ground surface with an average Ø d1 [mm] H7 [mm] E10 [mm] h9 [mm] 6 +60°C
®
surface finish Ra = 0.1-0.2µm is recommended. Diagram 0-3 +0.000 +0.010 +0.014 +0.054 -0.025 +0.000 4
06 shows results of testing different shaft materials with > 3-6 +0.000 +0.012 +0.020 +0.068 -0.030 +0.000
plain bearings made from iglidur GLW. If the shaft material > 6-10 +0.000 +0.015 +0.025 +0.083 -0.036 +0.000 Deformation [%] 2
®
you plan on using is not shown in these test results, please > 10-18 +0.000 +0.018 +0.032 +0.102 -0.043 +0.000 0
contact us. > 18-30 +0.000 +0.021 +0.040 +0.124 -0.052 +0.000 0 10 20 30 40 50 60 70 80
Shaft materials, page 56 > 30-50 +0.000 +0.025 +0.050 +0.150 -0.062 +0.000 Load [MPa]
> 50-80 +0.000 +0.030 +0.060 +0.180 -0.074 +0.000 Diagram 03: Deformation under pressure and temperature
Installation tolerances > 80-120 +0.000 +0.035 +0.072 +0.212 -0.087 +0.000
iglidur GLW plain bearings are standard bearings for > 120-180 +0.000 +0.040 +0.085 +0.245 -0.100 +0.000
®
shafts with h-tolerance (recommended minimum h9). The Table 05: Important tolerances for plain bearings according 0.35
bearings are designed for press-fit into a housing machined to ISO 3547-1 after press-fit 0.30
to a H7 tolerance. After being assembled into a nominal
size housing, the inner diameter automatically adjusts to 0.25
the E10 tolerances. For particular dimensions the tolerance Coefficient of friction [µ]
differs depending on the wall thickness (please see product 0.20
range table).
Testing methods, page 61 0.15 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

156 3D-CAD, finder and service life calculation ... www.igus-asean.com/GLW Lubrication-free made easy ... from stock ... no minimum order quantity 157