Page 622 - IGUS Bearing

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iglidur iglidur
RW370 RW370
+170°C +170°C
75MPa 75MPa
Bearing technology | Plain bearings | iglidur RW370 Technical data
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Permissible surface speeds Installation tolerances 100.0 12
Although the typical applications of iglidur RW370 plain iglidur RW370 plain bearings are standard bearings for 10.0 10
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bearings are generally in the area of intermittent operation, shafts with h-tolerance (recommended minimum h9). 8
the maximum attainable speeds can be quite high, The bearings are designed for press-fit into a housing 1.0 6
depending on the type of motion. The speeds stated in machined to a H7 tolerance. After being assembled into a 4 H.a. aluminium Free cutting steel Cf53, hard chromed HR carbon steel 304 stainless steel High grade steel
table 03 are limit values for the lowest bearing loads. With nominal size housing, in standard cases the inner diameter Surface pressure [MPa] 0.1 2 Cf53 steel
higher loads, the permitted speed drops with the extent of automatically adjusts to the F10 tolerances. For particular Wear [µm/km]
the load due to the limitations by the pv value. dimensions the tolerance differs depending on the wall 0.01 0.001 0.01 0.1 1.0 10.0 0
Surface speed, page 48 thickness (please see product range table).
Testing methods, page 61 Surface speed [m/s]
Temperature Diagram 01: Permissible pv values for iglidur RW370 with a Diagram 05: Wear, rotating with different shaft materials,
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The short-term permissible temperature limit is +190°C, wall thickness of 1mm dry operation against a steel shaft at pressure, p = 1MPa, v = 0.3m/s
which allows the use of iglidur RW370 plain bearings in Chemicals Resistance +20°C, mounted in a steel housing
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all applications involving elevated ambient temperatures. Alcohols + up to 0
With increasing temperatures, the compressive strength Diluted acids + 80 500
of iglidur RW370 plain bearings decreases. When Diluted alkalines + rotating
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oscillating
considering temperatures, the additional frictional heat Fuels + up to 0 60 400
in the bearing system must be taken into account. For Greases, oils without additives + 300
temperatures over +120°C an additional securing is Hydrocarbons – 40 200
required. Strong acids – 20
Application temperatures, page 53 Strong alkalines – Wear [µm/km] 100
Additional securing, page 53 All data given at room temperature [+20°C] Load [MPa] 0 0
Table 02: Chemical resistance 20 50 80 120 150 0 20 40 60 80
Friction and wear Chemical table, page 1170 Temperature [°C]
The excellent coefficient of friction level of iglidur RW370 in Diagram 02: Maximum recommended surface pressure as a Diagram 06: Wear for oscillating and rotating applications
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dry operation decreases with speed, to a value of 1.1m/s. Rotating Oscillating linear function of temperature (75MPa at +20°C) with shaft material Cf53 hardened and ground steel, as a
Diagram 04 shows this with respect to a steel shaft. Above Long-term m/s 0.9 0.6 2.5 function of the load
a speed of 1.25 m/s the coefficient of friction increases Short-term m/s 1.0 0.8 2.6 4.5
significantly as the load limit of the material is reached. Table 03: Maximum surface speeds 4.0
Coefficient of friction and surfaces, page 51 3.5 +23°C
3.0
Wear resistance, page 54 Dry Greases Oil Water 2.5 +60°C
Coefficient of friction μ 0.13-0.17 0.09 0.04 0.04 2.0
Shaft materials Table 04: Coefficient of friction against steel (Ra = 1μm, 1.5
Diagram 06 and 07 display a summary of the test results 50HRC) Deformation [%] 1.0
0.5
with different shaft materials conducted with plain bearings 0.0
made from iglidur RW370. At a surface pressure of 0.3m/s Housing Plain bearings Shaft 0 25 50 75
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and 1MPa, shafts made of hard-anodised aluminium and Ø d1 [mm] H7 [mm] F10 [mm] h9 [mm] Load [MPa]
hard-chromed Cf53 are the most suitable glide surfaces. 0-3 +0.000 +0.010 +0.006 +0.046 -0.025 +0.000 Diagram 03: Deformation under pressure and temperature
Shafts made from 304 stainless steel or high grade steel > 3-6 +0.000 +0.012 +0.010 +0.058 -0.030 +0.000
also show good results. If the shaft material you plan on > 6-10 +0.000 +0.015 +0.013 +0.071 -0.036 +0.000
using is not shown in these test results, please contact us. > 10-18 +0.000 +0.018 +0.016 +0.086 -0.043 +0.000 0.70
Shaft materials, page 56 > 18-30 +0.000 +0.021 +0.020 +0.104 -0.052 +0.000 0.60
> 30-50 +0.000 +0.025 +0.025 +0.125 -0.062 +0.000 0.50
> 50-80 +0.000 +0.030 +0.030 +0.150 -0.074 +0.000 0.40
> 80-120 +0.000 +0.035 -0.036 +0.176 -0.087 +0.000 Coefficient of friction [µ] 0.30
> 120-180 +0.000 +0.040 +0.043 +0.203 +0.000 +0.100 0.20
Table 05: Important tolerances for plain bearings according 0.10
0.00
to ISO 3547-1 after press-fit 0.00 0.25 0.50 0.75 1.00 1.25 1.50
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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