● Standard material for automotive industrial. Best and economic material for high temperature application. Excellent wear resistance is available in the vehicle fuels.
● Continuous working temperature: -40℃/+200℃
● High temperature and lower cost
● High wear resistance under fuel oil
● Good chemical resistance
● Suitable for humid environment
Material properties
Standard
Unit
CSB-EPB24
General properties
Color
-
-
Brown
Density
ISO1183
g/cm3
1.72
Max. moisture absorption, 50%RH
ISO62
%
0.1
Max. water absorption
ISO62
%
0.2
Coefficient of sliding friction(steel)
ITS025
µ
0.08-0.25
Max. PV value
ITS026
N/mm2×m/s
0.60
Mechanical properties
Flexural modulus
ISO178
MPa
10000
Flexural strength
ISO178
MPa
210
Max. static load
ITS027
MPa
110
Max. dynamic load
ITS028
MPa
58
Shore hardness
ISO868
D
81
Physical and thermal properties
Long-term application temperature
ITS029
℃
+200
Short-term application temperature
ITS029
℃
+240
Lowest application temperature
ITS029
℃
-40
Thermal conductivity
ISO22007
W/m/K
0.24
Coefficient of thermal expansion
ISO11359
K-1×10-5
5
Flammability
UL94
Class
V0
Electrical properties
Volume resistance
IEC60093
Ω·cm
>1013
Surface resistance
IEC60093
Ω
>1012
*ITS: CSB company's internal test standards. **Test temperatures are 23℃ unless otherwise stated.
The max PV value of the CSB-EPB24 plastic bearings is 0.6N/mm2×m/s which determines the load capacity of bearing is inversely proportional to the speed. Please refer to the chart for more detailed information (Graph EPB24-1).
▊ Load, speed and temperature
CSB-EPB24 allows the Max static load of 110Mpa, The max compressive deformation rate under the max load is listed in Graph EPB24-1, The actual load capacity of bearing is slightly less than 110Mpa, The bearing load is variable against the speed and temperature, Fast speed (Vmax: 1.0m/s) results into higher temperature (Tmax: 200℃) which decreases the load capacity of the bearing. Please refer to the Graph EPB24-3 for such variation.
▊ Friction factor, wear and shaft material
▊ Friction factor
Graph EPB24-4 shows the friction factor of CSB-EPB24 is not obviously effected by the operation speed when the loading is stable and Graph EPB24-5 shows it will be decreasing along with the loading is increased from 0 to 20 Mpa when the operation speed is unchanged, furthermore the friction factor will not be changed when the loading reaches 20Mpa upward. The friction factor of CSB-EPB24 is increased along with the increasing of the shaft roughness. The recommended shaft roughness is Ra0.1 to Ra0.6.
CSB-EPB24
Dry
Grease
Oil
Water
Friction coef. μ
0.08~0.25
0.09
0.04
0.04
▊ Wearing and shaft material
Graph EPB24-7 and Graph EPB24-8 tells that the CSB-EPB24 is very good for Hardened shaft and soft shaft and it features excellent both on hardened steel shaft and carbon steel shaft but the hardened chrome steel shaft is not good for CSB-EPB24 bearings. The wearing of CSB-EPB24 is better on oscillation operation than on rotation operation. The wearing will be increased when the loading is over 10Mpa.
▊ Chemical resistance
The Chemical Resistance of CSB-EPB24 is fairly good against most of Acid and Alkalis.
▊ Water absorption
The moisture absorption of CSB-EPB24 plastic plain bearings is 0.1% in standard atmosphere. The max. water absorption is 0.2% in water . These values are very low, CSB-EPB24 plastic palin bearings is very well suited for used in wet applications.
▊ UV resistance
Disintegration could be possible for the material CSB-EPB24 after long period of exposing under the UV ray and therefore the compressive strength will be reduced.
▊ Installation tolerances
CSB-EPB24 Tolerances after pressfit
Diameter [mm]
CSB-EPB24 F10 [mm]
Housing H7 [mm]
Shaft h9 [mm]
>0～3
+0.006～+0.046
0～+0.010
0～-0.025
>3～6
+0.010～+0.058
0～+0.012
0～-0.030
>6～10
+0.013～+0.071
0～+0.015
0～-0.036
>10～18
+0.016～+0.086
0～+0.018
0～-0.043
>18～30
+0.020～+0.104
0～+0.021
0～-0.052
>30～50
+0.025～+0.125
0～+0.025
0～-0.062
>50～80
+0.030～+0.150
0～+0.030
0～-0.074
>80～120
+0.036～+0.176
0～+0.035
0～-0.087
>120～180
+0.043～+0.203
0～+0.040
0～-0.100
Medium
EPB24 bearings resistance
Alcohol
Resistant
Hydrocarbons
Resistant
Greases. oils
Resistant
Fuels
Resistant
Diluted acids
Conditionally resistant
Strong acids
Conditionally resistant
Diluted alkalis
Resistant
Strong alkalis
Resistant
CSB® Bearing Material Chemical Resistance
Please select bearing material and medium...
R - Resistant
CR - Conditionally resistant
NR - Not resistant
ND - No test data
RD - Resistant，but the dimension changed due to moisture absorption
NO - No data
CSB® bearing material chemical resistance data is a comparison test result of the CSB chemistry laboratory using laboratory specimens or similar chemicals at room temperature 23 ℃, without considering the impact of other temperatures and chemical medium mixtures on the chemical resistance of CSB® bearing materials ; Therefore, this data can only act as a reference. CSB® recommends that the chemical resistance of actual parts should be tested under application conditions and verify the suitability of the bearings.
▊CSB-EPB® Plastic Bearings Finder[V2.1] is based on the analysis and calculation of a large number of test data in CSB® laboratory. You can calculations material data by entering parameters such as bearing load, speed, and temperature, and finally output material adaptation data. ▊Because the system calculate and analyze based on lab data, it can't exactly meet the ractual use requirements absolutly. The system data verification has certain limitations; CSB® recommends that the bearing must be tested again to verify whether it meets the actual use requirements. ▊CSB-EPB® Plastic Bearings Finder output data information is only for design reference, and can not be used as the final standard for determining the bearing material conformity, If you have any questions, please contact CSB® sales engineers.
CSB-SFP®
Semi-finished Products Finder V2.0
view tools
DURAPLAS® Semi-finished Products Finder V2.0
▊DURAPLAS® Semi-finished Products Finder[V2.0] is based on the analysis and calculation of a large number of test data in CSB® laboratory. You can calculations material data by entering parameters such as bearing load, speed, and temperature, and finally output material adaptation data. ▊Because the system calculate and analyze based on lab data, it can't exactly meet the ractual use requirements absolutly. The system data verification has certain limitations; CSB® recommends that the products must be tested again to verify whether it meets the actual use requirements. ▊DURAPLAS® Semi-finished Products Finder output data information is only for design reference, and can not be used as the final standard for determining the bearing material conformity, If you have any questions, please contact CSB® sales engineers.
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