● Good wear resistance under extremely high load condition. It is suitable for the applications that the other CSB plastic bearing materials are not working properly with the extremely high load and oscillation motion conditions
● Continuous working temperature: -40℃/+150℃
● Suitable for high load operation
● Good for oscillating operation
● Comtainment prevention ability
Material properties
Standard
Unit
CSB-EPB22
General properties
Color
-
-
Light brown
Density
ISO1183
g/cm3
1.49
Max. moisture absorption, 50%RH
ISO62
%
1.1
Max. water absorption
ISO62
%
4.6
Coefficient of sliding friction(steel)
ITS025
µ
0.15-0.35
Max. PV value
ITS026
N/mm2×m/s
0.70
Mechanical properties
Flexural modulus
ISO178
MPa
9000
Flexural strength
ISO178
MPa
240
Max. static load
ITS027
MPa
95
Max. dynamic load
ITS028
MPa
49
Shore hardness
ISO868
D
80
Physical and thermal properties
Long-term application temperature
ITS029
℃
+150
Short-term application temperature
ITS029
℃
+220
Lowest application temperature
ITS029
℃
-40
Thermal conductivity
ISO22007
W/m/K
0.24
Coefficient of thermal expansion
ISO11359
K-1×10-5
8
Flammability
UL94
Class
HB
Electrical properties
Volume resistance
IEC60093
Ω·cm
>1013
Surface resistance
IEC60093
Ω
>1011
*ITS: CSB company's internal test standards. **Test temperatures are 23℃ unless otherwise stated.
The max PV value of the CSB-EPB12 plastic bearings is 0.7N/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 EPB12-1).
▊ Load, speed and temperature
CSB-EPB22 allows the Max static load of 95Mpa, The max compressive deformation rate under the max load is listed in Graph EPB22-2, The actual load capacity of bearing is slightly less than 95Mpa, The bearing load is variable against the speed and temperature, Fast speed (Vmax: 1.0m/s) results into higher temperature (Tmax: 150℃) which decreases the load capacity of the bearing. Please refer to the Graph EPB22-3 for such variation.
▊ Friction factor, wear and shaft material
▊ Friction factor
Graph EPB22-4 shows that the friction factor of CSB-EPB22 is not considerably affected by the operation speed when the loading is stable. At the meantime, Graph EPB22-5 shows that the friction factor of CSB-EPB22 is not considerably affected by the loading when the operation speed is stable. This bearing is the only typical material whose friction factor is not sensitive to the operation speed and loading. Graph EPB22-6 tells that the fiction factor of CSB-EPB22 will not be affected by the shaft roughness when the shaft roughness is better than Ra0.4. The recommended Shaft roughness is Ra0.1~0.4.
CSB-EPB22
Dry
Grease
Oil
Water
Friction coef. μ
0.15~0.35
0.09
0.04
0.04
▊ Wearing and shaft material
Graph EPB22-7 and Graph EPB22-8 tells that CSB-EPB22 is suitable for both hard chrome steel shaft and hardened steel shaft. The wearing feature of CSB-EPB22 is better in oscillation operation than in rotation operation. Hardened steel shaft and hardened aluminum shaft is the better choice under oscillation operation and hardened steel shaft and hardened chrome steel shaft is the better choice under rotation operation.
▊ Chemical resistance
CSB-EPB22 is good at chemical resistance against weak acidic medium and various kinds of lubricants.
▊ Water absorption
The moisture absorption of CSB-EPB22 plastic plain bearings is 1.1% in standard atmosphere. The max. water absorption is 4.6% in water. The application environment has to be considered due to the high water absorbtion properties.
▊ UV resistance
CSB-EPB22 can become brittle and lost its impact resistance when it is exposed into UV ray for a certain period of time.
▊ Installation tolerances
CSB-EPB22 Tolerances after pressfit
Diameter [mm]
CSB-EPB22 E10 [mm]
Housing H7 [mm]
Shaft h9 [mm]
>0～3
+0.014～+0.054
0～+0.010
0～-0.025
>3～6
+0.020～+0.068
0～+0.012
0～-0.030
>6～10
+0.025～+0.083
0～+0.015
0～-0.036
>10～18
+0.032～+0.102
0～+0.018
0～-0.043
>18～30
+0.040～+0.124
0～+0.021
0～-0.052
>30～50
+0.050～+0.150
0～+0.025
0～-0.062
>50～80
+0.060～+0.180
0～+0.030
0～-0.074
>80～120
+0.072～+0.212
0～+0.035
0～-0.087
>120～180
+0.085～+0.245
0～+0.040
0～-0.100
Medium
EPB22 bearings resistance
Alcohol
Resistant
Hydrocarbons
Resistant
Greases. oils
Resistant
Fuels
Resistant
Diluted acids
Conditionally resistant
Strong acids
Not resistant
Diluted alkalis
Resistant
Strong alkalis
Conditionally 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.
● Maintenance-free, dry operation ● Static load 240MPa,dynamic load 120MPa ● Working temperature -196/+160℃ ● Resistant to dirt and dust ● Internal bore can be precision-finished
Good wear resistance material suitable for high load and oscilation motions. It is an economic solution for high load applications. Continuous working temperature: -40℃/+135℃. Suitable for high load operation...
