● It is a wear resistance material for working temperature lower than 80℃. The application is for the condition where the shaft hardness is not critical. The white color of the material is also commonly used for most of the clearing and packing machineries
● Continuous working temperature: -40℃/+80℃
● No special requirement on the surface roughness
● Low friction coefficient
● Applicable for soft shaft
Material properties
Standard
Unit
CSB-EPB6
General properties
Color
-
-
White
Density
ISO1183
g/cm3
1.45
Max. moisture absorption, 50%RH
ISO62
%
0.3
Max. water absorption
ISO62
%
1.2
Coefficient of sliding friction(steel)
ITS025
µ
0.05-0.18
Max. PV value
ITS026
N/mm2×m/s
0.30
Mechanical properties
Flexural modulus
ISO178
MPa
2300
Flexural strength
ISO178
MPa
60
Max. static load
ITS027
MPa
35
Max. dynamic load
ITS028
MPa
14
Shore hardness
ISO868
D
74
Physical and thermal properties
Long-term application temperature
ITS029
℃
+80
Short-term application temperature
ITS029
℃
+120
Lowest application temperature
ITS029
℃
-40
Thermal conductivity
ISO22007
W/m/K
0.20
Coefficient of thermal expansion
ISO11359
K-1×10-5
10
Flammability
UL94
Class
HB
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-EPB6 plastic bearings is 0.3N/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 EPB6-1).
▊ Load, speed and temperature
CSB-EPB6 allows the Max static load of 35Mpa, The max compressive deformation rate under the max load is listed in Graph EPB6-2, The actual load capacity of bearing is slightly less than 35Mpa, The bearing load is variable against the speed and temperature, Fast speed (Vmax: 1.0m/s) results into higher temperature (Tmax: 80℃) which decreases the load capacity of the bearing. Please refer to the Graph EPB6-3 for such variation.
▊ Friction factor, wear and shaft material
▊ Friction factor
Graph EPB6-4 shows the CSB-EPB6 friction factor is slightly increased as long as the operation speed increasing when the loading is relatively stable. Graph EPB6-5 shows the friction factor of CSB-EPB6 is continuing decreasing along with the loading increasing when the operation speed is relatively stable. From Graph EPB6-6, it is found that the friction factor is also variable against the shaft surface roughness. The recommended shaft surface roughness is Ra0.3~0.6.
CSB-EPB6
Dry
Grease
Oil
Water
Friction coef. μ
0.05~0.18
0.09
0.04
0.04
▊ Wearing and shaft material
Graph EPB6-7 and Graph EPB6-8 describes CSB-EPB6 bearing is suitable for hardened steel and hardened chrome steel shaft. CSB-EPB6 is very similar during its rotation operation and oscillation operation so that this material is suitable for most of the applications.
▊ Chemical resistance
CSB-EPB6 is good at chemical resistance against mild base, weak acidic medium and various kinds of lubricants.
▊ Water absorption
The moisture absorption of CSB-EPB6 plastic bearings is 0.3% in standard atmosphere. The max. water absorption is 1.2% in water. These values are so low that design changes due to absorption are only necessary in extreme applications.
▊ UV resistance
CSB-EPB6 can maintain its color unchanged when it is exposed into the UV ray. The hardness, Compressive strength and wear resistance of the material is also stable under such condition.
▊ Installation tolerances
CSB-EPB6 Tolerances after pressfit
Diameter [mm]
CSB-EPB6 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
EPB6 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.
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