● High temperature material with good chemical resistance feature. It could be continously used under the temperature of 200 ℃, it is also suitable to be used in the humid environment and even inside the chemical liquids. It is best to be used against hard materials
● Continuous working temperature: -40℃/+200℃
Suitable for medium and high load operation
● Maintenance-free dry operation
● Good chemical resistance
● Suitable for humid environment
Material properties
Standard
Unit
CSB-EPB4
General properties
Color
-
-
Black
Density
ISO1183
g/cm3
1.70
Max. moisture absorption, 50%RH
ISO62
%
0.1
Max. water absorption
ISO62
%
0.3
Coefficient of sliding friction(steel)
ITS025
µ
0.07-0.20
Max. PV value
ITS026
N/mm2×m/s
1.35
Mechanical properties
Flexural modulus
ISO178
MPa
12000
Flexural strength
ISO178
MPa
165
Max. static load
ITS027
MPa
90
Max. dynamic load
ITS028
MPa
50
Shore hardness
ISO868
D
82
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
0.60
Coefficient of thermal expansion
ISO11359
K-1×10-5
4
Flammability
UL94
Class
V0
Electrical properties
Volume resistance
IEC60093
Ω·cm
>105
Surface resistance
IEC60093
Ω
>105
*ITS: CSB company's internal test standards. **Test temperatures are 23℃ unless otherwise stated.
The max PV value of the CSB-EPB4 plastic bearings is 1.35N/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 EPB4-1).
▊ Load, speed and temperature
CSB-EPB4 allows the Max static load of 90Mpa, The max compressive deformation rate under the max load is listed in Graph EPB4-2, The actual load capacity of bearing is slightly less than 90Mpa, 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 EPB4-3 for such variation.
▊ Friction factor, wear and shaft material
▊ Friction factor
Friction factor will be slightly decreased along with the speed increasing under certain loading of the rotation operation (see Graph EPB4-4) and it will be slightly decreased along with the loading increasing under certain speed of the rotation operation especially when the loading is less than 30Mpa. Graph EPB4-5 tells that the friction of the CSB-EPB4 is not changed at all when the shaft roughness is between Ra0.1 to Ra0.4 and will be considerably increased when the shaft roughness is over Ra0.4. So the recommended shaft roughness is Ra0.1-Ra0.4.
CSB-EPB4
Dry
Grease
Oil
Water
Friction coef. μ
0.07~0.20
0.09
0.04
0.04
▊ Wearing and shaft material
Graph EPB4-7 shows that CSB-EPB4 is suitable for most of the shaft materials under low loading rotation operation and it is good for hardened carbon steel shaft under high loading rotation operation (see Graph EPB4- 8). CSB-EPB4 is suitable for stainless steel shaft under oscillation operation and good for hot rolled carbon steel and hardened carbon steel shaft under rotation operation.
▊ Chemical resistance
The Chemical Resistance of CSB-EPB4 is fairly good against most of Acid and Alkalis.
▊ Water absorption
The moisture absorption of CSB-EPB4 plastic plain bearings is 0.1% in standard atmosphere. The max. water absorption is 0.3% in water . These values are very low, CSB-EPB4 plastic palin bearings is very well suited for used in wet applications.
▊ UV resistance
Disintegration could be possible for the material CSB-EPB4 after long period of exposing under the UV ray and therefore the compressive strength will be reduced.
▊ Installation tolerances
CSB-EPB4 Tolerances after pressfit
Diameter [mm]
CSB-EPB4 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
EPB4 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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