● Self-lubricated material for high temperature up to 250 ℃. With its high chemical resistance feature, it coul be used inside most common chemical liquids. It is a high load material for the applications of high temperature and critical chemical environments
● Continuous working temperature: -100℃/+250℃
● Suitable for high load operation
● High load capacity at higher temperature
● Good chemical resistance
● Low water absorption
● High pressure resistance
Material properties
Standard
Unit
CSB-EPB5
General properties
Color
-
-
Black
Density
ISO1183
g/cm3
1.44
Max. moisture absorption, 50%RH
ISO62
%
0.1
Max. water absorption
ISO62
%
0.5
Coefficient of sliding friction(steel)
ITS025
µ
0.09-0.25
Max. PV value
ITS026
N/mm2×m/s
1.40
Mechanical properties
Flexural modulus
ISO178
MPa
4800
Flexural strength
ISO178
MPa
165
Max. static load
ITS027
MPa
110
Max. dynamic load
ITS028
MPa
61
Shore hardness
ISO868
D
82
Physical and thermal properties
Long-term application temperature
ITS029
℃
+250
Short-term application temperature
ITS029
℃
+315
Lowest application temperature
ITS029
℃
-100
Thermal conductivity
ISO22007
W/m/K
0.55
Coefficient of thermal expansion
ISO11359
K-1×10-5
6
Flammability
UL94
Class
V0
Electrical properties
Volume resistance
IEC60093
Ω·cm
>108
Surface resistance
IEC60093
Ω
>107
*ITS: CSB company's internal test standards. **Test temperatures are 23℃ unless otherwise stated.
The max PV value of the CSB-EPB5 plastic bearings is 1.4N/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 EPB5-1).
▊ Load, speed and temperature
CSB-EPB5 allows the Max static load of 110Mpa, The max compressive deformation rate under the max load is listed in Graph EPB5-2, The actual load capacity of bearing is slightly less than 110Mpa, The bearing load is variable against the speed and temperature, Fast speed (Vmax: 1.5m/s) results into higher temperature (Tmax: 250℃) which decreases the load capacity of the bearing. Please refer to the Graph EPB5-3 for such variation.
▊ Friction factor, wear and shaft material
▊ Friction factor
CSB-EPB5 Bearing Friction factor is increased along with the increasing of the operation speed under certain loading (See Graph EPB5-4). The friction factor of CSB-EP5 is decreased along with the loading increasing not over 20Mpa (see Graph EPB5-5). The friction factor will not change much along with the speed when the loading is over 20Mpa. The Graph EPB5-6 shows that the bearing could achieve its best performance when the counter shaft surface roughness is around Ra0.6 to Ra0.8.
CSB-EPB5
Dry
Grease
Oil
Water
Friction coef. μ
0.09~0.25
0.09
0.04
0.04
▊ Wearing and shaft material
Graph EPB5-7 and Graph EPB5-8 show the test results of the material CSB-EPB5 running against different shaft materials. It is suitable for stainless steel and hot rolled carbon steel shaft when the loading is less than 2Mpa and it will be more suitable for heat treated steel and carbon steel shaft when the loading is over 2Mpa. Graph EPB5-7 shows CSB-EPB5 is good for rotation operation. Specially, from the Graph EPB5-9, it is read that CSB-EPB5 is with better performance under high temperature around 150℃ comparing with under the ambient temperature of 23℃.
▊ Chemical resistance
Chemical Resistance of CSB-EPB5 is very good. It can work well in the heavy acid of 65%.
▊ Water absorption
The moisture absorption of CSB-EPB5 plastic plain bearings is 0.1% in standard atmosphere. The max. water absorption is 0.5% in water . These values are very low, CSB-EPB5 plastic palin bearings is very well suited for used in wet applications.
▊ UV resistance
CSB-EPB5 can maintain its performance to be stable even exposed in the UV ray for long period.
▊ Installation tolerances
CSB-EPB5 Tolerances after pressfit
Diameter [mm]
CSB-EPB5 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
EPB5 bearings resistance
Alcohol
Resistant
Hydrocarbons
Resistant
Greases. oils
Resistant
Fuels
Resistant
Diluted acids
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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