● An excellent self-lubricated material suitable for impact resistance applications which is widedly used under the evironment of impact absorbing and weare resistance requirement
● Continuous working temperature: -40℃/+80℃
● High load capacity, Impact resistance
● Low cost
● Dry operation and maintenance free
● Good for Marginal Load
● Suitable for low speed operation
Material properties
Standard
Unit
CSB-EPB3M
General properties
Color
-
-
Dark grey
Density
ISO1183
g/cm3
1.14
Max. moisture absorption, 50%RH
ISO62
%
1.4
Max. water absorption
ISO62
%
7.6
Coefficient of sliding friction(steel)
ITS025
µ
0.09-0.30
Max. PV value
ITS026
N/mm2×m/s
0.15
Mechanical properties
Flexural modulus
ISO178
MPa
2700
Flexural strength
ISO178
MPa
100
Max. static load
ITS027
MPa
30
Max. dynamic load
ITS028
MPa
15
Shore hardness
ISO868
D
79
Physical and thermal properties
Long-term application temperature
ITS029
℃
+80
Short-term application temperature
ITS029
℃
+170
Lowest application temperature
ITS029
℃
-40
Thermal conductivity
ISO22007
W/m/K
0.24
Coefficient of thermal expansion
ISO11359
K-1×10-5
10
Flammability
UL94
Class
HB
Electrical properties
Volume resistance
IEC60093
Ω·cm
>1012
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-EPB3M plastic bearings is 0.15N/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 EPB3M-1).
▊ Load, speed and temperature
CSB-EPB3M allows the Max static load of 30Mpa, The max compressive deformation rate under the max load is listed in Graph EPB3M-2, The actual load capacity of bearing is slightly less than 30Mpa, The bearing load is variable against the speed and temperature, Fast speed (Vmax: 0.8m/s) results into higher temperature (Tmax: 80℃) which decreases the load capacity of the bearing. Please refer to the Graph EPB3M-3 for such variation.
▊ Friction factor, wear and shaft material
▊ Friction factor
CSB-EPB3M Bearing Friction factor is increased along with the increasing of the operation speed (See Graph EPB3M-4) therefore it is suitable for the application under low speed operation. The friction factor of CSB-EP3M is decreased along with the loading increasing (see Graph EPB3M-5). The friction factor and wearing of the bearing is considerably affected by the counter shaft roughness. The Graph EPB3M-6 shows that the bearing could achieve its best performance when the counter shaft surface roughness is around Ra0.6.
CSB-EPB3M
Dry
Grease
Oil
Water
Friction coef. μ
0.09~0.30
0.09
0.04
0.04
▊ Wearing and shaft material
Test of the bearing against various shaft materials shows that the material CSB-EPB3M features the wearing performance of the material is not sensitive with different materials where the loading is over 2Mpa. (See Graph EPB3M-7). The bearing performance remains the best when the loading is in the lower range. When the loading is increased, the wearing will be sharply increased. From the Graph EPB3M-8, the CSB-EPB3M material is better for the application with the counter shaft material of hard chrome steel. Graph EPB3M-7 shows that the material is better for rotation operation than oscillation operation.
▊ Chemical resistance
CSB-EPB3M is good at chemical resistance against weak acidic medium and various kinds of lubricants.
▊ Water absorption
The moisture absorption of CSB-EPB3M plastic plain bearings is 1.4% in standard atmosphere. The max. water absorption is 7.6% in water. The application environment has to be considered due to the high water absorbtion properties.
▊ UV resistance
CSB-EPB3M can maintain its color unchanged when it is exposed into the UV ray. The material performance stays stable.
▊ Installation tolerances
CSB-EPB3M Tolerances after pressfit
Diameter [mm]
CSB-EPB3M D11 [mm]
Housing H7 [mm]
Shaft h9 [mm]
>0～3
+0.020～+0.080
0～+0.010
0～-0.025
>3～6
+0.030～+0.105
0～+0.012
0～-0.030
>6～10
+0.040～+0.130
0～+0.015
0～-0.036
>10～18
+0.050～+0.160
0～+0.018
0～-0.043
>18～30
+0.065～+0.195
0～+0.021
0～-0.052
>30～50
+0.080～+0.240
0～+0.025
0～-0.062
>50～80
+0.100～+0.290
0～+0.030
0～-0.074
>80～120
+0.120～+0.340
0～+0.035
0～-0.087
>120～180
+0.145～+0.395
0～+0.040
0～-0.100
Medium
EPB3M 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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