CSB Plastic is one of the leading China epb5a plastic plain bearings manufacturers and suppliers, and also a professional plastic low friction bearings factory and company, we are always at your services.


EPB5A Plastic Plain Bearings


● Continuous working temperature: -100℃～250℃;


● Suitable for high load and lovo speed operation;


● High load capacity at higher temperature;


● Good chemical resistance;


● FDA grade.


The Material Data Sheet






Typical Item




Standard




Unit




CSB-EPB5A






? ?Density




ISO1183




g/cm3




1.50






? ?Color






Grey






? ?Dynamic friction /steel(dry)






0.10-0.25






? ?Max. PV (dry)





N/mm2×m/s




0.9






? ?Max. roatating velocity





m/s




0.6






? ?Max. oscillating velocity





m/s




0.4






? ?Max. linear velocity





m/s




1.0






? ?Tensile strength




ISO527




MPa




150






? ?Compressive strength (Axial)





MPa




100






? ?E-module




ISO527




MPa




7900






? ?Max. static pressure of the surface, 20℃





MPa




120






??Shore hardness




ISO868




D




83






? ?Continuous work temperature





℃




-100/250






? ?Short-time work temperature





℃




-100/315






? ?Thermal conductivity




ASTME1461




W/m×k




0.6






? ?Linear coef. of thermal expansion




ASTMD696




K-1×10-5




6






? ?Moisture absorption RH50/23℃




ASTMD570




%




0.1





? ?Max. water absorption, 23℃



%


0.5





? ?Flammability




UL94





V0






? ?Volume resistivity




IEC60093




Ωcm




>1015






? ?Surface resistivity




IEC60093




Ω




>1015






PV Value of Bearings


The max PV value of the CSB-EPB5A series bearing is 0.9N/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 EPB5A-1).





The Relation of Load, Speed and Temperature


CSB-EPB5A allows the Max static load of 120Mpa, The max compressive deformation rate under the max load is listed in Graph EPB5A-2, The actual load capacity of bearing is slightly less than 120Mpa, The bearing load is variable against the speed and temperature, Fast speed (Vmax: 0.6m/s) results into higher temperature (Tmax: 250℃) which decreases the load capacity of the bearing. Please refer to the Graph EPB5A-3 for such variation.








The Friction Factor,Wearing and shaft material


Friction Factor?CSB-EPB5A Bearing Friction factor is increased along with the increasing of the operation speed under certain loading (See Graph EPB5A-4). The friction factor of CSBEP5A is decreased along with the loading increasing not over 20Mpa (see Graph EPB5A-5). The friction factor will not change much along with the speed when the loading is over 20Mpa. The Graph EPB5A-6 shows that the bearing could achieve its best performance when the counter shaft surface roughness is around Ra0.4 to Ra0.9.





CSB-EPB5A


Dry


Grease


Oil


Water




Friction coef.?μ


0.09~0.25


0.09


0.04


0.04








Wearing and shaft material


Graph EPB5A-7 and Graph EPB5A-8 show the test results of the material CSB-EPB5A running against different shaft materials. It is suitable for hard Aluminum and hard chrome steel shaft. The hard chrome steel shaft will be better when the loading is getting heavier. Graph EPB5A-7 shows CSB-EPB5A is good for oscillation operation. Specially, from the Graph EPB5A-8, it is read that CSB-EPB5A is with better performance under high temperature around 150℃ comparing with under the ambient temperature of 23℃.





Chemical Resistance


Chemical Resistance of CSB-EPB5A is very good. It can work well in the heavy acid of 65%.


Water Absorbability


The water absorb rate of CSB-EPB5A is less than 0.1% under the atmospheric pressure while it is 0.5% when the material is immerged into water. The material performance and dimensions of the material is stabilized for the applications under humid environment.





UV Resistance


CSB-EPB5A can maintain its performance to be stable even exposed in the UV ray for long period.


Bearing Installation


CSB-EPB5A?The Interfit Tolerance






Diameter mm




Tolerance after fit E10




Fit Housing H7




Fit Shaft h9






>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





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