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EPB3G Plastic Plain Bearings
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Autor:  yxuraleqatyny [ Di 23. Feb 2021, 09:37 ]
Betreff des Beitrags:  EPB3G Plastic Plain Bearings
CSB Plastic is one of the leading China epb3g plastic plain bearings manufacturers and suppliers, and also a professional plastic bushing bearings
factory and company, we are always at your services.


EPB3G Plastic Plain Bearings


● Optimized for middle load applications. It is suitable for low frequency motion and low cost requirement.


● Continuous working temperature: -40℃～110℃;


● High load capacity;


● Good economic ratio;


● Dry operation and maintenance free;


● Applicable for various shaft materials.


The Material Data Sheet









Typical Item




Standard




Unit




CSB-EPB3G






? ?Density




ISO1183




g/cm3




1.37






? ?Color






Black






? ?Dynamic friction /steel(dry)






0.05-0.15






? Max. PV (dry)





N/mm2×m/s




0.3






? ?Max. roatating velocity





m/s




0.8






? ?Max. oscillating velocity





m/s




0.6






? ?Max. linear velocity





m/s




3.5






? ?Tensile strength




ISO527




MPa




190






? ?Compressive strength (Axial)





MPa




75






? ?E-module




ISO527




MPa




7500






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





MPa




75






??Shore hardness




ISO868




D




78






? ?Continuous work temperature





℃




-40/110






? ?Short-time work temperature





℃




-40/200






? ?Thermal conductivity




ASTME1461




W/m×k




0.25






? ?Linear coef. of thermal expansion




ASTMD696




K-1×10-5




11






? ?Moisture absorption RH50/23℃




ASTMD570




%




1.3





? ?Max. water absorption, 23℃



%


5.5





? ?Flammability




UL94





HB






? ?Volume resistivity




IEC60093




Ωcm




>1013






? ?Surface resistivity




IEC60093




Ω




>1011









PV Value of Bearings


The max PV value of the CSB-EPB3G series bearing 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 EPB3G-1).





CSB-EPB3G allows the Max static load of 75Mpa, The max compressive deformation rate under the max load is listed in Graph EPB3G-2, The actual load capacity of bearing is slightly less than 75Mpa, The bearing load is variable against the speed and temperature, Fast speed (Vmax: 0.8m/s) results into higher temperature (Tmax: 110℃) which decreases the load capacity of the bearing. Please refer to the Graph EPB3G-3 for such variation.








The Friction Factor,Wearing and shaft material


Friction Factor


Graph EPB3G-4 and Graph EPB3G-5 show that the friction factor of CSB-EPB3G is variable along with the changing of the operation speed and bearing loading especially when the bearing loading is within 20Mpa. In the mean while the Graph EPB3G-6 shows that the friction factor of CSB-EPB3G is also affected by the shaft surface roughness. Too rough shaft surface or too fine shaft surface will increase the wearing and friction factor. The recommended shaft surface roughness is Ra0.1~0.3.








CSB-EPB3G


Dry


Grease


Oil


Water




Friction coef.?μ


0.05~0.15


0.09


0.04


0.04

















Wearing and shaft material


Graph EPB3G-7 and Graph EPB3G-8 show that the wearing of CSB-EPB3G is similar either against the normal shaft or hardened shaft. The most suitable shaft materials for CSB-EPB3G are hardened steel and hardened chrome steel. Graph EPB3G-8 shows that the wearing feature is better in oscillation operation than in rotation operation.








Chemical Resistance


CSB-EPB3G is good at chemical resistance against weak acidic medium and various kinds of lubricants.


Water Absorbability


The water absorb rate of CSB-EPB3G is 1.3% under the atmospheric pressure while it is 5.5% when the material is immerged into water. The application environment has to be considered because of its water absorb properties





UV Resistance


CSB-EPB3G can maintain its color unchanged when it is exposed into the UV ray. The material performance stays stable.


Bearing Installation


CSB-EPB3G 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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