CSB Plastic is one of the leading China epb25 plastic plain bearings manufacturers and suppliers, and also a professional epb25 plastic plain bearings factory and company, we are always at your services.EPB25 Plastic Plain Bearings● Good wear resistance material under high temperature of 180 ℃. Better wear resistance for the rotation application and it has no critical requirement about the shaft hardness.● Continuous working temperature: -100℃～180℃;● Maintenance-free dry operation;● Suitable in high load;● Lower friction.The Material Data SheetTypical ItemStandardUnitCSB-EPB25DensityISO1183g/cm31.44ColorYellowDynamic friction /steel(dry)0.08-.020Max. PV (dry)N/mm2×m/s0.45Max. roatating velocitym/s1.30Max. oscillating velocitym/s1.00Max. linear velocitym/s4.00Tensile strengthISO527MPa55Compressive strength (Axial)MPa60E-moduleISO527MPa2200Max. static pressure of the surface, 20℃MPa60Shore hardnessISO868D80Continuous work temperature℃-100/180Short-time work temperature℃-100/210Thermal conductivityASTME1461W/m×k0.24Linear coef. of thermal expansionASTMD696K-1×10-57Moisture absorption RH50/23℃ASTMD570%0.3Max. water absorption, 23℃%1.6FlammabilityUL94V0Volume resistivityIEC60093Ωcm>1013Surface resistivityIEC60093Ω>1010PV Value of BearingsThe max PV value of the CSB-EPB25 series bearing is 0.45N/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 EPB25-1).The Relation of Load, Speed and TemperatureCSB-EPB25 allows the Max static load of 60Mpa, The max compressive deformation rate under the max load is listed in Graph EPB25-2, The actual load capacity of bearing is slightly less than 60Mpa, The bearing load is variable against the speed and temperature, Fast speed (Vmax: 1.3m/s) results into higher temperature (Tmax: 180℃) which decreases the load capacity of the bearing. Please refer to the Graph EPB25-3 for such variation.The Friction Factor,Wearing and shaft materialFriction Factor
?Graph EPB25-4 shows that the friction factor of CSBEPB25 is not sensitive to the operation speed and Graph EPB25-5 shows that the friction factor is CSB-EPB25 is decreased along with the loading increasing and become stable when the loading is over 20Mpa. Graph EPB25-6 tells that the friction factor of CSB-EPB25 is also not sensitive to the shaft roughness but we still recommend the shaft roughness to be Ra0.7~0.9.CSB-EPB25DryGreaseOilWaterFriction coef.?μ0.05~0.150.090.040.04Wearing and shaft materialGraph EPB25-7 shows that the wearing of CSB-EPB25 is sensitive to different materials under rotation operation with the loading of 2Mpa. It is suitable for hardened shaft, high speed steel shaft and hardened chrome steel shaft in the rotation operation. Hardened chrome steel shaft is the best choice for CSB-EPB25(Graph EPB25-8). The wearing will be decreased as long as the loading increasing.Chemical ResistanceCSB-EPB25 is good at chemical resistance against weak acidic medium and various kinds of lubricants.Water AbsorbabilityThe water absorb rate of CSB-EPB25 is 0.3% under the atmospheric pressure while it is 1.6% when the material is immerged into water. The application environment has to be considered because of its water absorb properties.UV ResistanceCSB-EPB25 can maintain its color unchanged when it is exposed into the UV ray. The material performance stays stable.Bearing InstallationCSB-EPB25?The Interfit ToleranceDiameter mmTolerance after fit E10Fit Housing H7Fit Shaft h9>0～3+0.014～+0.0540～+0.0100～-0.025>3～6+0.020～+0.0680～+0.0120～-0.030>6～10+0.025～+0.0830～+0.0150～-0.036>10～18+0.032～+0.1020～+0.0180～-0.043>18～30+0.040～+0.1240～+0.0210～-0.052>30～50+0.050～+0.1500～+0.0250～-0.062>50～80+0.060～+0.1800～+0.0300～-0.074>80～120+0.072～+0.2120～+0.0350～-0.087>120～180+0.085～+0.2450～+0.0400～-0.100