CSB Plastic is one of the leading China epb19 plastic plain bearings manufacturers and suppliers, and also a professional epb19 plastic plain bearings factory and company, we are always at your services.EPB19 Plastic Plain Bearings● Wear resistance material for temperature up to 150 ℃. The Features of the material is kept stable either at high or low temperature.● Continuous working temperature: -40℃～150℃;● Applicable for oscillating under high load;● Maintenance-free dry operation;● High pressure resistance.The Material Data SheetTypical ItemStandardUnitCSB-EPB19? ?DensityISO1183g/cm31.46? ?ColorDark Grey? ?Dynamic friction /steel(dry)0.05-.020? ?Max. PV (dry)N/mm2×m/s0.7? ?Max. roatating velocitym/s1.2? ?Max. oscillating velocitym/s0.8? ?Max. linear velocitym/s4.0? ?Tensile strengthISO527MPa100? ?Compressive strength (Axial)MPa60? ?E-moduleISO527MPa3500? ?Max. static pressure of the surface, 20℃MPa60??Shore hardnessISO868D77? ?Continuous work temperature℃-40/150? ?Short-time work temperature℃-40/200? ?Thermal conductivityASTME1461W/m×k0.25? ?Linear coef. of thermal expansionASTMD696K-1×10-55? ?Moisture absorption RH50/23℃ASTMD570%1.3? ?Max. water absorption, 23℃%2.5? ?FlammabilityUL94HB? ?Volume resistivityIEC60093Ωcm>1015? ?Surface resistivityIEC60093Ω>1012PV Value of BearingsThe max PV value of the CSB-EPB19 series bearing is 0.7N/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 EPB19-1).The Relation of Load, Speed and TemperatureCSB-EPB19 allows the Max static load of 70Mpa, The max compressive deformation rate under the max load is listed in Graph EPB19-2, The actual load capacity of bearing is slightly less than 70Mpa, The bearing load is variable against the speed and temperature, Fast speed (Vmax: 1.5m/s) results into higher temperature (Tmax: 150℃) which decreases the load capacity of the bearing. Please refer to the Graph EPB19-3 for such variation.The Friction Factor,Wearing and shaft materialFriction Factor
?Graph EPB19-4 shows that the friction factor of CSBEPB19 is not sensitive to the operation speed. Graph EPB19-5 tells that the friction factor of CSB-EPB19 is decreased along with the loading increasing and will be relatively stable when the loading reaches 20 Mpa upwards. Graph EPB19-6 shows that the friction factor of CSB-EPB19 is not sensitive to the shaft surface roughness. Therefore, it is recommended a proper shaft surface roughness in the range of Ra0.3~0.6.CSB-EPB19DryGreaseOilWaterFriction coef.?μ0.05~0.200.090.040.04Wearing and shaft materialGraph EPB19-7 shows CSB-EPB19 friction factor is variable against different shaft materials in rotation operation under loading of 2Mpa. Testing indicates that hardened shaft is best for rotation operation of CSBEPB19. The operation condition is better when CSBEPB19 is used against hardened steel shafts, high speed steel shaft and hardened chrome steel shaft under rotation operation. Graph EPB19-8x describes that hardened chrome steel is better for this material under high loading operation where as long as the increasing of the loading, the wearing of the bearing is relatively stable.Chemical ResistanceCSB-EPB19 is good at chemical resistance against mild base, weak acidic medium and various kinds of lubricants.Water AbsorbabilityThe water absorb rate of CSB-EPB19 is 1.3% under the atmospheric pressure while it is 2.5% when the material is immerged into water. The application environment has to be considered because of its water absorb properties.UV ResistanceThe color of CSB-EPB19 could be dimmed when it is exposed into the UV ray. The material performance stays stable.Bearing InstallationCSB-EPB19?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