CSB Plastic is one of the leading China epb4h plastic plain bearings manufacturers and suppliers,Website:http://www.csbbearings.com, and also a professional plastic self lubricanting bearings factory and company, we are always at your services. EPB4H Plastic Plain Bearings ● Material for high temperature up to 200 ℃ with low friction factor. It is with outstanding wear resistance both for dry operation and humid environment. ● Continuous working temperature: -40℃～200℃; ● High temperature and lower cost; ● Maintenance-free dry operation; ● Good chemical resistance; ● Suitable for humid environment. The Material Data Sheet Typical Item Standard Unit CSB-EPB4H Density ISO1183 g/cm³ 1.77 Color Yellow Dynamic friction /steel(dry) 0.10-.030 Max. PV (dry) N/mm²×m/s 0.7 Max. roatating velocity m/s 1.0 Max. oscillating velocity m/s 0.7 Max. linear velocity m/s 1.0 Tensile strength ISO527 MPa 190 Compressive strength (Axial) MPa 150 E-module ISO527 MPa 10000 Max. static pressure of the surface, 20℃ MPa 100 Shore hardness ISO868 D 80 Continuous work temperature ℃ -40/200 Short-time work temperature ℃ -40/260 Thermal conductivity ASTME1461 W/m×k 0.25 Linear coef. of thermal expansion ASTMD696 K-1×10-5 4 Moisture absorption RH50/23℃ ASTMD570 % <0.1 Max. water absorption, 23℃ % 0.2 Flammability UL94 V0 Volume resistivity IEC60093 Ωcm >1017 Surface resistivity IEC60093 Ω >1016 PV Value of Bearings The max PV value of the CSB-EPB4H 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 EPB4H-1). The Relation of Load, Speed and Temperature CSB-EPB4H allows the Max static load of 100Mpa, The max compressive deformation rate under the max load is listed in Graph EPB4H-1, The actual load capacity of bearing is slightly less than 100Mpa, The bearing load is variable against the speed and temperature, Fast speed (Vmax: 1.0m/s) results into higher temperature (Tmax: 200℃) which decreases the load capacity of the bearing. Please refer to the Graph EPB4H-3 for such variation. The Friction Factor,Wearing and shaft material Friction FactorGraph EPB4H-4 shows the friction factor of CSB-EPB4H is not obviously effected by the operation speed when the loading is stable and Graph EPB4H-5 shows it will be decreasing along with the loading is increased from 0 to 20 Mpa when the operation speed is unchanged, furthermore the friction factor will not be changed when the loading reaches 20Mpa upward. The friction factor of CSB-EPB4H is increased along with the increasing of the shaft roughness. The recommended shaft roughness is Ra0.1 to Ra0.6. CSB-EPB4H Dry Grease Oil Water Friction coef. μ 0.10~0.30 0.09 0.04 0.04 Wearing and shaft material Graph EPB4H-7 and Graph EPB4H-8 tells that the CSBEPB4H is very good for Hardened shaft and soft shaft and it features excellent both on hardened steel shaft and hardened shaft but the hardened chrome steel shaft is not good for CSB-EPB4H bearings. Graph EPB4H-8 shows that the wearing of CSB-EPB4H is better on oscillation operation than on rotation operation. The wearing will be increased when the loading is over 10Mpa. Chemical Resistance The Chemical Resistance of CSB-EPB4H is fairly good against most of Acid and Alkalis. Water Absorbability The water absorb rate of CSB-EPB4H is less than 0.1% under the atmospheric pressure while it is less than 0.1% when the material is immerged into water. The material performance and dimensions of the material is stabilized for the applications under humid environment or even in the water. UV Resistance Disintegration could be possible for the material CSBEPB4H after long period of exposing under the UV ray and therefore the compressive strength will be reduced. Bearing Installation CSB-EPB4H 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
