EPB4 Plastic Plain Bearings

CSB Plastic is one of the leading China epb4 plastic plain bearings manufacturers and suppliers,Website:http://www.csbbearings.com, and also a professional plastic self lubricanted bearings factory and company, we are always at your services. EPB4 Plastic Plain Bearings High temperature material with good chemical resistance feature. It could be continously used under the temperature of 200 ℃, it is also suitable to be used in the humidenvironment and even inside the chemical liquids. It is best to be used against hard materials. Continuous working temperature: -40℃～200℃; Suitable for medium and high load operation; Maintenance-free dry operation; Good chemical resistance; Suitable for humid environment. The Material Data Sheet Typical Item Standard Unit CSB-EPB4    Density ISO1183 g/cm³ 1.65    Color Black    Dynamic friction /steel(dry) 0.07-0.20    Max. PV (dry) N/mm²×m/s 1.4    Max. roatating velocity m/s 1.0    Max. oscillating velocity m/s 0.7    Max. linear velocity m/s 3.0    Tensile strength ISO527 MPa 180    Compressive strength (Axial) MPa 80    E-module ISO527 MPa 12000    Max. static pressure of the surface, 20℃ MPa 90   Shore hardness ISO868 D 87    Continuous work temperature ℃ -40/200    Short-time work temperature ℃ -40/260    Thermal conductivity ASTME1461 W/m×k 0.6    Linear coef. of thermal expansion ASTMD696 K-1×10-5 4    Moisture absorption RH50/23℃ ASTMD570 % 0.04    Max. water absorption, 23℃ % <0.1    Flammability UL94 V0    Volume resistivity IEC60093 Ωcm >104    Surface resistivity IEC60093 Ω >105 PV Value of BearingsThe max PV value of the CSB-EPB4 series bearing is 1.4N/ 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 EPB4-1). The Relation of Load, Speed and Temperature CSB-EPB4 allows the Max static load of 90Mpa, The max compressive deformation rate under the max load is listed in Graph EPB4-2, The actual load capacity of bearing is slightly less than 90Mpa, 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 EPB4-3 for such variation. The Friction Factor,Wearing and shaft material Friction Factor  Friction factor will be slightly decreased along with the speed increasing under certain loading of the rotation operation (see Graph EPB4-4) and it will be slightly decreased along with the loading increasing under certain speed of the rotation operation especially when the loading is less than 30Mpa. Graph EPB4-5 tells that the friction of the CSB-EPB4 is not changed at all when the shaft roughness is between Ra0.1 to Ra0.4 and will be considerably increased when the shaft roughness is over Ra0.4. So the recommended shaft roughness is Ra0.1- Ra0.4. CSB-EPB4 Dry Grease Oil Water Friction coef. μ 0.07~0.20 0.09 0.04 0.04 Wearing and shaft material Graph EPB4-7 shows that CSB-EPB4 is suitable for most of the shaft materials under low loading rotation operation and it is good for hardened carbon steel shaft under high loading rotation operation (see Graph EPB4-7). From Graph EPB4-8, we can also read that CSB-EPB4 is suitable for stainless steel shaft under oscillation operation and good for hot rolled carbon steel and hardened carbon steel shaft under rotation operation. Chemical Resistance The Chemical Resistance of CSB-EPB4 is fairly good against most of Acid and Alkalis. Water Absorbability The water absorb rate of CSB-EPB4 is 0.1% under the atmospheric pressure while it is 0.3% 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 Disintegration could be possible for the material CSBEPB4 after long period of exposing under the UV ray and therefore the compressive strength will be reduced. Bearing Installation CSB-EPB4 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