EPB2 Plastic Plain Bearings

CSB Plastic is one of the leading China epb2 plastic plain bearings manufacturers and suppliers,Website:http://www.csbbearings.com, and also a professional plastic compound bushings factory and company, we are always at your services. EPB2 Plastic Plain Bearings ● The solution of middle to low load application and economic effective requirement. It is also one of the low water absorbing materials. ● Continuous working temperature: -50℃～100℃; ● Suitable for medium load operation; ● Maintenance-free dry operation; ● For wet conditions; ● Low cost material for high quantities; The Material Data Sheet Typical Item Standard Unit CSB-EPB2    Density ISO1183 g/cm³ 1.29    Color Olive    Dynamic friction /steel(dry) 0.07-.020    Max. PV (dry) N/mm²×m/s 0.5    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 80    Compressive strength (Axial) MPa 70    E-module ISO527 MPa 2400    Max. static pressure of the surface, 20℃ MPa 60    Shore hardness ISO868 D 75    Continuous work temperature ℃ -50/110    Short-time work temperature ℃ -50/150    Thermal conductivity ASTME1461 W/m×k 0.25    Linear coef. of thermal expansion ASTMD696 K-1×10-5 10    Moisture absorption RH50/23℃ ASTMD570 % 0.2    Max. water absorption, 23℃ % 0.4    Flammability UL94 HB    Volume resistivity IEC60093 Ωcm >1014    Surface resistivity IEC60093 Ω >1015 PV Value of Bearings The max PV value of the CSB-EPB2 series bearing is 0.5N/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 EPB2-1). The Relation of Load, Speed and Temperature CSB-EPB2 allows the Max static load of 60Mpa, The max compressive deformation rate under the max load is listed in Graph EPB2-2, The actual load capacity of bearing is slightly less than 60Mpa, The bearing load is variable against the speed and temperature, Fast speed (Vmax:1.0m/s) results into higher temperature (Tmax: 100℃)which decreases the load capacity of the bearing. Please refer to the Graph EPB2-3 for such variation. The Friction Factor,Wearing and shaft material Friction Factor Similar with most of the plastic bearings, the friction factor of CSB-EPB2 is increased along with the operation speed when the loading is stable (see Graph EPB2-4) and is decreased along with the loading increasing when the operation speed is stable (see Graph EPB2-5). From Graph EPB2-6, it shows the friction factor of CSB-EPB2 is variable against different shaft surface roughness. The recommended shaft surface roughness is Ra0.3~0.6. CSB-EPB2 Dry Grease Oil Water Friction coef.μ 0.07~0.20 0.09 0.04 0.04 Wearing and shaft material Graph EPB2-7 shows that CSB-EPB2 is rather suitable for hardened steel shaft and hardened chrome steel shaft under lower loading andGraph EPB2-7 shows that CSBEPB2 wearing feature is better for oscillation operation than of rotation operation. Chemical Resistance CSB-EPB2 is good at chemical resistance against weak acidic medium and various kinds of lubricants. Water Absorbability The water absorb rate of CSB-EPB2 is 0.2% under the atmospheric pressure while it is 0.4% when the material is immerged into water. With its low water absorbability, the material is suitable for humid environment applications. UV Resistance Disintegration could be possible for the material CSBEPB2 after long period of exposing under the UV ray and therefore the performance of the material will be reduced. Bearing Installation CSB-EPB2 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