EPB5Z Plastic Plain Bearings

CSB Plastic is one of the leading China epb5z plastic plain bearings manufacturers and suppliers,Website:http://www.csbbearings.com, and also a professional plastic self lubricant bearings factory and company, we are always at your services. EPB5Z Plastic Plain Bearings ● It is a high load material with excellent low friction factor.Marginal load application is acceptable and it is with good wear resistance both for hard and soft shafts. ● Continuous working temperature: -100℃～250℃; ● High load capacity; ● Higher speed is permissible; ● Marginal pressure is permissible; ● Best performance for oscillating movement. The Material Data Sheet Typical Item Standard Unit CSB-EPB5Z    Density ISO1183 g/cm³ 1.40    Color Brown    Dynamic friction /steel(dry) 0.05-0.15    Max. PV (dry) N/mm²×m/s 1.0    Max. roatating velocity m/s 1.5    Max. oscillating velocity m/s 1.1    Max. linear velocity m/s 5.0    Tensile strength ISO527 MPa 90    Compressive strength (Axial) MPa 65    E-module ISO527 MPa 2500    Max. static pressure of the surface, 20℃ MPa 150   Shore hardness ISO868 D 81    Continuous work temperature ℃ -100/250    Short-time work temperature ℃ -100/310    Thermal conductivity ASTME1461 W/m×k 0.6    Linear coef. of thermal expansion ASTMD696 K-1×10-5 4 Moisture absorption RH50/23℃ ASTMD570 % 0.3 Max. water absorption, 23℃ % 1.1 Flammability UL94 V0    Volume resistivity IEC60093 Ωcm >1011    Surface resistivity IEC60093 Ω >1011 PV Value of Bearings The max PV value of the CSB-EPB5Z series bearing is 1.0N/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 EPB5Z-1). The Relation of Load, Speed and Temperature CSB-EPB5Z allows the Max static load of 150Mpa, The max compressive deformation rate under the max load is listed in Graph EPB5Z-2, The actual load capacity of bearing is slightly less than 150Mpa, The bearing load is variable against the speed and temperature, Fast speed (Vmax: 1.5m/s) results into higher temperature (Tmax: 250℃) which decreases the load capacity of the bearing. Please refer to the Graph EPB5Z-3 for such variation. The Friction Factor,Wearing and shaft material Friction FactorGraph EPB5Z-4 shows that the friction factor of CSBEPB5Z is initially increased along with the operation speed increasing when the loading is stable but when the speed reaches over 0.2m/s, it is decreased along with the operation speed increasing. Graph EPB5Z-5 shows that the friction factor of CSB-EPB5Z is decreasing along with the loading increasing when the operation speed is stable. The best shaft roughness for this material is Ra0.4~0.7. CSB-EPB5Z Dry Grease Oil Water Friction coef. μ 0.05~0.15 0.09 0.04 0.04 Wearing and shaft material Graph EPB5Z-7 and Graph EPB5Z-8 shows that the wearing speed of CSB-EPB5Z is similar with most of the other materials under lower loading but it will be much better when the loading is higher. It also tells that the hardened steel shaft is good for CSB-EPB5Z bearings. Graph EPB5Z-8 shows the wearing rate is less in oscillation operation than in rotation operation especially when the loading is over 20Mpa. Heat-treated steel shaft is recommended in rotation operation and stainless steel and hardened chrome steel shaft is recommended in oscillation operation. Chemical Resistance CSB-EPB5Z is good at chemical resistance against mild base, weak acidic medium and various kinds of lubricants. Water Absorbability The water absorb rate of CSB-EPB5Z is less than 0.3% under the atmospheric pressure while it is 1.1% 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 The material performance of CSB-EP5Z will be lowered if it is exposed in the UV ray for long period. Bearing Installation CSB-EPB5Z 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