EPBH Plastic Plain Bearings

CSB Plastic is one of the leading China epbh plastic plain bearings manufacturers and suppliers,Website:http://www.csbbearings.com, and also a professional plastic slide bearings factory and company, we are always at your services. EPBH Plastic Plain Bearings ● This material is developed against the requirement of wear resistance and economic cost for cost effective and big quantity comsuming applications. ● Continuous working temperature: -40℃～80℃; ● Suitable for most of average and low load; ● Maintenance-free dry operation; ● Low cost for high quantities The Material Data Sheet Typical Item Standard Unit CSB-EPBH    Density ISO1183 g/cm³ 1.45    Color Black    Dynamic friction /steel(dry) 0.05-.020    Max. PV (dry) N/mm²×m/s 0.3    Max. roatating velocity m/s 0.8    Max. oscillating velocity m/s 0.6    Max. linear velocity m/s 2.5    Tensile strength ISO527 MPa 75    Compressive strength (Axial) MPa 60    E-module ISO527 MPa 2200    Max. static pressure of the surface, 20℃ MPa 30    Shore hardness ISO868 D 74    Continuous work temperature ℃ -40/80    Short-time work temperature ℃ -40/120    Thermal conductivity ASTME1461 W/m×k 0.2    Linear coef. of thermal expansion ASTMD696 K-1×10-5 10    Moisture absorption RH50/23℃ ASTMD570 % 0.2    Max. water absorption, 23℃ % 1.2    Flammability UL94 HB    Volume resistivity IEC60093 Ωcm >1012    Surface resistivity IEC60093 Ω >1015 PV Value of Bearings The max PV value of the CSB-EPBH series bearing is 0.3N/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 EPBH-1) The Relation of Load, Speed and Temperature CSB-EPBH allows the Max static load of 30Mpa, The max compressive deformation rate under the max load is listed in Graph EPBH-2, The actual load capacity of bearing is slightly less than 30Mpa, The bearing load is variable against the speed and temperature, Fast speed (Vmax:0.8m/s) results into higher temperature (Tmax：80℃) which decreases the load capacity of the bearing. Please refer to the Graph EPBH-3 for such variation. The Friction Factor,Wearing and shaft material Friction Factor CSB-EPBH friction factor is not sensitive to the operation speed and bearing loading (see Graph EPBH-4 and Graph EPBH-5). The above features are the most common considerations for the bearing material selection. The friction of CSB-EPBH could be maintained at a relatively lower level so that the good wearing features are guaranteed. From the Graph EPBH-6, we could see that the friction factor is variable against the changing of shaft roughness. The recommended shaft roughness is Ra0.3~0.5. CSB-EPBH Dry Grease Oil Water Friction coef.μ 0.05~0.20 0.09 0.04 0.04 Wearing and shaft material The shaft material is an important media for the bearing wearing but CSB-EPBH is suitable for almost all kinds of shaft materials. Graph EPBH-7 and Graph EPBH-8 show that the wearing feature of CSB-EPBH is excellent when the shaft material are hardened chrome steel or hardened steel or hardened Aluminum. Chemical Resistance CSB-EPBH is good at chemical resistance against mild base, weak acidic medium and various kinds of lubricants. Water Absorbability The water absorb rate of CSB-EPBH is 0.2% under the atmospheric pressure while it is 1.2% when the material is immerged into water. With its low water absorbability, the material is suitable for humid environment applications. UV Resistance CSB-EPBH can maintain its color unchanged when it is exposed into the UV ray. The hardness, Compressive strength and wear resistance of the material is also stable under such condition. Bearing Installation CSB-EPBH 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