EPB2D Plastic Plain Bearings

CSB Plastic is one of the leading China epb2d plastic plain bearings manufacturers and suppliers,Website:http://www.csbbearings.com, and also a professional plastic sliding bearings factory and company, we are always at your services. EPB2D Plastic Plain Bearings ● The combination of middle to low load and low speed application requirement. It is a meterial without PTFE embedded for the low cost and big quantity demanding. ● Continuous working temperature: -40℃～80℃; ● Very common; suitable for most of average and low load; ● Maintenance-free dry operation; ● Light wear against different shaft materials; ● Low friction. The Material Data Sheet Typical Item Standard Unit CSB-EPB2D    Density ISO1183 g/cm³ 1.40    Color Green    Dynamic friction /steel(dry) 0.05-.025    Max. PV (dry) N/mm²×m/s 0.3    Max. roatating velocity m/s 1.2    Max. oscillating velocity m/s 0.8    Max. linear velocity m/s 3.0    Tensile strength ISO527 MPa 75    Compressive strength (Axial) MPa 60    E-module ISO527 MPa 2000    Max. static pressure of the surface, 20℃ MPa 25   Shore hardness ISO868 D 74    Continuous work temperature ℃ -40/80    Short-time work temperature ℃ -40/120    Thermal conductivity ASTME1461 W/m×k 0.25    Linear coef. of thermal expansion ASTMD696 K-1×10-5 11    Moisture absorption RH50/23℃ ASTMD570 % 0.2   Max. water absorption, 23℃ % 1.1   Flammability UL94 HB    Volume resistivity IEC60093 Ωcm >1013    Surface resistivity IEC60093 Ω >1012 PV Value of Bearings The max PV value of the CSB-EPB2D 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 EPB2D-1). The Relation of Load, Speed and Temperature CSB-EPB2D allows the Max static load of 25Mpa, The max compressive deformation rate under the max load is listed in Graph EPB2D-2, The actual load capacity of bearing is slightly less than 25Mpa, The bearing load is variable against the speed and temperature, Fast speed (Vmax: 1.2m/s) results into higher temperature (Tmax:80℃) which decreases the load capacity of the bearing.Please refer to the Graph EPB2D-3 for such variation. The Friction Factor,Wearing and shaft material Friction Factor Graph EPB2D-4 shows that the friction factor of CSBEPB2D is initially increased along with the operation speed increasing when the loading is stable but when the speed reaches over 0.25m/s, it is decreased along with the operation speed increasing. Graph EPB2D-5 shows that the friction factor of CSB-EPB2D is decreasing along with the loading increasing when the operation speed is stable. Graph EPB2D-6 shows the friction factor of CSBEPB2D is sensitive to the shaft roughness. The best shaft roughness for this material is Ra0.3~0.6. CSB-EPB2D Dry Grease Oil Water Friction coef. μ 0.05~0.25 0.09 0.04 0.04 Wearing and shaft material Graph EPB2D-7 and Graph EPB2D-8 shows that the hardened chrome steel shaft is good for CSB-EPB2D bearings under lower loading and stainless steel shaft is better when the loading is over 1.0Mpa. Graph EPB2D-8 shows hardened steel shaft is recommended in rotation operation but hardened chrome steel shaft is recommended in oscillation operation. Chemical Resistance CSB-EPB2D is good at chemical resistance against mild base, weak acidic medium and various kinds of lubricants. Water Absorbability The water absorb rate of CSB-EPB2D is 0.2% under the atmospheric pressure while it is 1.1% when the material is immerged into water. With its low water absorbability, the material is suitable for humid environment applications.  UV Resistance The color of CSB-EPB2D will become lighter 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-EPB2D 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