EPB3M Plastic Plain Bearings

CSB Plastic is one of the leading China epb3m plastic plain bearings manufacturers and suppliers,Website:http://www.csbbearings.com, and also a professional epb3m plastic plain plastic bearing bushings factory and company, we are always at your services. EPB3M Plastic Plain Bearings Best for middle to high load applications. With the perfect combination of reinforced fibre and good lubrication feature, this material is suitbale to be used under the temperature of 130℃. Continuous working temperature: -40℃～130℃; Suitable for medium and high load operation; Maintenance-free dry operation; Applicable for various shaft materials; Good for rotation and oscillating operation; Excellent dust resistance. The Material Data Sheet Typical Item Standard Unit CSB-EPB3M    Density ISO1183 g/cm³ 1.15    Color Dark Grey    Dynamic friction /steel(dry) 0.09-0.30    Max. PV (dry) N/mm²×m/s 0.2    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 110    Compressive strength (Axial) MPa 50    E-module ISO527 MPa 2500    Max. static pressure of the surface, 20℃ MPa 20   Shore hardness ISO868 D 79    Continuous work temperature ℃ -40/80    Short-time work temperature ℃ -40/170    Thermal conductivity ASTME1461 W/m×k 0.25    Linear coef. of thermal expansion ASTMD696 K-1×10-5 10    Moisture absorption RH50/23℃ ASTMD570 % 1.4    Max. water absorption, 23℃ % 7.6    Flammability UL94 HB    Volume resistivity IEC60093 Ωcm >1012    Surface resistivity IEC60093 Ω >1011 PV Value of Bearings The max PV value of the CSB-EPB3M series bearing is 0.2N/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 EPB3M-1). The Relation of Load, Speed and Temperature CSB-EPB3M allows the Max static load of 20Mpa, The max compressive deformation rate under the max load is listed in Graph EPB3M-2, The actual load capacity of bearing is slightly less than 20Mpa, 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 EPB3M-3 for such variation. The Friction Factor,Wearing and shaft material Friction Factor CSB-EPB3M Bearing Friction factor is increased along with the increasing of the operation speed (See Graph EPB3M-4) therefore it is suitable for the application under low speed operation. The friction factor of CSB-EP3M is decreased along with the loading increasing (see Graph EPB3M-5). The friction factor and wearing of the bearing is considerably affected by the counter shaft roughness. The Graph EPB3M-6 shows that the bearing could achieve its best performance when the counter shaft surface roughness is around Ra0.6. CSB-EPB3M Dry Grease Oil Water Friction coef. μ 0.10~0.30 0.09 0.04 0.04 Wearing and shaft material Test of the bearing against various shaft materials shows that the material CSB-EPB3M features the wearing performance of the material is not sensitive with different materials where the loading is over 2Mpa. (See Graph EPB3M-7). The bearing performance remains the best when the loading is in the lower range. When the loading is increased, the wearing will be sharply increased. From the Graph EPB3M-8, the CSB-EPB3M material is better for the application with the counter shaft material of hard chrome steel. Graph EPB3M-8 shows that the material is better for rotation operation than oscillation operation. Chemical Resistance CSB-EPB3M is good at chemical resistance against weak acidic medium and various kinds of lubricants. Water Absorbability The water absorb rate of CSB-EPB3M is 1.4% under the atmospheric pressure while it is 7.6% when the material is immerged into water. The application environment has to be considered because of its water absorb properties. UV Resistance CSB-EPB3M can maintain its color unchanged when it is exposed into the UV ray. The material performance stays stable. Bearing Installation CSB-EPB3M The Interfit Tolerance Diameter mm Tolerance after fit E10 Fit Housing H7 Fit Housing 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