EPB7 Plastic Plain Bearings
EPB7 Plastic Plain Bearings
A material with low friction factor and good wear resistance. The outstanding wear resistance feature of it ensures the applications where the other plastic bearings are not suitable. It is good for both hard and soft shaft.
Continuous working temperature: -40?~100?;
Good wear resistance with long service life;
Suitable for operation in dusty environment;
No special requirement on the surface roughness;
The Material Data Sheet
Dynamic friction /steel(dry)
Max. PV (dry)
Max. roatating velocity
Max. oscillating velocity
Max. linear velocity
Compressive strength (Axial)
Max. static pressure of the surface, 20?
Continuous work temperature
Short-time work temperature
Linear coef. of thermal expansion
Moisture absorption RH50/23?
Max. water absorption, 23?
PV Value of Bearings
The max PV value of the CSB-EPB7 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 EPB7-1).
The Relation of Load, Speed and Temperature
CSB-EPB7 allows the Max static load of 65Mpa, The max compressive deformation rate under the max load is listed in Graph EPB7-2, The actual load capacity of bearing is slightly less than 65Mpa, 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 EPB7-3 for such variation.
The Friction Factor,Wearing and shaft material
CSB-EPB7 Bearing Friction factor is not so sensitive to the operation speed (see Graph EPB7-4). The friction factor is considerably decreased along with the loading increasing and it will be turned to be stable when the loading reaches 20Mpa. Graph EPB7-5 shows the friction factor of the bearing is also not sensitive to the shaft roughness but we still recommend that the roughness of the shaft should be neither too smooth nor too rough. It is recommended to keep the roughness of the shaft to be within the range of Ra0.3 to Ra0.6.
|Friction coef. µ||0.09~0.20||0.09||0.04||0.04|
Wearing and shaft material
Graph EPB7-7 shows that the CSB-EPB7 material is not sensitive with different materials under the rotating operation. It is suitable for hard shaft and high speed steel shaft as well as hard chrome steel shaft. Graph EPB7-8 shows that the hard chrome steel shaft is most suitable for using CSB-EPB7 bearing because the wearing speed is not sensitive when the loading is increased. From the Graph EPB7-8, it shows that CSB-EP7 features different performance.
CSB-EPB7 is good at chemical resistance against weak acidic medium and various kinds of lubricants.
The water absorb rate of CSB-EPB7 is 1.3% under the atmospheric pressure while it is 6.5% when the material is immerged into water. The application environment has to be considered because of its water absorb properties.
The color of CSB-EPB7 could be dimmed when it is exposed into the UV ray. The material performance stays stable.
CSB-EPB7 The Interfit Tolerance
Tolerance after fit E10
Fit Housing H7
Fit Shaft h9
CSB Plastic is one of the leading China epb7 plastic plain bearings manufacturers and suppliers, and also a professional epb7 plastic plain bearings factory and company, we are always at your services.