EPB21 Plastic Plain Bearings
EPB21 Plastic Plain Bearings
Low friction and good wear resistance for high temperature applications. The excellent chemical resistance of the material ensures athe applications for high temperature and high chemical erosion applications.
Continuous working temperature: -40?~200?;
Very low coefficient of friction;
Maintenance-free dry operation;
High temperature and good chemical resistance;
Suitable for humid environment.
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?||%||0.3|
PV Value of Bearings
The max PV value of the CSB-EPB21 series bearing is 0.8N/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 EPB21-1).
The Relation of Load, Speed and Temperature
CSB-EPB21 allows the Max static load of 80Mpa, The max compressive deformation rate under the max load is listed in Graph EPB21-2, The actual load capacity of bearing is slightly less than 80Mpa, The bearing load is variable against the speed and temperature, Fast speed (Vmax: 2.0m/s) results into higher temperature (Tmax: 200?) which decreases the load capacity of the bearing. Please refer to the Graph EPB21-3 for such variation.
The Friction Factor,Wearing and shaft material
Friction factor will be slightly decreased along with the speed increasing under certain loading of the rotation operation (see Graph EPB21-4) and it will be slightly decreased along with the loading increasing under certain speed of the rotation operation especially when the loading is less than 30Mpa. Graph EPB21-5 tells that the friction of the CSB-EPB21 is not changed at all when the shaft roughness is between Ra0.3 to Ra0.4 and will be considerably increased when the shaft roughness is over Ra0.4. So
|Friction coef. µ||0.03~0.15||0.09||0.04||0.04|
Wearing and shaft material
Graph EPB21-7 shows that CSB-EPB21 is suitable for most of the shaft materials under low loading rotation operation and it is good for hardened carbon steel shaft under high loading rotation operation (see Graph EPB21-7). From Graph EPB21-8, we can also read that CSB-EPB21 is suitable for stainless steel shaft under oscillation operation and good for hot rolled carbon steel and hardened carbon steel shaft under rotation operation.
The Chemical Resistance of CSB-EPB21 is fairly good against most of Acid and Alkalis.
The water absorb rate of CSB-EPB21 is 0.1% under the atmospheric pressure while it is 0.3% when the material is immerged into water. The material performance and dimensions of the material is stabilized for the applications under humid environment.
Disintegration could be possible for the material CSBEPB21 after long period of exposing under the UV ray and therefore the compressive strength will be reduced.
CSB-EPB21A The Interfit Tolerance
Tolerance after fit E10
Fit Housing H7
Fit Shaft h9
CSB Plastic is one of the leading China epb21 plastic plain bearings manufacturers and suppliers, and also a professional epb21 plastic plain bearings factory and company, we are always at your services.