EPB18 Plastic Plain Bearings
EPB18 Plastic Plain Bearings
A self-lubricating material with low water absorbtion. Good wear resistance will be maintained when used with soft shaft and hard shaft combined.
Continuous working temperature: -50?~110?;
Maintenance-free dry operation;
High load requirement;
Suitable for working in 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?||%||0.5|
PV Value of Bearings
The max PV value of the CSB-EPB18 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 EPB18-1).
The Relation of Load, Speed and Temperature
CSB-EPB18 allows the Max static load of 70Mpa, The max compressive deformation rate under the max load is listed in Graph EPB18-2, The actual load capacity of bearing is slightly less than 70Mpa, The bearing load is variable against the speed and temperature, Fast speed (Vmax: 1.20m/s) results into higher temperature (Tmax: 110?) which decreases the load capacity of the bearing. Please refer to the Graph EPB18-3 for such variation.
The Friction Factor,Wearing and shaft material
Graph EPB18-4 shows that as the same as most of the slide bearing materials, the friction factor of CSB-EPB18 is increasing along with the rotation speed under a certain loading while as shown in figure EPB18-5, it is decreased along with the increasing of loading when the operation speed is stable. From figure EPB18-6, it is found that the most suitable shaft roughness is Ra0.2 to Ra0.6. Smoother shaft or rougher shaft may result into friction factor increasing.
|Friction coef. µ||0.05~0.25||0.09||0.04||0.04|
Wearing and shaft material
Graph EPB18-7 shows the wearing is considerably affected by the shaft materials. Heat-treated steel shaft and carbon steel shaft is good for this bearing material. Graph EPB18-8 tells that CSB-EPB18 is suitable for hardened chrome steel and hardened steel shaft in rotation operation or oscillation operation.
CSB-EPB18 is good at chemical resistance against weak acidic medium and various kinds of lubricants.
The water absorb rate of CSB-EPB18 is 0.2% under the atmospheric pressure while it is 0.5% when the material is immerged into water. With its low water absorbability, the material is suitable for humid environment applications.
Disintegration could be possible for the material CSBEPB18 after long period of exposing under the UV ray and therefore the performance of the material will be reduced.
CSB-EPB18 The Interfit Tolerance
Tolerance after fit E10
Fit Housing H7
Fit Shaft h9
CSB Plastic is one of the leading China epb18 plastic plain bearings manufacturers and suppliers, and also a professional epb18 plastic plain bearings factory and company, we are always at your services.