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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

Friction Factor
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.

CSB-EPB18
Dry
Grease
Oil
Water
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.

Chemical Resistance

CSB-EPB18 is good at chemical resistance against weak acidic medium and various kinds of lubricants.

Water Absorbability

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.

UV Resistance

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.

Bearing Installation

CSB-EPB18 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
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