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The Material Data Sheet

Material Properties Standard Unit EPB5A
Density ISO1183 g/cm3 1.28
color

Beige
Max. moisture absorption at +23℃ /RH50%
ASTMD570 % 0.3
MAX. water absorption

% 0.5
Dynamic friction /steel(dry)


0.25-0.40
MAX.PV(dry)
N/mm2×m/s 0.6
Flexural modulus
ISO178 MPa 3600
Flexural strength at  +23℃ ISO178 MPa 140
Compressive strength

MPa 118
MAX.static pressure of the surface,+20
MPa 120
Shore hardness
ISO868 D 83
Continuous work temperature

-100/+250
Short-time work temperature

-100/+315
Thermal conductivity
ASTME1461 W/m*k 0.24
Linear coef. of thermal expansion at +23℃ ASTMD696 K-1×10-5 9
Flammability UL94
VO
Volume resistivity IEC60093 Ωcm 1×1014
Surface resistivity IEC60093 Ω 1×1013


Standard bearings
  • EPB5A Plastic Plain Bearings,Metric size
  • Product code:
  • Inner diameter d1[mm]:
  • Outer diameter d2[mm]:
  • Height L[mm]:
  • Flanges outer diameter d3[mm]:
  • Flanges thickness t[mm]:
  • d1-Min.tolerance[mm]:
  • d1-Max.tolerance[mm]:
  • d2-Min.tolerance[mm]:
  • d2-Max.tolerance[mm]:
  • L-Min.tolerance[mm]:
  • L-Max.tolerance[mm]:
  • Shaft-Min.tolerance[mm]:
  • Shaft-Max.tolerance[mm]:
  • Housing-Min.tolerance[mm]:
  • Housing-Max.tolerance[mm]:

PV Value of Bearings

The max PV value of the CSB-EPB5A series bearing is 0.9N/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 EPB5A-1).

The Relation of Load, Speed and Temperature

CSB-EPB5A allows the Max static load of 120Mpa, The max compressive deformation rate under the max load is listed in Graph EPB5A-2, The actual load capacity of bearing is slightly less than 120Mpa, The bearing load is variable against the speed and temperature, Fast speed (Vmax: 0.6m/s) results into higher temperature (Tmax: 250℃) which decreases the load capacity of the bearing. Please refer to the Graph EPB5A-3 for such variation.


The Friction Factor,Wearing and shaft material

Friction Factor
CSB-EPB5A Bearing Friction factor is increased along with the increasing of the operation speed under certain loading (See Graph EPB5A-4). The friction factor of CSBEP5A is decreased along with the loading increasing not over 20Mpa (see Graph EPB5A-5). The friction factor will not change much along with the speed when the loading is over 20Mpa. The Graph EPB5A-6 shows that the bearing could achieve its best performance when the counter shaft surface roughness is around Ra0.4 to Ra0.9.

CSB-EPB5A
Dry
Grease
Oil
Water
Friction coef. μ
0.09~0.25
0.09
0.04
0.04


Wearing and shaft material

Graph EPB5A-7 and Graph EPB5A-8 show the test results of the material CSB-EPB5A running against different shaft materials. It is suitable for hard Aluminum and hard chrome steel shaft. The hard chrome steel shaft will be better when the loading is getting heavier. Graph EPB5A-7 shows CSB-EPB5A is good for oscillation operation. Specially, from the Graph EPB5A-8, it is read that CSB-EPB5A is with better performance under high temperature around 150℃ comparing with under the ambient temperature of 23℃.

Chemical Resistance

Chemical Resistance of CSB-EPB5A is very good. It can work well in the heavy acid of 65%.

Water Absorbability

The water absorb rate of CSB-EPB5A is less than 0.1% under the atmospheric pressure while it is 0.5% when the material is immerged into water. The material performance and dimensions of the material is stabilized for the applications under humid environment.

UV Resistance

CSB-EPB5A can maintain its performance to be stable even exposed in the UV ray for long period.

Bearing Installation

CSB-EPB5A 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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