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The Material Data Sheet

Material Properties Standard Unit EPB9
Density ISO1183 g/cm3 1.24
color

Black
Max. moisture absorption at +23℃ /RH50%
ASTMD570 % 1.8
MAX. water absorption

% 8.4
Dynamic friction /steel(dry)


0.10-0.40
MAX.PV(dry)
N/mm2×m/s 0.3
Flexural modulus
ISO178 MPa 11000
Flexural strength at  +23℃ ISO178 MPa 250
Compressive strength

MPa 100
MAX.static pressure of the surface,+20
MPa 105
Shore hardness
ISO868 D 84
Continuous work temperature

-40/+130
Short-time work temperature

-40/+180
Thermal conductivity
ASTME1461 W/m*k 0.6
Linear coef. of thermal expansion at +23℃ ASTMD696 K-1×10-5 11
Flammability UL94
HB
Volume resistivity IEC60093 Ωcm 1×103
Surface resistivity IEC60093 Ω 1×103


Standard bearings
  • EPB9 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-EPB9 series bearing is 0.3N/ 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 EPB9-1).

The Relation of Load, Speed and Temperature

CSB-EPB9 allows the Max static load of 105Mpa, The max compressive deformation rate under the max load is listed in Graph EPB9-2, The actual load capacity of bearing is slightly less than 105Mpa, The bearing load is variable against the speed and temperature, Fast speed (Vmax: 0.8m/s) results into higher temperature (Tmax: 130℃) which decreases the load capacity of the bearing. Please refer to the Graph EPB9-3 for such variation.

The Friction Factor,Wearing and shaft material

Friction Factor
Graph EPB9-4 shows that the friction factor of CSB-EPB9 is much higher than those of other materials because the electronic conductive fiber is embedded into the bearing material. It is induced that the friction performance will be better when the bearing is lubricated. Graph EPB9-5 shows that the friction factory is decreasing along with the loading increasing and Graph EPB9-6 shows that the friction factor is increasing along with the shaft roughness increasing when the shaft roughness is between Ra0.1 to Ra0.5. This effecting will be less when the shaft roughness is between Ra0.5 to Ra1.6.

CSB-EPB9
Dry
Grease
Oil
Water
Friction coef. μ
0.10~0.40
0.09
0.04
0.04


Wearing and shaft material

Graph EPB9-7 shows the different results of the material against different shaft materials. It induces that the bearing material is good for hard chrome steel shaft under low loading operation condition and good for hardened carbon steel shaft under high loading rotation operation.

Chemical Resistance

CSB-EPB9 is good at chemical resistance against weak acidic medium and various kinds of lubricants.

Water Absorbability

The water absorb rate of CSB-EPB9 is 1.5% under the atmospheric pressure while it is 7.6% when the material is immerged into water. The application environment has to be considered because of its water absorb properties.

UV Resistance

When CSB-EPB9 is exposed into the UV ray, the material performance stays stable.

Bearing Installation

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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Bearing Design System

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