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The Material Data Sheet

Material Properties Standard Unit EPB3M
Density ISO1183 g/cm3 1.15
color

Dark Grey
Max. moisture absorption at +23℃ /RH50%
ASTMD570 % 1.4
MAX. water absorption

% 7.6
Dynamic friction /steel(dry)


0.09-0.30
MAX.PV(dry)
N/mm2×m/s 0.2
Flexural modulus
ISO178 MPa 2500
Flexural strength at  +23℃ ISO178 MPa 110
Compressive strength

MPa 50
MAX.static pressure of the surface,+20
MPa 20
Shore hardness
ISO868 D 79
Continuous work temperature

-40/+80
Short-time work temperature

-40/+170
Thermal conductivity
ASTME1461 W/m*k 0.25
Linear coef. of thermal expansion at +23℃ ASTMD696 K-1×10-5 10
Flammability UL94
HB
Volume resistivity IEC60093 Ωcm 1×1012
Surface resistivity IEC60093 Ω 1×1011


Standard bearings
  • EPB3M 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-EPB3M series bearing is 0.2N/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 EPB3M-1).

The Relation of Load, Speed and Temperature

CSB-EPB3M allows the Max static load of 20Mpa, The max compressive deformation rate under the max load is listed in Graph EPB3M-2, The actual load capacity of bearing is slightly less than 20Mpa, The bearing load is variable against the speed and temperature, Fast speed (Vmax: 0.8m/s) results into higher temperature (Tmax:80℃) which decreases the load capacity of the bearing.Please refer to the Graph EPB3M-3 for such variation.

The Friction Factor,Wearing and shaft material

Friction Factor
CSB-EPB3M Bearing Friction factor is increased along with the increasing of the operation speed (See Graph EPB3M-4) therefore it is suitable for the application under low speed operation. The friction factor of CSB-EP3M is decreased along with the loading increasing (see Graph EPB3M-5). The friction factor and wearing of the bearing is considerably affected by the counter shaft roughness. The Graph EPB3M-6 shows that the bearing could achieve its best performance when the counter shaft surface roughness is around Ra0.6.

CSB-EPB3M
Dry
Grease
Oil
Water
Friction coef. μ
0.10~0.30
0.09
0.04
0.04


Wearing and shaft material

Test of the bearing against various shaft materials shows that the material CSB-EPB3M features the wearing performance of the material is not sensitive with different materials where the loading is over 2Mpa. (See Graph EPB3M-7). The bearing performance remains the best when the loading is in the lower range. When the loading is increased, the wearing will be sharply increased. From the Graph EPB3M-8, the CSB-EPB3M material is better for the application with the counter shaft material of hard chrome steel. Graph EPB3M-8 shows that the material is better for rotation operation than oscillation operation.

Chemical Resistance

CSB-EPB3M is good at chemical resistance against weak acidic medium and various kinds of lubricants.

Water Absorbability

The water absorb rate of CSB-EPB3M is 1.4% 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

CSB-EPB3M can maintain its color unchanged when it is exposed into the UV ray. The material performance stays stable.

Bearing Installation

CSB-EPB3M The Interfit Tolerance

Diameter mm
Tolerance after fit E10
Fit Housing H7
Fit Housing 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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