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The Material Data Sheet

Material Properties Standard Unit EPB19
Density ISO1183 g/cm3 1.32
color

Grey
Max. moisture absorption at +23℃ /RH50%
ASTMD570 % 1.3
MAX. water absorption

% 3.7
Dynamic friction /steel(dry)


0.05-0.20
MAX.PV(dry)
N/mm2×m/s 0.7
Flexural modulus
ISO178 MPa 3000
Flexural strength at  +23℃ ISO178 MPa 100
Compressive strength

MPa 60
MAX.static pressure of the surface,+20
MPa 60
Shore hardness
ISO868 D 77
Continuous work temperature

-40/+150
Short-time work temperature

-40/+200
Thermal conductivity
ASTME1461 W/m*k 0.25
Linear coef. of thermal expansion at +23℃ ASTMD696 K-1×10-5 9
Flammability UL94
HB
Volume resistivity IEC60093 Ωcm 1×1015
Surface resistivity IEC60093 Ω 1×1015


Standard bearings
  • EPB19 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-EPB19 series bearing is 0.7N/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 EPB19-1).

The Relation of Load, Speed and Temperature

CSB-EPB19 allows the Max static load of 70Mpa, The max compressive deformation rate under the max load is listed in Graph EPB19-2, The actual load capacity of bearing is slightly less than 70Mpa, The bearing load is variable against the speed and temperature, Fast speed (Vmax: 1.5m/s) results into higher temperature (Tmax: 150℃) which decreases the load capacity of the bearing. Please refer to the Graph EPB19-3 for such variation.

The Friction Factor,Wearing and shaft material

Friction Factor
Graph EPB19-4 shows that the friction factor of CSBEPB19 is not sensitive to the operation speed. Graph EPB19-5 tells that the friction factor of CSB-EPB19 is decreased along with the loading increasing and will be relatively stable when the loading reaches 20 Mpa upwards. Graph EPB19-6 shows that the friction factor of CSB-EPB19 is not sensitive to the shaft surface roughness. Therefore, it is recommended a proper shaft surface roughness in the range of Ra0.3~0.6.

CSB-EPB19
Dry
Grease
Oil
Water
Friction coef. μ
0.05~0.20
0.09
0.04
0.04


Wearing and shaft material

Graph EPB19-7 shows CSB-EPB19 friction factor is variable against different shaft materials in rotation operation under loading of 2Mpa. Testing indicates that hardened shaft is best for rotation operation of CSBEPB19. The operation condition is better when CSBEPB19 is used against hardened steel shafts, high speed steel shaft and hardened chrome steel shaft under rotation operation. Graph EPB19-8x describes that hardened chrome steel is better for this material under high loading operation where as long as the increasing of the loading, the wearing of the bearing is relatively stable.

Chemical Resistance

CSB-EPB19 is good at chemical resistance against mild base, weak acidic medium and various kinds of lubricants.

Water Absorbability

The water absorb rate of CSB-EPB19 is 1.3% under the atmospheric pressure while it is 2.5% when the material is immerged into water. The application environment has to be considered because of its water absorb properties.

UV Resistance

The color of CSB-EPB19 could be dimmed when it is exposed into the UV ray. The material performance stays stable.

Bearing Installation

CSB-EPB19 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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Bearing Design System

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