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The Material Data Sheet

Material Properties Standard Unit EPB2D
Density ISO1183 g/cm3 1.40
color

Green
Max. moisture absorption at +23℃ /RH50%
ASTMD570 % 0.2
MAX. water absorption

% 1.1
Dynamic friction /steel(dry)


0.05-0.25
MAX.PV(dry)
N/mm2×m/s 0.3
Flexural modulus
ISO178 MPa 2000
Flexural strength at  +23℃ ISO178 MPa 75
Compressive strength

MPa 60
MAX.static pressure of the surface,+20
MPa 25
Shore hardness
ISO868 D 74
Continuous work temperature

-40/+80
Short-time work temperature

-40/+120
Thermal conductivity
ASTME1461 W/m*k 0.25
Linear coef. of thermal expansion at +23℃ ASTMD696 K-1×10-5 11
Flammability UL94
HB
Volume resistivity IEC60093 Ωcm 1×1013
Surface resistivity IEC60093 Ω 1×1012


Standard bearings
  • EPB2D 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-EPB2D 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 EPB2D-1).

The Relation of Load, Speed and Temperature

CSB-EPB2D allows the Max static load of 25Mpa, The max compressive deformation rate under the max load is listed in Graph EPB2D-2, The actual load capacity of bearing is slightly less than 25Mpa, The bearing load is variable against the speed and temperature, Fast speed (Vmax: 1.2m/s) results into higher temperature (Tmax:80℃) which decreases the load capacity of the bearing.Please refer to the Graph EPB2D-3 for such variation.

The Friction Factor,Wearing and shaft material

Friction Factor
Graph EPB2D-4 shows that the friction factor of CSBEPB2D is initially increased along with the operation speed increasing when the loading is stable but when the speed reaches over 0.25m/s, it is decreased along with the operation speed increasing. Graph EPB2D-5 shows that the friction factor of CSB-EPB2D is decreasing along with the loading increasing when the operation speed is stable. Graph EPB2D-6 shows the friction factor of CSBEPB2D is sensitive to the shaft roughness. The best shaft roughness for this material is Ra0.3~0.6.

CSB-EPB2D
Dry
Grease
Oil
Water
Friction coef. μ
0.05~0.25
0.09
0.04
0.04


Wearing and shaft material

Graph EPB2D-7 and Graph EPB2D-8 shows that the hardened chrome steel shaft is good for CSB-EPB2D bearings under lower loading and stainless steel shaft is better when the loading is over 1.0Mpa. Graph EPB2D-8 shows hardened steel shaft is recommended in rotation operation but hardened chrome steel shaft is recommended in oscillation operation.

Chemical Resistance

CSB-EPB2D is good at chemical resistance against mild base, weak acidic medium and various kinds of lubricants.

Water Absorbability

The water absorb rate of CSB-EPB2D is 0.2% under the atmospheric pressure while it is 1.1% when the material is immerged into water. With its low water absorbability, the material is suitable for humid environment applications.

UV Resistance

The color of CSB-EPB2D will become lighter when it is exposed into the UV ray. The hardness, Compressive strength and wear resistance of the material is also stable under such condition.

Bearing Installation

CSB-EPB2D 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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