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CSB塑料轴承产品05
CSB塑料轴承产品04
EPB9 Plastic plain bearings

Product properties

● Self-lubricated material with good elctricity conductivity. Mainly used with the high load and electricity conductive evironment

● Continuous working temperature: -40℃/+140℃

● Specially use for static electricity existing environment

● Suitable for low speed operation

● Higher load capacity


Material properties 

Standard

Unit

CSB-EPB9

General properties

Color

-

-

Black

Density 

ISO1183

g/cm3

1.28

Max. moisture absorption, 50%RH

ISO62

%

1.3

Max. water absorption

ISO62

%

6.5

Coefficient of sliding friction(steel)

ITS025

µ

0.10-0.40

Max. PV value

ITS026

N/mm2×m/s

0.35

Mechanical properties

Flexural modulus

ISO178

MPa

10000

Flexural strength

ISO178

MPa

250

Max. static load

ITS027

MPa

105

Max. dynamic load

ITS028

MPa

58

Shore hardness

ISO868

D

82

Physical and thermal properties

Long-term application temperature

ITS029

+140

Short-term application temperature 

ITS029

+180

Lowest application temperature

ITS029

-40

Thermal conductivity

ISO22007

W/m/K

0.60

Coefficient of thermal expansion 

ISO11359

K-1×10-5

11

Flammability

UL94

Class

HB

Electrical properties 

Volume resistance

IEC60093

Ω·cm

<103

Surface resistance 

IEC60093

Ω

<103

*ITS: CSB company's internal test standards.   **Test temperatures are 23℃ unless otherwise stated.

EPB9 Plastic plain bearings
Dimensions

 PV value

The max PV value of the CSB-EPB9 plastic bearings is 0.35N/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).

EPB9_01-Plastic plain bearings PV value.jpg

▊ 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: 140℃) which decreases the load capacity of the bearing. Please refer to the Graph EPB9-3 for such variation. 

EPB9_02-Plastic plain bearings load.jpgEPB9_03-Plastic plain bearings load and tepmerature.jpg

▊ Friction factor, wear 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



EPB9_04-Plastic plain bearings friction and speed.jpgEPB9_05-Plastic plain bearings friction and load.jpgEPB9_06-Plastic plain bearings friction and surface roughness of shaft.jpg

 Wearing and shaft material

Graph EPB9-7 and EPB9-8 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. 

EPB9_07-Plastic plain bearings wear and shaft materials.jpgEPB9_08-Plastic plain bearings wear and load.jpg

 Chemical resistance

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

 Water absorption

The moisture absorption of CSB-EPB9 plastic plain bearings is 1.3% in standard atmosphere. The max. water absorption is 6.5% in water. The application environment has to be considered due to the high water absorbtion properties.

EPB9_09-Plastic plain bearings moisture absorption.jpg

 UV resistance

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

▊ Installation tolerances

CSB-EPB9 Tolerances after pressfit

Diameter [mm]
CSB-EPB9 E10 [mm]
Housing H7 [mm]
Shaft h9 [mm]
>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


CSB-EPB® Plastic Bearings Finder[V2.0] is based on the analysis and calculation of a large number of test data in CSB® laboratory. You can calculations material data by entering parameters such as bearing load, speed, and temperature, and finally output material adaptation data.
Because the system calculate and analyze based on lab data, it can't exactly meet the ractual use requirements absolutly. The system data verification has certain limitations; CSB® recommends that the bearing must be tested again to verify whether it meets the actual use requirements.
CSB-EPB® Plastic Bearings Finder output data information is only for design reference, and can not be used as the final standard for determining the bearing material conformity, If you have any questions, please contact CSB® sales engineers.

CSB-SFP® Semi-finished Products Finder[V2.0] is based on the analysis and calculation of a large number of test data in CSB® laboratory. You can calculations material data by entering parameters such as bearing load, speed, and temperature, and finally output material adaptation data.
Because the system calculate and analyze based on lab data, it can't exactly meet the ractual use requirements absolutly. The system data verification has certain limitations; CSB® recommends that the products must be tested again to verify whether it meets the actual use requirements.
CSB-SFP® Semi-finished Products Finder output data information is only for design reference, and can not be used as the final standard for determining the bearing material conformity, If you have any questions, please contact CSB® sales engineers.

CSB-EPB9 Plastic Plain Bearings

Type PDF
Size 582KB
Time 09-2021
No. CSB/CAT.062E
download

1153

MediumEPB9 bearings resistance
AlcoholResistant
HydrocarbonsResistant
Greases. oilsResistant
FuelsResistant
Diluted acidsConditionally resistant
Strong acidsNot resistant
Diluted alkalisResistant
Strong alkalisConditionally resistant
CSB® Bearing Material Chemical Resistance

Please select bearing material and medium...

CSB® bearing material chemical resistance data is a comparison test result of the CSB chemistry laboratory using laboratory specimens or similar chemicals at room temperature 23 ℃, without considering the impact of other temperatures and chemical medium mixtures on the chemical resistance of CSB® bearing materials ; Therefore, this data can only act as a reference. CSB® recommends that the chemical resistance of actual parts should be tested under application conditions and verify the suitability of the bearings.

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