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CSB塑料轴承产品05
CSB塑料轴承产品04
EPB24 Plastic plain bearings

Product properties

● Standard material for automotive industrial. Best and economic material for high temperature application. Excellent wear resistance is available in the vehicle fuels. 

● Continuous working temperature: -40℃/+200℃

● High temperature and lower cost

● High wear resistance under fuel oil

● Good chemical resistance

● Suitable for humid environment


Material properties 

Standard

Unit

CSB-EPB24

General properties

Color

-

-

Brown

Density 

ISO1183

g/cm3

1.72

Max. moisture absorption, 50%RH

ISO62

%

0.1

Max. water absorption

ISO62

%

0.2

Coefficient of sliding friction(steel)

ITS025

µ

0.08-0.25

Max. PV value

ITS026

N/mm2×m/s

0.60

Mechanical properties

Flexural modulus

ISO178

MPa

10000

Flexural strength

ISO178

MPa

210

Max. static load

ITS027

MPa

110

Max. dynamic load

ITS028

MPa

58

Shore hardness

ISO868

D

81

Physical and thermal properties

Long-term application temperature

ITS029

+200

Short-term application temperature 

ITS029

+240

Lowest application temperature

ITS029

-40

Thermal conductivity

ISO22007

W/m/K

0.24

Coefficient of thermal expansion 

ISO11359

K-1×10-5

5

Flammability

UL94

Class

V0

Electrical properties 

Volume resistance

IEC60093

Ω·cm

>1013

Surface resistance 

IEC60093

Ω

>1012

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

EPB24 Plastic plain bearings
Dimensions

 PV value

The max PV value of the CSB-EPB24 plastic bearings is 0.6N/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 EPB24-1).

EPB24_01-Plastic plain bearings PV value.jpg

▊ Load, speed and temperature

CSB-EPB24 allows the Max static load of 110Mpa, The max compressive deformation rate under the max load is listed in Graph EPB24-1, The actual load capacity of bearing is slightly less than 110Mpa, The bearing load is variable against the speed and temperature, Fast speed (Vmax: 1.0m/s) results into higher temperature (Tmax: 200℃) which decreases the load capacity of the bearing. Please refer to the Graph EPB24-3 for such variation. 

EPB24_02-Plastic plain bearings load.jpgEPB24_03-Plastic plain bearings load and tepmerature.jpg

▊ Friction factor, wear and shaft material

 Friction factor

Graph EPB24-4 shows the friction factor of CSB-EPB24 is not obviously effected by the operation speed when the loading is stable and Graph EPB24-5 shows it will be decreasing along with the loading is increased from 0 to 20 Mpa when the operation speed is unchanged, furthermore the friction factor will not be changed when the loading reaches 20Mpa upward. The friction factor of CSB-EPB24 is increased along with the increasing of the shaft roughness. The recommended shaft roughness is Ra0.1 to Ra0.6.

CSB-EPB24
Dry
Grease
Oil
Water
Friction coef. μ
0.08~0.25
0.09
0.04
0.04



EPB24_04-Plastic plain bearings friction and speed.jpgEPB24_05-Plastic plain bearings friction and load.jpgEPB24_06-Plastic plain bearings friction and surface roughness of shaft.jpg

 Wearing and shaft material

Graph EPB24-7 and Graph EPB24-8 tells that the CSB-EPB24 is very good for Hardened shaft and soft shaft and it features excellent both on hardened steel shaft and carbon steel shaft but the hardened chrome steel shaft is not good for CSB-EPB24 bearings. The wearing of CSB-EPB24 is better on oscillation operation than on rotation operation. The wearing will be increased when the loading is over 10Mpa.

EPB24_07-Plastic plain bearings wear and shaft materials.jpgEPB24_08-Plastic plain bearings wear and load.jpg

 Chemical resistance

The Chemical Resistance of CSB-EPB24 is fairly good against most of Acid and Alkalis.

 Water absorption

The moisture absorption of CSB-EPB24 plastic plain bearings is 0.1% in standard atmosphere. The max. water absorption is 0.2% in water . These values are very low, CSB-EPB24 plastic palin bearings is very well suited for used in wet applications.

EPB24_09-Plastic plain bearings moisture absorption.jpg

 UV resistance

Disintegration could be possible for the material CSB-EPB24 after long period of exposing under the UV ray and therefore the compressive strength will be reduced.

▊ Installation tolerances

CSB-EPB24 Tolerances after pressfit

Diameter [mm]
CSB-EPB24 F10 [mm]
Housing H7 [mm]
Shaft h9 [mm]
>0~3
+0.006~+0.046
0~+0.010
0~-0.025
>3~6
+0.010~+0.058
0~+0.012
0~-0.030
>6~10
+0.013~+0.071
0~+0.015
0~-0.036
>10~18
+0.016~+0.086
0~+0.018
0~-0.043
>18~30
+0.020~+0.104
0~+0.021
0~-0.052
>30~50
+0.025~+0.125
0~+0.025
0~-0.062
>50~80
+0.030~+0.150
0~+0.030
0~-0.074
>80~120
+0.036~+0.176
0~+0.035
0~-0.087
>120~180
+0.043~+0.203
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-EPB24 Plastic Plain Bearings

Type PDF
Size 590KB
Time 09-2021
No. CSB/CAT.062E
download

1078

MediumEPB24 bearings resistance
AlcoholResistant
HydrocarbonsResistant
Greases. oilsResistant
FuelsResistant
Diluted acidsConditionally resistant
Strong acidsConditionally resistant
Diluted alkalisResistant
Strong alkalisResistant
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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