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CSB塑料轴承产品05
CSB塑料轴承产品04
EPB1 Plastic plain bearings

Product properties

● This material is with low water absorb characteristic and high load capacity. It is widely used for the humidity condition and wear resistance requirement. The embedded special metal powder enables this material to be a detective one

● Continuous working temperature: -40℃/+110℃

● Suitable for medium and high load operation

● Maintenance-free dry operation

● Excellent thermal conductivity

● Good for low speed operation


Material properties 

Standard

Unit

CSB-EPB1

General properties

Color

-

-

Brown

Density 

ISO1183

g/cm3

1.53

Max. moisture absorption, 50%RH

ISO62

%

0.2

Max. water absorption

ISO62

%

0.5

Coefficient of sliding friction(steel)

ITS025

µ

0.08-0.20

Max. PV value

ITS026

N/mm2×m/s

0.50

Mechanical properties

Flexural modulus

ISO178

MPa

2600

Flexural strength

ISO178

MPa

65

Max. static load

ITS027

MPa

55

Max. dynamic load

ITS028

MPa

21

Shore hardness

ISO868

D

72

Physical and thermal properties

Long-term application temperature

ITS029

+110

Short-term application temperature 

ITS029

+160

Lowest application temperature

ITS029

-40

Thermal conductivity

ISO22007

W/m/K

0.26

Coefficient of thermal expansion 

ISO11359

K-1×10-5

8

Flammability

UL94

Class

HB

Electrical properties 

Volume resistance

IEC60093

Ω·cm

>1011

Surface resistance 

IEC60093

Ω

>1010

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

EPB1 Plastic plain bearings
Dimensions

▊ PV value

The max PV value of the CSB-EPB1 plastic bearings is 0.50N/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 EPB1-1).

EPB1_01-Plastic plain bearings PV value.jpg

▊ Load, speed and temperature

CSB-EPB1 allows the Max static load of 55Mpa, The max compressive deformation rate under the max load is listed in Graph EPB1-2, The actual load capacity of bearing is slightly less than 55Mpa, The bearing load is variable against the speed and temperature, Fast speed (Vmax: 1.0m/s) results into higher temperature (Tmax: 110℃) which decreases the load capacity of the bearing. Please refer to the Graph EPB1-3 for such variation.

EPB1_02-Plastic plain bearings load.jpgEPB1_03-Plastic plain bearings load and tepmerature.jpg

▊ Friction factor, wear and shaft material

▉ Friction factor

Graph EPB1-4 shows that as the same as most of the slide bearing materials, the friction factor of CSB-EPB1 is increasing along with the rotation speed under a certain loading while as shown in figure EPB1-5, it is decreased along with the increasing of loading when the operation speed is stable. From figure EPB1-6, it is found that the most suitable shaft roughness is Ra0.2 to Ra0.6. Smoother shaft or rougher shaft may result into friction factor increasing. 

CSB-EPB1
Dry
Grease
Oil
Water
Friction coef. μ
0.08~0.20
0.09
0.04
0.04



EPB1_04-Plastic plain bearings friction and speed.jpgEPB1_05-Plastic plain bearings friction and load.jpgEPB1_06-Plastic plain bearings friction and surface roughness of shaft.jpg

▊ Wearing and shaft material

Graph EPB1-8 shows the wearing is considerably affected by the shaft materials. Heat-treated steel shaft and carbon steel shaft is good for this bearing material. CSB-EPB1 is suitable for hardened chrome steel and hardened steel shaft in oscillation operation and is suitable for hardened chrome steel and hardened steel shaft in rotation operation.

EPB1_07-Plastic plain bearings wear and shaft materials.jpgEPB1_08-Plastic plain bearings wear and load.jpg

▊ Chemical resistance

CSB-EPB1 is good at chemical resistance against weak acidic medium and various kinds of lubricants.

▊ Water absorption

The moisture absorption of CSB-EPB1 plastic plain bearings is 0.2% in standard atmosphere. The max. water absorption is 0.5% in water . These values are very low, CSB-EPB1 plastic palin bearings is very well suited for used in wet applications.

EPB1_09-Plastic plain bearings moisture absorption.jpg

▊ UV resistance

Disintegration could be possible for the material CSB-EPB1 after long period of exposing under the UV ray and therefore the performance of the material will be reduced.

▊ Installation tolerances

CSB-EPB1 Tolerances after pressfit

Diameter [mm]
CSB-EPB1 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-EPB1 Plastic Plain Bearings

Type PDF
Size 588KB
Time 09-2021
No. CSB/CAT.062E
download

1036

MediumEPB1 bearings resistance
AlcoholResistant
HydrocarbonsNot resistant
Greases. oilsResistant
FuelsResistant
Diluted acidsConditionally resistant
Strong acidsNot resistant
Diluted alkalisNot resistant
Strong alkalisNot 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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