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CSB塑料轴承产品05
CSB塑料轴承产品04
EPB3G Plastic plain bearings

Product properties

● Optimized for middle load applications. It is suitable for low frequency motion and low cost requirement

● Continuous working temperature: -40℃/+100℃

● High load capacity

● Good economic ratio

● Dry operation and maintenance free

● Applicable for various shaft materials


Material properties 

Standard

Unit

CSB-EPB3G

General properties

Color

-

-

Black

Density 

ISO1183

g/cm3

1.37

Max. moisture absorption, 50%RH

ISO62

%

1.3

Max. water absorption

ISO62

%

5.5

Coefficient of sliding friction(steel)

ITS025

µ

0.05-0.15

Max. PV value

ITS026

N/mm2×m/s

0.30

Mechanical properties

Flexural modulus

ISO178

MPa

7700

Flexural strength

ISO178

MPa

190

Max. static load

ITS027

MPa

75

Max. dynamic load

ITS028

MPa

36

Shore hardness

ISO868

D

78

Physical and thermal properties

Long-term application temperature

ITS029

+100

Short-term application temperature 

ITS029

+160

Lowest application temperature

ITS029

-40

Thermal conductivity

ISO22007

W/m/K

0.24

Coefficient of thermal expansion 

ISO11359

K-1×10-5

11

Flammability

UL94

Class

HB

Electrical properties 

Volume resistance

IEC60093

Ω·cm

>1012

Surface resistance 

IEC60093

Ω

>1011

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

EPB3G Plastic plain bearings
Dimensions

 PV value

The max PV value of the CSB-EPB3G plastic bearings 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 EPB3G-1).

EPB3G_01-Plastic plain bearings PV value.jpg

▊ Load, speed and temperature

CSB-EPB3G allows the Max static load of 75Mpa, The max compressive deformation rate under the max load is listed in Graph EPB3G-2, The actual load capacity of bearing is slightly less than 75Mpa, The bearing load is variable against the speed and temperature, Fast speed (Vmax: 0.8m/s) results into higher temperature (Tmax: 100℃) which decreases the load capacity of the bearing. Please refer to the Graph EPB3G-3 for such variation. 

EPB3G_02-Plastic plain bearings load.jpgEPB3G_03-Plastic plain bearings load and tepmerature.jpg

▊ Friction factor, wear and shaft material

 Friction factor 

Graph EPB3G-4 and Graph EPB3G-5 show that the friction factor of CSB-EPB3G is variable along with the changing of the operation speed and bearing loading especially when the bearing loading is within 20Mpa. In the mean while the Graph EPB3G-6 shows that the friction factor of CSB-EPB3G is also affected by the shaft surface roughness. Too rough shaft surface or too fine shaft surface will increase the wearing and friction factor. The recommended shaft surface roughness is Ra0.1~0.3.

CSB-EPB3G
Dry
Grease
Oil
Water
Friction coef. μ
0.05~0.15
0.09
0.04
0.04



EPB3G_04-Plastic plain bearings friction and speed.jpgEPB3G_05-Plastic plain bearings friction and load.jpgEPB3G_06-Plastic plain bearings friction and surface roughness of shaft.jpg

 Wearing and shaft material

Graph EPB3G-7 and Graph EPB3G-8 show that the wearing of CSB-EPB3G is similar either against the normal shaft or hardened shaft. The most suitable shaft materials for CSB-EPB3G are hardened steel and hardened chrome steel. Graph EPB3G-7 shows that the wearing feature is better in oscillation operation than in rotation operation.

EPB3G_07-Plastic plain bearings wear and shaft materials.jpgEPB3G_08-Plastic plain bearings wear and load.jpg

 Chemical resistance

CSB-EPB3G is good at chemical resistance against weak acidic medium and various kinds of lubricants.

 Water absorption

The moisture absorption of CSB-EPB3G plastic plain bearings is 1.3% in standard atmosphere. The max. water absorption is 5.5% in water. The application environment has to be considered due to the high water absorbtion properties.

EPB3G_09-Plastic plain bearings moisture absorption.jpg

 UV resistance

CSB-EPB3G can maintain its color unchanged when it is exposed into the UV ray. The material performance stays stable.

▊ Installation tolerances

CSB-EPB3G Tolerances after pressfit

Diameter [mm]
CSB-EPB3G 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-EPB3G Plastic Plain Bearings

Type PDF
Size 584KB
Time 09-2021
No. CSB/CAT.062E
download

953

MediumEPB3G 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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