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CSB塑料轴承产品05
CSB塑料轴承产品04
EPB3 Plastic plain bearings

Product properties

● Best for middle to high load applications. With the perfect combination of reinforced fibre and good lubrication feature, this material is suitbale to be used under the temperature of 130℃

● Continuous working temperature: -40℃/+130℃

● Suitable for medium and high load operation

● Maintenance-free dry operation

● Applicable for various shaft materials

● Good for rotation and oscillating operation

● Excellent dust resistance


Material properties 

Standard

Unit

CSB-EPB3

General properties

Color

-

-

Dark grey

Density 

ISO1183

g/cm3

1.46

Max. moisture absorption, 50%RH

ISO62

%

0.7

Max. water absorption

ISO62

%

4.0

Coefficient of sliding friction(steel)

ITS025

µ

0.08-0.18

Max. PV value

ITS026

N/mm2×m/s

0.45

Mechanical properties

Flexural modulus

ISO178

MPa

8500

Flexural strength

ISO178

MPa

210

Max. static load

ITS027

MPa

80

Max. dynamic load

ITS028

MPa

43

Shore hardness

ISO868

D

81

Physical and thermal properties

Long-term application temperature

ITS029

+130

Short-term application temperature 

ITS029

+220

Lowest application temperature

ITS029

-40

Thermal conductivity

ISO22007

W/m/K

0.24

Coefficient of thermal expansion 

ISO11359

K-1×10-5

9

Flammability

UL94

Class

HB

Electrical properties 

Volume resistance

IEC60093

Ω·cm

>1013

Surface resistance 

IEC60093

Ω

>1011

*ITS: CSB company's internal test standards. 

**Test temperatures are 23℃ unless otherwise stated.

EPB3 Plastic plain bearings
Dimensions

▊ PV value

The max PV value of the CSB-EPB3 plastic bearings is 0.45N/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 EPB3-1).

EPB3_01-Plastic plain bearings PV value.jpg

▊ Load, speed and temperature

CSB-EPB3 allows the Max static load of 80Mpa, The max compressive deformation rate under the max load is listed in Graph EPB3-2, The actual load capacity of bearing is slightly less than 80Mpa, The bearing load is variable against the speed and temperature, Fast speed (Vmax: 1.0m/s) results into higher temperature (Tmax: 130℃) which decreases the load capacity of the bearing. Please refer to the Graph EPB3-3 for such variation. 

EPB3_02-Plastic plain bearings load.jpgEPB3_03-Plastic plain bearings load and tepmerature.jpg

▊ Friction factor, wear and shaft material

▊ Friction factor 

The friction factor of the sliding bearings is relative to the bearing load, operation speed and the roughness of the shaft material.CSB-EPB3 Bearing Friction factor decreased along with the increasing of the loading (See Graph EPB3-5) and increased along with the increasing of the operation speed(See Graph EPB3-4). The above feature induces the CSB-EPB3 material is applicable for the high load and low speed operation while too smooth and too rough surface may result into the increasing of friction factor. The recommended surface roughness of CSB-EPB3 is Ra0.5~Ra0.8 (See Graph EPB3-6).

CSB-EPB3
Dry
Grease
Oil
Water
Friction coef. μ
0.08~0.18
0.09
0.04
0.04



EPB3_04-Plastic plain bearings friction and speed.jpgEPB3_05-Plastic plain bearings friction and load.jpgEPB3_06-Plastic plain bearings friction and surface roughness of shaft.jpg

▊ Wearing and shaft material

Test of the bearing against various shaft materials shows that the material CSB-EPB3 features the best performance where the shaft material is carbon steel and hard chrome steel under low loading. (See Graph EPB3-7 and Graph EPB3-8). Therefore, the higher the load is, the more critical the hardness of the shaft will have to be. The softer shaft will be worn off sooner and as a result, the bearing wearing will be increased. But when the loading is increased over 2Mpa, the wearing of the bearing will be better along with the increasing of the shaft hardness.

Refer to Graph EPB3-7 It shows that the material CSB-EPB3 is better under the oscillation operation comparing with the rotation operation. Under the same condition, the wearing feature of the oscillation operation is much better than that of the rotation operation. This feature is sharply improved under higher loading.

EPB3_07-Plastic plain bearings wear and shaft materials.jpgEPB3_08-Plastic plain bearings wear and load.jpg

 Chemical resistance

CSB-EPB3 is good at chemical resistance against weak acidic medium and various kinds of lubricants.

 Water absorption

The moisture absorption of CSB-EPB3 plastic plain bearings is 0.7% in standard atmosphere. The max. water absorption is 4.0% in water. The application environment has to be considered due to the high water absorbtion properties.

EPB3_09-Plastic plain bearings moisture absorption.jpg

 UV resistance

CSB-EPB3 can maintain its color unchanged when it is exposed into the UV ray. The material performance stays stable.


▊ Installation tolerances

CSB-EPB3 Tolerances after pressfit

Diameter [mm]
CSB-EPB3 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-EPB3 Plastic Plain Bearings

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

1358

MediumEPB3 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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