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CSB塑料轴承产品05
CSB塑料轴承产品04
EPB3M Plastic plain bearings

Product properties

● An excellent self-lubricated material suitable for impact resistance applications which is widedly used under the evironment of impact absorbing and weare resistance requirement 

● Continuous working temperature: -40℃/+80℃

● High load capacity, Impact resistance

● Low cost

● Dry operation and maintenance free

● Good for Marginal Load

● Suitable for low speed operation


Material properties 

Standard

Unit

CSB-EPB3M

General properties

Color

-

-

Dark grey

Density 

ISO1183

g/cm3

1.14

Max. moisture absorption, 50%RH

ISO62

%

1.4

Max. water absorption

ISO62

%

7.6

Coefficient of sliding friction(steel)

ITS025

µ

0.09-0.30

Max. PV value

ITS026

N/mm2×m/s

0.15

Mechanical properties

Flexural modulus

ISO178

MPa

2700

Flexural strength

ISO178

MPa

100

Max. static load

ITS027

MPa

30

Max. dynamic load

ITS028

MPa

15

Shore hardness

ISO868

D

79

Physical and thermal properties

Long-term application temperature

ITS029

+80

Short-term application temperature 

ITS029

+170

Lowest application temperature

ITS029

-40

Thermal conductivity

ISO22007

W/m/K

0.24

Coefficient of thermal expansion 

ISO11359

K-1×10-5

10

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.

EPB3M Plastic plain bearings
Dimensions

 PV value

The max PV value of the CSB-EPB3M plastic bearings is 0.15N/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 EPB3M-1).

EPB3M_01-Plastic plain bearings PV value.jpg

▊ Load, speed and temperature

CSB-EPB3M allows the Max static load of 30Mpa, The max compressive deformation rate under the max load is listed in Graph EPB3M-2, The actual load capacity of bearing is slightly less than 30Mpa, The bearing load is variable against the speed and temperature, Fast speed (Vmax: 0.8m/s) results into higher temperature (Tmax: 80℃) which decreases the load capacity of the bearing. Please refer to the Graph EPB3M-3 for such variation. 

EPB3M_02-Plastic plain bearings load.jpgEPB3M_03-Plastic plain bearings load and tepmerature.jpg

▊ Friction factor, wear and shaft material

 Friction factor 

CSB-EPB3M Bearing Friction factor is increased along with the increasing of the operation speed (See Graph EPB3M-4) therefore it is suitable for the application under low speed operation. The friction factor of CSB-EP3M is decreased along with the loading increasing (see Graph EPB3M-5). The friction factor and wearing of the bearing is considerably affected by the counter shaft roughness. The Graph EPB3M-6 shows that the bearing could achieve its best performance when the counter shaft surface roughness is around Ra0.6.

CSB-EPB3M
Dry
Grease
Oil
Water
Friction coef. μ
0.09~0.30
0.09
0.04
0.04



EPB3M_04-Plastic plain bearings friction and speed.jpgEPB3M_05-Plastic plain bearings friction and load.jpgEPB3M_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-EPB3M features the wearing performance of the material is not sensitive with different materials where the loading is over 2Mpa. (See Graph EPB3M-7). The bearing performance remains the best when the loading is in the lower range. When the loading is increased, the wearing will be sharply increased. From the Graph EPB3M-8, the CSB-EPB3M material is better for the application with the counter shaft material of hard chrome steel. Graph EPB3M-7 shows that the material is better for rotation operation than oscillation operation.

EPB3M_07-Plastic plain bearings wear and shaft materials.jpgEPB3M_08-Plastic plain bearings wear and load.jpg

 Chemical resistance

CSB-EPB3M is good at chemical resistance against weak acidic medium and various kinds of lubricants.

 Water absorption

The moisture absorption of CSB-EPB3M plastic plain bearings is 1.4% in standard atmosphere. The max. water absorption is 7.6% in water. The application environment has to be considered due to the high water absorbtion properties.

EPB3M_09-Plastic plain bearings moisture absorption.jpg

 UV resistance

CSB-EPB3M can maintain its color unchanged when it is exposed into the UV ray. The material performance stays stable.

▊ Installation tolerances

CSB-EPB3M Tolerances after pressfit

Diameter [mm]
CSB-EPB3M D11 [mm]
Housing H7 [mm]
Shaft h9 [mm]
>0~3
+0.020~+0.080
0~+0.010
0~-0.025
>3~6
+0.030~+0.105
0~+0.012
0~-0.030
>6~10
+0.040~+0.130
0~+0.015
0~-0.036
>10~18
+0.050~+0.160
0~+0.018
0~-0.043
>18~30
+0.065~+0.195
0~+0.021
0~-0.052
>30~50
+0.080~+0.240
0~+0.025
0~-0.062
>50~80
+0.100~+0.290
0~+0.030
0~-0.074
>80~120
+0.120~+0.340
0~+0.035
0~-0.087
>120~180
+0.145~+0.395
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-EPB3M Plastic Plain Bearings

Type PDF
Size 592KB
Time 09-2021
No. CSB/CAT.062E
download

1050

MediumEPB3M 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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