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CSB塑料轴承产品05
CSB塑料轴承产品04
EPB5A Plastic plain bearings

Product properties

● Continuous working temperature: -100℃/+250℃

● Suitable for high load and lovo speed operation 

● High load capacity at higher temperature

● Good chemical resistance

● FDA grade


Material properties 

Standard

Unit

CSB-EPB5A

General properties

Color

-

-

Beige

Density 

ISO1183

g/cm3

1.28

Max. moisture absorption, 50%RH

ISO62

%

0.3

Max. water absorption

ISO62

%

0.5

Coefficient of sliding friction(steel)

ITS025

µ

0.25-0.40

Max. PV value

ITS026

N/mm2×m/s

0.25

Mechanical properties

Flexural modulus

ISO178

MPa

3600

Flexural strength

ISO178

MPa

140

Max. static load

ITS027

MPa

90

Max. dynamic load

ITS028

MPa

46

Shore hardness

ISO868

D

80

Physical and thermal properties

Long-term application temperature

ITS029

+250

Short-term application temperature 

ITS029

+300

Lowest application temperature

ITS029

-100

Thermal conductivity

ISO22007

W/m/K

0.24

Coefficient of thermal expansion 

ISO11359

K-1×10-5

9

Flammability

UL94

Class

V0

Electrical properties 

Volume resistance

IEC60093

Ω·cm

>1014

Surface resistance 

IEC60093

Ω

>1013

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

EPB5A Plastic plain bearings
Dimensions

 PV value

The max PV value of the CSB-EPB5A plastic bearings is 0.25N/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 EPB5A-1).

EPB5A_01-Plastic plain bearings PV value.jpg

▊ Load, speed and temperature

CSB-EPB5A allows the Max static load of 90Mpa, The max compressive deformation rate under the max load is listed in Graph EPB5A-2, The actual load capacity of bearing is slightly less than 90Mpa, The bearing load is variable against the speed and temperature, Fast speed (Vmax: 0.6m/s) results into higher temperature (Tmax: 250℃) which decreases the load capacity of the bearing. Please refer to the Graph EPB5A-3 for such variation. 

EPB5A_02-Plastic plain bearings load.jpgEPB5A_03-Plastic plain bearings load and tepmerature.jpg

▊ Friction factor, wear and shaft material

 Friction factor

CSB-EPB5A Bearing Friction factor is increased along with the increasing of the operation speed under certain loading (See Graph EPB5A-4).  The friction factor of CSB-EP5A is decreased along with the loading increasing not over 20Mpa (see Graph EPB5A-5).  The friction factor will not change much along with the speed when the loading is over 20Mpa. The Graph EPB5A-6 shows that the bearing could achieve its best performance when the counter shaft surface roughness is around Ra0.4 to Ra0.9.

CSB-EPB5A
Dry
Grease
Oil
Water
Friction coef. μ
0.25~0.40
0.09
0.04
0.04



EPB5A_04-Plastic plain bearings friction and speed.jpgEPB5A_05-Plastic plain bearings friction and load.jpgEPB5A_06-Plastic plain bearings friction and surface roughness of shaft.jpg

 Wearing and shaft material

Graph EPB5A-7 and Graph EPB5A-8 show the test results of the material CSB-EPB5A running against different shaft materials. It is suitable for hard Aluminum and hard chrome steel shaft. The hard chrome steel shaft will be better when the loading is getting heavier. Graph EPB5A-7 shows CSB-EPB5A is good for oscillation operation. 

EPB5A_07-Plastic plain bearings wear and shaft materials.jpgEPB5A_08-Plastic plain bearings wear and load.jpg

 Chemical resistance

Chemical Resistance of CSB-EPB5A is very good. It can work well in the heavy acid of 65%.

 Water absorption

The moisture absorption of CSB-EPB5A plastic plain bearings is 0.3% in standard atmosphere. The max. water absorption is 0.5% in water . These values are very low, CSB-EPB5A plastic palin bearings is very well suited for used in wet applications.

EPB5A_09-Plastic plain bearings moisture absorption.jpg

 UV resistance

CSB-EPB5A can maintain its performance to be stable even exposed in the UV ray for long period.


▊ Installation tolerances

CSB-EPB5A Tolerances after pressfit

Diameter [mm]
CSB-EPB5A 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-EPB5A Plastic Plain Bearings

Type PDF
Size 581KB
Time 09-2021
No. CSB/CAT.062E
download

1009

MediumEPB5A bearings resistance
AlcoholResistant
HydrocarbonsResistant
Greases. oilsResistant
FuelsResistant
Diluted acidsResistant
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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