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  5. EPB2D Plastic plain bearings
EPB2D Plastic plain bearings

Product properties

● The combination of middle to low load and low speed application requirement. It is a material without PTFE embedded for the low cost and big quantity demanding 

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

● Very common; suitable for most average and low load

● Maintenance-free dry operation

● Light wear against different shaft materials

● Low friction

Material properties 

Standard

Unit

CSB-EPB2D

General properties

Color

-

-

Green

Density 

ISO1183

g/cm3

1.40

Max. moisture absorption, 50%RH

ISO62

%

0.3

Max. water absorption

ISO62

%

1.2

Coefficient of sliding friction(steel)

ITS025

µ

0.05-0.25

Max. PV value

ITS026

N/mm2×m/s

0.25

Mechanical properties

Flexural modulus

ISO178

MPa

2000

Flexural strength

ISO178

MPa

65

Max. static load

ITS027

MPa

30

Max. dynamic load

ITS028

MPa

13

Shore hardness

ISO868

D

75

Physical and thermal properties

Long-term application temperature

ITS029

℃

+80

Short-term application temperature 

ITS029

℃

+120

Lowest application temperature

ITS029

℃

-40

Thermal conductivity

ISO22007

W/m/K

0.25

Coefficient of thermal expansion 

ISO11359

K-1×10-5

11

Flammability

UL94

Class

HB

Electrical properties 

Volume resistance

IEC60093

Ω·cm

>1013

Surface resistance 

IEC60093

Ω

>1012

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

EPB2D Plastic plain bearings
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Dimensions

▊ PV value

The max PV value of the CSB-EPB2D 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 EPB2D-1).

EPB2D_01-Plastic plain bearings PV value.jpg

▊ Load, speed and temperature

CSB-EPB2D allows the Max static load of 30Mpa, The max compressive deformation rate under the max load is listed in Graph EPB2D-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: 1.2m/s) results into higher temperature (Tmax: 80℃) which decreases the load capacity of the bearing. Please refer to the Graph EPB2D-3 for such variation. 

EPB2D_02-Plastic plain bearings load.jpgEPB2D_03-Plastic plain bearings load and tepmerature.jpg

▊ Friction factor, wear and shaft material

▊ Friction factor

Graph EPB2D-4 shows that the friction factor of CSB-EPB2D is initially increased along with the operation speed increasing when the loading is stable but when the speed reaches over 0.25m/s, it is decreased along with the operation speed increasing. Graph EPB2D-5 shows that the friction factor of CSB-EPB2D is decreasing along with the loading increasing when the operation speed is stable. Graph EPB2D-6 shows the friction factor of CSB-EPB2D is sensitive to the shaft roughness. The best shaft roughness for this material is Ra0.3~0.6.

CSB-EPB2D
Dry
Grease
Oil
Water
Friction coef. μ
0.05~0.25
0.09
0.04
0.04



EPB2D_04-Plastic plain bearings friction and speed.jpgEPB2D_05-Plastic plain bearings friction and load.jpgEPB2D_06-Plastic plain bearings friction and surface roughness of shaft.jpg

▊ Wearing and shaft material

Graph EPB2D-7 and Graph EPB2D-8 shows that the hardened chrome steel shaft is good for CSB-EPB2D bearings under lower loading and stainless steel shaft is better when the loading is over 1.0Mpa. Hardened steel shaft is recommended in rotation operation but hardened chrome steel shaft is recommended in oscillation operation.

EPB2D_07-Plastic plain bearings wear and shaft materials.jpgEPB2D_08-Plastic plain bearings wear and load.jpg

▊ Chemical resistance

CSB-EPB2D is good at chemical resistance against mild base, weak acidic medium and various kinds of lubricants.

▊ Water absorption

The moisture absorption of CSB-EPB2D plastic bearings is 0.3% in standard atmosphere. The max. water absorption is 1.2% in water. These values are so low that design changes due to absorption are only necessary in extreme applications.

EPB2D_09-Plastic plain bearings moisture absorption.jpg

▊ UV resistance

The color of CSB-EPB2D will become lighter when it is exposed into the UV ray. The hardness, Compressive strength and wear resistance of the material is also stable under such condition.

▊ Installation tolerances

CSB-EPB2D Tolerances after pressfit

Diameter [mm]
CSB-EPB2D 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-EPB2D Plastic Plain Bearings

Type PDF
Size 587KB
Time 09-2021
No. CSB/CAT.062E
download

1456

工程塑料轴承查找器

CSB-EPB®

CSB-EPB® Plain bearings finder V2.1

view tools

▊CSB-EPB® Plastic Bearings Finder[V2.1] 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.

自润滑半成品查询器

CSB-SFP®

CSB-SFP® Semi-finished Products Finder V2.0

view tools

▊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.

MediumEPB2D 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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