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  5. EPBH Plastic plain bearings
EPBH Plastic plain bearings

Product properties

● This material is developed against the requirement of wear resistance and economic cost for cost effective and big quantity comsuming applications 

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

● Suitable for most of average and low load

● Maintenance-free dry operation

● Low cost for high quantities

Material properties 

Standard

Unit

CSB-EPBH

General properties

Color

-

-

Black

Density 

ISO1183

g/cm3

1.43

Max. moisture absorption, 50%RH

ISO62

%

0.3

Max. water absorption

ISO62

%

1.2

Coefficient of sliding friction(steel)

ITS025

µ

0.05-0.20

Max. PV value

ITS026

N/mm2×m/s

0.30

Mechanical properties

Flexural modulus

ISO178

MPa

2000

Flexural strength

ISO178

MPa

60

Max. static load

ITS027

MPa

30

Max. dynamic load

ITS028

MPa

12

Shore hardness

ISO868

D

74

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

0.20

Coefficient of thermal expansion 

ISO11359

K-1×10-5

10

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.

EPBH Plastic plain bearings
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Dimensions

▊ PV value

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

EPBH_01-Plastic plain bearings PV value.jpg

▊ Load, speed and temperature

CSB-EPBH allows the Max static load of 30Mpa, The max compressive deformation rate under the max load is listed in Graph EPBH-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 EPBH-3  for such variation. 

EPBH_02-Plastic plain bearings load.jpgEPBH_03-Plastic plain bearings load and tepmerature.jpg

▊ Friction factor, wear and shaft material

▊ Friction factor 

CSB-EPBH friction factor is not sensitive to the operation speed and bearing loading (see Graph EPBH-4 and Graph EPBH-5). The above features are the most common considerations for the bearing material selection. The friction of CSB-EPBH could be maintained at a relatively lower level so that the good wearing features are guaranteed. From the Graph EPBH-6, we could see that the friction factor is variable against the changing of shaft roughness. The recommended shaft roughness is Ra0.3~0.5. 

CSB-EPBH
Dry
Grease
Oil
Water
Friction coef. μ
0.05~0.20
0.09
0.04
0.04



EPBH_04-Plastic plain bearings friction and speed.jpgEPBH_05-Plastic plain bearings friction and load.jpgEPBH_06-Plastic plain bearings friction and surface roughness of shaft.jpg

▊ Wearing and shaft material

The shaft material is an important media for the bearing wearing but CSB-EPBH is suitable for almost all kinds of shaft materials. Graph EPBH-7 and Graph EPBH-8 show that the wearing feature of CSB-EPBH is excellent when the shaft material are hardened chrome steel or hardened steel. 

EPBH_07-Plastic plain bearings wear and shaft materials.jpgEPBH_08-Plastic plain bearings wear and load.jpg

▊ Chemical resistance

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

▊ Water absorption

The moisture absorption of CSB-EPBH 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.

EPBH_09-Plastic plain bearings moisture absorption.jpg

▊ UV resistance

CSB-EPBH can maintain its color unchanged 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-EPBH Tolerances after pressfit

Diameter [mm]
CSB-EPBH 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


工程塑料轴承查找器

CSB-EPB®

Plain Bearings Finder

view tools

▊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.

自润滑半成品查询器

CSB-SFP®

Rods and plates Finder

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.

CSB-EPBH Plastic Plain Bearings

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

974

MediumEPBH 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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