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CSB塑料轴承产品05
CSB塑料轴承产品04
EPB5Z Plastic plain bearings

Product properties

● It is a high load material with excellent low friction factor. Marginal load application is acceptable and it is with good wear resistance both for hard and soft shafts 

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

● High load capacity

● Higher speed is permissible

● Marginal pressure is permissible

● Best performance for oscillating movement


Material properties 

Standard

Unit

CSB-EPB5Z

General properties

Color

-

-

Brown

Density 

ISO1183

g/cm3

1.40

Max. moisture absorption, 50%RH

ISO62

%

0.3

Max. water absorption

ISO62

%

1.1

Coefficient of sliding friction(steel)

ITS025

µ

0.05-0.15

Max. PV value

ITS026

N/mm2×m/s

1.00

Mechanical properties

Flexural modulus

ISO178

MPa

4200

Flexural strength

ISO178

MPa

150

Max. static load

ITS027

MPa

100

Max. dynamic load

ITS028

MPa

51

Shore hardness

ISO868

D

80

Physical and thermal properties

Long-term application temperature

ITS029

+250

Short-term application temperature 

ITS029

+310

Lowest application temperature

ITS029

-100

Thermal conductivity

ISO22007

W/m/K

0.55

Coefficient of thermal expansion 

ISO11359

K-1×10-5

5

Flammability

UL94

Class

V0

Electrical properties 

Volume resistance

IEC60093

Ω·cm

>1011

Surface resistance 

IEC60093

Ω

>1011

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

EPB5Z Plastic plain bearings
Dimensions

 PV value

The max PV value of the CSB-EPB5Z plastic bearings is 1.0N/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 EPB5Z-1).

EPB5Z_01-Plastic plain bearings PV value.jpg

▊ Load, speed and temperature

CSB-EPB5Z allows the Max static load of 100Mpa, The max compressive deformation rate under the max load is listed in Graph EPB5Z-2, The actual load capacity of bearing is slightly less than 100Mpa, The bearing load is variable against the speed and temperature, Fast speed (Vmax: 1.5m/s) results into higher temperature (Tmax: 250℃) which decreases the load capacity of the bearing. Please refer to the Graph EPB5Z-3 for such variation. 

EPB5Z_02-Plastic plain bearings load.jpgEPB5Z_03-Plastic plain bearings load and tepmerature.jpg

▊ Friction factor, wear and shaft material

 Friction factor 

Graph EPB5Z-4 shows that the friction factor of CSB-EPB5Z is initially increased along with the operation speed increasing when the loading is stable but when the speed reaches over 0.2m/s, it is decreased along with the operation speed increasing. Graph EPB5Z-5 shows that the friction factor of CSB-EPB5Z is decreasing along with the loading increasing when the operation speed is stable. The best shaft roughness for this material is Ra0.4~0.7.

CSB-EPB5Z
Dry
Grease
Oil
Water
Friction coef. μ
0.05~0.15
0.09
0.04
0.04



EPB5Z_04-Plastic plain bearings friction and speed.jpgEPB5Z_05-Plastic plain bearings friction and load.jpgEPB5Z_06-Plastic plain bearings friction and surface roughness of shaft.jpg

 Wearing and shaft material

Graph EPB5Z-7 and Graph EPB5Z-8 shows that the wearing speed of CSB-EPB5Z is similar with most of the other materials under lower loading but it will be much better when the loading is higher. It also tells that the hardened steel shaft is good for CSB-EPB5Z bearings.Graph EPB5Z-7 shows the wearing rate is less in oscillation operation than in rotation operation especially when the loading is over 20Mpa. Heat-treated steel shaft is recommended in rotation operation and stainless steel and hardened chrome steel shaft is recommended in oscillation operation.

EPB5Z_07-Plastic plain bearings wear and shaft materials.jpgEPB5Z_08-Plastic plain bearings wear and load.jpg

 Chemical resistance

CSB-EPB5Z is good at chemical resistance against mild base, weak acidic medium and various kinds of lubricants.

 Water absorption

The moisture absorption of CSB-EPB5Z plastic bearings is 0.3% in standard atmosphere. The max. water absorption is 1.1% in water. These values are so low that design changes due to absorption are only necessary in extreme applications.

EPB5Z_09-Plastic plain bearings moisture absorption.jpg

 UV resistance

The material performance of CSB-EP5Z will be lowered if it is exposed in the UV ray for long period.

▊ Installation tolerances

CSB-EPB5Z bushing tolerances after pressfit

Diameter [mm]
Inner diameter 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-EPB5Z Plastic Plain Bearings

Type PDF
Size 590KB
Time 09-2021
No. CSB/CAT.062E
download

1186

MediumEPB5Z 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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