EPB9 Plastic plain bearings - CSB® Plastic Bearing Technology

Product properties

● Self-lubricated material with good elctricity conductivity. Mainly used with the high load and electricity conductive evironment

● Continuous working temperature: -40℃/+140℃

● Specially use for static electricity existing environment

● Suitable for low speed operation

● Higher load capacity

Material properties	Standard	Unit	CSB-EPB9
General properties
Color	-	-	Black
Density	ISO1183	g/cm³	1.28
Max. moisture absorption, 50%RH	ISO62	%	1.3
Max. water absorption	ISO62	%	6.5
Coefficient of sliding friction(steel)	ITS025	µ	0.10-0.40
Max. PV value	ITS026	N/mm²×m/s	0.35
Mechanical properties
Flexural modulus	ISO178	MPa	10000
Flexural strength	ISO178	MPa	250
Max. static load	ITS027	MPa	105
Max. dynamic load	ITS028	MPa	58
Shore hardness	ISO868	D	82
Physical and thermal properties
Long-term application temperature	ITS029	℃	+140
Short-term application temperature	ITS029	℃	+180
Lowest application temperature	ITS029	℃	-40
Thermal conductivity	ISO22007	W/m/K	0.60
Coefficient of thermal expansion	ISO11359	K^-1×10^-5	11
Flammability	UL94	Class	HB
Electrical properties
Volume resistance	IEC60093	Ω·cm	<10⁶
Surface resistance	IEC60093	Ω	<10⁶

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

Standard products

Sleeve bearing

Flange bearing

Thrust washer

EPB9 Plastic plain bearings

Part no.:

d1 [mm]：

d2 [mm]：

L_h13 [mm]：

d3_d13 [mm]：

T [mm]：

d1-max. [mm]：

d1-min. [mm]：

d2-max. [mm]：

d2-min. [mm]：

T max. tolerance [mm]：

T min. tolerance [mm]：

Max. shaft [mm]：

Min. shaft [mm]：

Max. housing [mm]：

Min. housing [mm]：

*Lead time [wsk]：

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Dimensions

▊ PV value

The max PV value of the CSB-EPB9 plastic bearings is 0.35N/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 EPB9-1).

EPB9_01-Plastic plain bearings PV value.jpg

▊ Load, speed and temperature

CSB-EPB9 allows the Max static load of 105Mpa, The max compressive deformation rate under the max load is listed in Graph EPB9-2, The actual load capacity of bearing is slightly less than 105Mpa, The bearing load is variable against the speed and temperature, Fast speed (Vmax: 0.8m/s) results into higher temperature (Tmax: 140℃) which decreases the load capacity of the bearing. Please refer to the Graph EPB9-3 for such variation.

EPB9_02-Plastic plain bearings load.jpg EPB9_03-Plastic plain bearings load and tepmerature.jpg

▊ Friction factor, wear and shaft material

▊ Friction factor

Graph EPB9-4 shows that the friction factor of CSB-EPB9 is much higher than those of other materials because the electronic conductive fiber is embedded into the bearing material. It is induced that the friction performance will be better when the bearing is lubricated. Graph EPB9-5 shows that the friction factory is decreasing along with the loading increasing and Graph EPB9-6 shows that the friction factor is increasing along with the shaft roughness increasing when the shaft roughness is between Ra0.1 to Ra0.5. This effecting will be less when the shaft roughness is between Ra0.5 to Ra1.6.

CSB-EPB9	Dry	Grease	Oil	Water
Friction coef. μ	0.10~0.40	0.09	0.04	0.04

EPB9_04-Plastic plain bearings friction and speed.jpg EPB9_05-Plastic plain bearings friction and load.jpg EPB9_06-Plastic plain bearings friction and surface roughness of shaft.jpg

▊ Wearing and shaft material

Graph EPB9-7 and EPB9-8 shows the different results of the material against different shaft materials. It induces that the bearing material is good for hard chrome steel shaft under low loading operation condition and good for hardened carbon steel shaft under high loading rotation operation.

EPB9_07-Plastic plain bearings wear and shaft materials.jpg EPB9_08-Plastic plain bearings wear and load.jpg

▊ Chemical resistance

CSB-EPB9 is good at chemical resistance against weak acidic medium and various kinds of lubricants.

▊ Water absorption

The moisture absorption of CSB-EPB9 plastic plain bearings is 1.3% in standard atmosphere. The max. water absorption is 6.5% in water. The application environment has to be considered due to the high water absorbtion properties.

EPB9_09-Plastic plain bearings moisture absorption.jpg

▊ UV resistance

When CSB-EPB9 is exposed into the UV ray, the material performance stays stable.

▊ Installation tolerances

CSB-EPB9 Tolerances after pressfit

Diameter [mm]	CSB-EPB9 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-EPB9 Plastic Plain Bearings

Type PDF

Size 582KB

Time 09-2021

No. CSB/CAT.062E

download

1621

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.

Medium	EPB9 bearings resistance
Alcohol	Resistant
Hydrocarbons	Resistant
Greases. oils	Resistant
Fuels	Resistant
Diluted acids	Conditionally resistant
Strong acids	Not resistant
Diluted alkalis	Resistant
Strong alkalis	Conditionally 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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