EPB4 Plastic plain bearings - CSB® Plastic Bearing Technology

Product properties

● High temperature material with good chemical resistance feature. It could be continously used under the temperature of 200 ℃, it is also suitable to be used in the humid environment and even inside the chemical liquids. It is best to be used against hard materials

● Continuous working temperature: -40℃/+200℃

Suitable for medium and high load operation

● Maintenance-free dry operation

● Good chemical resistance

● Suitable for humid environment

Material properties	Standard	Unit	CSB-EPB4
General properties
Color	-	-	Black
Density	ISO1183	g/cm³	1.70
Max. moisture absorption, 50%RH	ISO62	%	0.1
Max. water absorption	ISO62	%	0.3
Coefficient of sliding friction(steel)	ITS025	µ	0.07-0.20
Max. PV value	ITS026	N/mm²×m/s	1.35
Mechanical properties
Flexural modulus	ISO178	MPa	12000
Flexural strength	ISO178	MPa	165
Max. static load	ITS027	MPa	90
Max. dynamic load	ITS028	MPa	50
Shore hardness	ISO868	D	82
Physical and thermal properties
Long-term application temperature	ITS029	℃	+200
Short-term application temperature	ITS029	℃	+240
Lowest application temperature	ITS029	℃	-40
Thermal conductivity	ISO22007	W/m/K	0.60
Coefficient of thermal expansion	ISO11359	K^-1×10^-5	4
Flammability	UL94	Class	V0
Electrical properties
Volume resistance	IEC60093	Ω·cm	>10⁵
Surface resistance	IEC60093	Ω	>10⁵

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

Standard products

Sleeve bearing

Flange bearing

Thrust washer

EPB4 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-EPB4 plastic bearings is 1.35N/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 EPB4-1).

EPB4_01-Plastic plain bearings PV value.jpg

▊ Load, speed and temperature

CSB-EPB4 allows the Max static load of 90Mpa, The max compressive deformation rate under the max load is listed in Graph EPB4-2, The actual load capacity of bearing is slightly less than 90Mpa, The bearing load is variable against the speed and temperature, Fast speed (Vmax: 1.0m/s) results into higher temperature (Tmax: 200℃) which decreases the load capacity of the bearing. Please refer to the Graph EPB4-3 for such variation.

EPB4_02-Plastic plain bearings load.jpg EPB4_03-Plastic plain bearings load and tepmerature.jpg

▊ Friction factor, wear and shaft material

▊ Friction factor

Friction factor will be slightly decreased along with the speed increasing under certain loading of the rotation operation (see Graph EPB4-4) and it will be slightly decreased along with the loading increasing under certain speed of the rotation operation especially when the loading is less than 30Mpa. Graph EPB4-5 tells that the friction of the CSB-EPB4 is not changed at all when the shaft roughness is between Ra0.1 to Ra0.4 and will be considerably increased when the shaft roughness is over Ra0.4. So the recommended shaft roughness is Ra0.1-Ra0.4.

CSB-EPB4	Dry	Grease	Oil	Water
Friction coef. μ	0.07~0.20	0.09	0.04	0.04

EPB4_04-Plastic plain bearings friction and speed.jpg EPB4_05-Plastic plain bearings friction and load.jpg EPB4_06-Plastic plain bearings friction and surface roughness of shaft.jpg

▊ Wearing and shaft material

Graph EPB4-7 shows that CSB-EPB4 is suitable for most of the shaft materials under low loading rotation operation and it is good for hardened carbon steel shaft under high loading rotation operation (see Graph EPB4- 8). CSB-EPB4 is suitable for stainless steel shaft under oscillation operation and good for hot rolled carbon steel and hardened carbon steel shaft under rotation operation.

EPB4_07-Plastic plain bearings wear and shaft materials.jpg EPB4_08-Plastic plain bearings wear and load.jpg

▊ Chemical resistance

The Chemical Resistance of CSB-EPB4 is fairly good against most of Acid and Alkalis.

▊ Water absorption

The moisture absorption of CSB-EPB4 plastic plain bearings is 0.1% in standard atmosphere. The max. water absorption is 0.3% in water . These values are very low, CSB-EPB4 plastic palin bearings is very well suited for used in wet applications.

EPB4_09-Plastic plain bearings moisture absorption.jpg

▊ UV resistance

Disintegration could be possible for the material CSB-EPB4 after long period of exposing under the UV ray and therefore the compressive strength will be reduced.

▊ Installation tolerances

CSB-EPB4 Tolerances after pressfit

Diameter [mm]	CSB-EPB4 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-EPB4 Plastic Plain Bearings

Type PDF

Size 585KB

Time 09-2021

No. CSB/CAT.062E

download

1533

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®

DURAPLAS® Semi-finished Products Finder V2.0

view tools

▊DURAPLAS® 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.
▊DURAPLAS® 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	EPB4 bearings resistance
Alcohol	Resistant
Hydrocarbons	Resistant
Greases. oils	Resistant
Fuels	Resistant
Diluted acids	Conditionally resistant
Strong acids	Conditionally resistant
Diluted alkalis	Resistant
Strong alkalis	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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