Product Features

● Optimized for middle load applications. It is suitable for low frequency motion and low cost requirement

● Continuous working temperature: -40℃/+100℃

● High load capacity

● Good economic ratio

● Dry operation and maintenance free

● Applicable for various shaft materials

Material properties	Standard	Unit	CSB-EPB3G
General properties
Color	-	-	Black
Density	ISO1183	g/cm³	1.37
Max. moisture absorption, 50%RH	ISO62	%	1.3
Max. water absorption	ISO62	%	5.5
Coefficient of sliding friction(steel)	ITS025	µ	0.05-0.15
Max. PV value	ITS026	N/mm²×m/s	0.30
Mechanical properties
Flexural modulus	ISO178	MPa	7700
Flexural strength	ISO178	MPa	190
Max. static load	ITS027	MPa	75
Max. dynamic load	ITS028	MPa	36
Shore hardness	ISO868	D	78
Physical and thermal properties
Long-term application temperature	ITS029	℃	+100
Short-term application temperature	ITS029	℃	+160
Lowest application temperature	ITS029	℃	-40
Thermal conductivity	ISO22007	W/m/K	0.24
Coefficient of thermal expansion	ISO11359	K^-1×10^-5	11
Flammability	UL94	Class	HB
Electrical properties
Volume resistance	IEC60093	Ω·cm	>10¹²
Surface resistance	IEC60093	Ω	>10¹¹

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

Sleeve bearing

Flange bearing

Thrust washer

EPB3G 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-EPB3G 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 EPB3G-1).

EPB3G_01-Plastic plain bearings PV value.jpg

▊ Load, speed and temperature

CSB-EPB3G allows the Max static load of 75Mpa, The max compressive deformation rate under the max load is listed in Graph EPB3G-2, The actual load capacity of bearing is slightly less than 75Mpa, The bearing load is variable against the speed and temperature, Fast speed (Vmax: 0.8m/s) results into higher temperature (Tmax: 100℃) which decreases the load capacity of the bearing. Please refer to the Graph EPB3G-3 for such variation.

EPB3G_02-Plastic plain bearings load.jpg EPB3G_03-Plastic plain bearings load and tepmerature.jpg

▊ Friction factor, wear and shaft material

▊ Friction factor

Graph EPB3G-4 and Graph EPB3G-5 show that the friction factor of CSB-EPB3G is variable along with the changing of the operation speed and bearing loading especially when the bearing loading is within 20Mpa. In the mean while the Graph EPB3G-6 shows that the friction factor of CSB-EPB3G is also affected by the shaft surface roughness. Too rough shaft surface or too fine shaft surface will increase the wearing and friction factor. The recommended shaft surface roughness is Ra0.1~0.3.

CSB-EPB3G	Dry	Grease	Oil	Water
Friction coef. μ	0.05~0.15	0.09	0.04	0.04

EPB3G_04-Plastic plain bearings friction and speed.jpg EPB3G_05-Plastic plain bearings friction and load.jpg EPB3G_06-Plastic plain bearings friction and surface roughness of shaft.jpg

▊ Wearing and shaft material

Graph EPB3G-7 and Graph EPB3G-8 show that the wearing of CSB-EPB3G is similar either against the normal shaft or hardened shaft. The most suitable shaft materials for CSB-EPB3G are hardened steel and hardened chrome steel. Graph EPB3G-7 shows that the wearing feature is better in oscillation operation than in rotation operation.

EPB3G_07-Plastic plain bearings wear and shaft materials.jpg EPB3G_08-Plastic plain bearings wear and load.jpg

▊ Chemical resistance

CSB-EPB3G is good at chemical resistance against weak acidic medium and various kinds of lubricants.

▊ Water absorption

The moisture absorption of CSB-EPB3G plastic plain bearings is 1.3% in standard atmosphere. The max. water absorption is 5.5% in water. The application environment has to be considered due to the high water absorbtion properties.

EPB3G_09-Plastic plain bearings moisture absorption.jpg

▊ UV resistance

CSB-EPB3G can maintain its color unchanged when it is exposed into the UV ray. The material performance stays stable.

▊ Installation tolerances

CSB-EPB3G Tolerances after pressfit

Diameter [mm]	CSB-EPB3G 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

Medium	EPB3G 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.

CSB-EPB3G Plastic Plain Bearings 1921

Time 09-2021

Type PDF

No. CSB/CAT.062E

Size 584KB

1921

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CSB-EPB®

Plain bearings finder v2.1

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CSB-EPB® Plain bearings finder V2.1

▊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.

Use Tools

CSB-SFP®

Semi-finished Products Finder V2.0

view tools

DURAPLAS® Semi-finished Products Finder V2.0

▊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.

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