EPB3M Plastic plain bearings - CSB® Plastic Bearing Technology

Product properties

● An excellent self-lubricated material suitable for impact resistance applications which is widedly used under the evironment of impact absorbing and weare resistance requirement

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

● High load capacity, Impact resistance

● Low cost

● Dry operation and maintenance free

● Good for Marginal Load

● Suitable for low speed operation

Material properties	Standard	Unit	CSB-EPB3M
General properties
Color	-	-	Dark grey
Density	ISO1183	g/cm³	1.14
Max. moisture absorption, 50%RH	ISO62	%	1.4
Max. water absorption	ISO62	%	7.6
Coefficient of sliding friction(steel)	ITS025	µ	0.09-0.30
Max. PV value	ITS026	N/mm²×m/s	0.15
Mechanical properties
Flexural modulus	ISO178	MPa	2700
Flexural strength	ISO178	MPa	100
Max. static load	ITS027	MPa	30
Max. dynamic load	ITS028	MPa	15
Shore hardness	ISO868	D	79
Physical and thermal properties
Long-term application temperature	ITS029	℃	+80
Short-term application temperature	ITS029	℃	+170
Lowest application temperature	ITS029	℃	-40
Thermal conductivity	ISO22007	W/m/K	0.24
Coefficient of thermal expansion	ISO11359	K^-1×10^-5	10
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.

Standard products

Sleeve bearing

Flange bearing

Thrust washer

EPB3M 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-EPB3M plastic bearings is 0.15N/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 EPB3M-1).

EPB3M_01-Plastic plain bearings PV value.jpg

▊ Load, speed and temperature

CSB-EPB3M allows the Max static load of 30Mpa, The max compressive deformation rate under the max load is listed in Graph EPB3M-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 EPB3M-3 for such variation.

EPB3M_02-Plastic plain bearings load.jpg EPB3M_03-Plastic plain bearings load and tepmerature.jpg

▊ Friction factor, wear and shaft material

▊ Friction factor

CSB-EPB3M Bearing Friction factor is increased along with the increasing of the operation speed (See Graph EPB3M-4) therefore it is suitable for the application under low speed operation. The friction factor of CSB-EP3M is decreased along with the loading increasing (see Graph EPB3M-5). The friction factor and wearing of the bearing is considerably affected by the counter shaft roughness. The Graph EPB3M-6 shows that the bearing could achieve its best performance when the counter shaft surface roughness is around Ra0.6.

CSB-EPB3M	Dry	Grease	Oil	Water
Friction coef. μ	0.09~0.30	0.09	0.04	0.04

EPB3M_04-Plastic plain bearings friction and speed.jpg EPB3M_05-Plastic plain bearings friction and load.jpg EPB3M_06-Plastic plain bearings friction and surface roughness of shaft.jpg

▊ Wearing and shaft material

Test of the bearing against various shaft materials shows that the material CSB-EPB3M features the wearing performance of the material is not sensitive with different materials where the loading is over 2Mpa. (See Graph EPB3M-7). The bearing performance remains the best when the loading is in the lower range. When the loading is increased, the wearing will be sharply increased. From the Graph EPB3M-8, the CSB-EPB3M material is better for the application with the counter shaft material of hard chrome steel. Graph EPB3M-7 shows that the material is better for rotation operation than oscillation operation.

EPB3M_07-Plastic plain bearings wear and shaft materials.jpg EPB3M_08-Plastic plain bearings wear and load.jpg

▊ Chemical resistance

CSB-EPB3M is good at chemical resistance against weak acidic medium and various kinds of lubricants.

▊ Water absorption

The moisture absorption of CSB-EPB3M plastic plain bearings is 1.4% in standard atmosphere. The max. water absorption is 7.6% in water. The application environment has to be considered due to the high water absorbtion properties.

EPB3M_09-Plastic plain bearings moisture absorption.jpg

▊ UV resistance

CSB-EPB3M can maintain its color unchanged when it is exposed into the UV ray. The material performance stays stable.

▊ Installation tolerances

CSB-EPB3M Tolerances after pressfit

Diameter [mm]	CSB-EPB3M D11 [mm]	Housing H7 [mm]	Shaft h9 [mm]
>0～3	+0.020～+0.080	0～+0.010	0～-0.025
>3～6	+0.030～+0.105	0～+0.012	0～-0.030
>6～10	+0.040～+0.130	0～+0.015	0～-0.036
>10～18	+0.050～+0.160	0～+0.018	0～-0.043
>18～30	+0.065～+0.195	0～+0.021	0～-0.052
>30～50	+0.080～+0.240	0～+0.025	0～-0.062
>50～80	+0.100～+0.290	0～+0.030	0～-0.074
>80～120	+0.120～+0.340	0～+0.035	0～-0.087
>120～180	+0.145～+0.395	0～+0.040	0～-0.100

CSB-EPB3M Plastic Plain Bearings

Type PDF

Size 592KB

Time 09-2021

No. CSB/CAT.062E

download

1495

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	EPB3M 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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