EPB5A Plastic plain bearings - CSB® Plastic Bearing Technology

Product properties

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

● Suitable for high load and lovo speed operation

● High load capacity at higher temperature

● Good chemical resistance

● FDA grade

Material properties	Standard	Unit	CSB-EPB5A
General properties
Color	-	-	Beige
Density	ISO1183	g/cm³	1.28
Max. moisture absorption, 50%RH	ISO62	%	0.3
Max. water absorption	ISO62	%	0.5
Coefficient of sliding friction(steel)	ITS025	µ	0.25-0.40
Max. PV value	ITS026	N/mm²×m/s	0.25
Mechanical properties
Flexural modulus	ISO178	MPa	3600
Flexural strength	ISO178	MPa	140
Max. static load	ITS027	MPa	90
Max. dynamic load	ITS028	MPa	46
Shore hardness	ISO868	D	80
Physical and thermal properties
Long-term application temperature	ITS029	℃	+250
Short-term application temperature	ITS029	℃	+300
Lowest application temperature	ITS029	℃	-100
Thermal conductivity	ISO22007	W/m/K	0.24
Coefficient of thermal expansion	ISO11359	K^-1×10^-5	9
Flammability	UL94	Class	V0
Electrical properties
Volume resistance	IEC60093	Ω·cm	>10¹⁴
Surface resistance	IEC60093	Ω	>10¹³

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

Standard products

Sleeve bearing

Flange bearing

Thrust washer

EPB5A 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-EPB5A plastic bearings is 0.25N/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 EPB5A-1).

EPB5A_01-Plastic plain bearings PV value.jpg

▊ Load, speed and temperature

CSB-EPB5A allows the Max static load of 90Mpa, The max compressive deformation rate under the max load is listed in Graph EPB5A-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: 0.6m/s) results into higher temperature (Tmax: 250℃) which decreases the load capacity of the bearing. Please refer to the Graph EPB5A-3 for such variation.

EPB5A_02-Plastic plain bearings load.jpg EPB5A_03-Plastic plain bearings load and tepmerature.jpg

▊ Friction factor, wear and shaft material

▊ Friction factor

CSB-EPB5A Bearing Friction factor is increased along with the increasing of the operation speed under certain loading (See Graph EPB5A-4). The friction factor of CSB-EP5A is decreased along with the loading increasing not over 20Mpa (see Graph EPB5A-5). The friction factor will not change much along with the speed when the loading is over 20Mpa. The Graph EPB5A-6 shows that the bearing could achieve its best performance when the counter shaft surface roughness is around Ra0.4 to Ra0.9.

CSB-EPB5A	Dry	Grease	Oil	Water
Friction coef. μ	0.25~0.40	0.09	0.04	0.04

EPB5A_04-Plastic plain bearings friction and speed.jpg EPB5A_05-Plastic plain bearings friction and load.jpg EPB5A_06-Plastic plain bearings friction and surface roughness of shaft.jpg

▊ Wearing and shaft material

Graph EPB5A-7 and Graph EPB5A-8 show the test results of the material CSB-EPB5A running against different shaft materials. It is suitable for hard Aluminum and hard chrome steel shaft. The hard chrome steel shaft will be better when the loading is getting heavier. Graph EPB5A-7 shows CSB-EPB5A is good for oscillation operation.

EPB5A_07-Plastic plain bearings wear and shaft materials.jpg EPB5A_08-Plastic plain bearings wear and load.jpg

▊ Chemical resistance

Chemical Resistance of CSB-EPB5A is very good. It can work well in the heavy acid of 65%.

▊ Water absorption

The moisture absorption of CSB-EPB5A plastic plain bearings is 0.3% in standard atmosphere. The max. water absorption is 0.5% in water . These values are very low, CSB-EPB5A plastic palin bearings is very well suited for used in wet applications.

EPB5A_09-Plastic plain bearings moisture absorption.jpg

▊ UV resistance

CSB-EPB5A can maintain its performance to be stable even exposed in the UV ray for long period.

▊ Installation tolerances

CSB-EPB5A Tolerances after pressfit

Diameter [mm]	CSB-EPB5A 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-EPB5A Plastic Plain Bearings

Type PDF

Size 581KB

Time 09-2021

No. CSB/CAT.062E

download

1466

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	EPB5A bearings resistance
Alcohol	Resistant
Hydrocarbons	Resistant
Greases. oils	Resistant
Fuels	Resistant
Diluted acids	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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