EPB19 Plastic plain bearings - CSB® Plastic Bearing Technology

Product properties

● Wear resistance material for temperature up to 150 ℃. The Features of the material is kept stable either at high or low temperature

● Continuous working temperature: -40℃/+150℃

● Applicable for oscillating under high load

● Maintenance-free dry operation

● High pressure resistance

Material properties	Standard	Unit	CSB-EPB19
General properties
Color	-	-	Dark grey
Density	ISO1183	g/cm³	1.27
Max. moisture absorption, 50%RH	ISO62	%	1.3
Max. water absorption	ISO62	%	4.5
Coefficient of sliding friction(steel)	ITS025	µ	0.05-0.20
Max. PV value	ITS026	N/mm²×m/s	0.60
Mechanical properties
Flexural modulus	ISO178	MPa	2800
Flexural strength	ISO178	MPa	80
Max. static load	ITS027	MPa	60
Max. dynamic load	ITS028	MPa	22
Shore hardness	ISO868	D	72
Physical and thermal properties
Long-term application temperature	ITS029	℃	+150
Short-term application temperature	ITS029	℃	+200
Lowest application temperature	ITS029	℃	-40
Thermal conductivity	ISO22007	W/m/K	0.25
Coefficient of thermal expansion	ISO11359	K^-1×10^-5	10
Flammability	UL94	Class	HB
Electrical properties
Volume resistance	IEC60093	Ω·cm	>10¹³
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

EPB19 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-EPB19 plastic bearings is 0.6N/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 EPB19-1).

EPB19_01-Plastic plain bearings PV value.jpg

▊ Load, speed and temperature

CSB-EPB19 allows the Max static load of 60Mpa, The max compressive deformation rate under the max load is listed in Graph EPB19-2, The actual load capacity of bearing is slightly less than 60Mpa, The bearing load is variable against the speed and temperature, Fast speed (Vmax: 1.5m/s) results into higher temperature (Tmax: 150℃) which decreases the load capacity of the bearing. Please refer to the Graph EPB19-3 for such variation.

EPB19_02-Plastic plain bearings load.jpg EPB19_03-Plastic plain bearings load and tepmerature.jpg

▊ Friction factor, wear and shaft material

▊ Friction factor

Graph EPB19-4 shows that the friction factor of CSB-EPB19 is not sensitive to the operation speed. Graph EPB19-5 tells that the friction factor of CSB-EPB19 is decreased along with the loading increasing and will be relatively stable when the loading reaches 20 Mpa upwards. Graph EPB19-6 shows that the friction factor of CSB-EPB19 is not sensitive to the shaft surface roughness. Therefore, it is recommended a proper shaft surface roughness in the range of Ra0.3~0.6.

CSB-EPB19	Dry	Grease	Oil	Water
Friction coef. μ	0.05~0.20	0.09	0.04	0.04

EPB19_04-Plastic plain bearings friction and speed.jpg EPB19_05-Plastic plain bearings friction and load.jpg EPB19_06-Plastic plain bearings friction and surface roughness of shaft.jpg

▊ Wearing and shaft material

Graph EPB19-7 shows CSB-EPB19 friction factor is variable against different shaft materials in rotation operation under loading of 2Mpa. Testing indicates that hardened shaft is best for rotation operation of CSB-EPB19. The operation condition is better when CSB-EPB19 is used against hardened steel shafts, high speed steel shaft and hardened chrome steel shaft under rotation operation. Graph EPB19-8x describes that hardened chrome steel is better for this material under high loading operation where as long as the increasing of the loading, the wearing of the bearing is relatively stable.

EPB19_07-Plastic plain bearings wear and shaft materials.jpg EPB19_08-Plastic plain bearings wear and load.jpg

▊ Chemical resistance

CSB-EPB19 is good at chemical resistance against mild base, weak acidic medium and various kinds of lubricants.

▊ Water absorption

The moisture absorption of CSB-EPB19 plastic plain bearings is 1.3% in standard atmosphere. The max. water absorption is 4.5% in water. The application environment has to be considered due to the high water absorbtion properties.

EPB19_09-Plastic plain bearings moisture absorption.jpg

▊ UV resistance

The color of CSB-EPB19 could be dimmed when it is exposed into the UV ray. The material performance stays stable.

▊ Installation tolerances

CSB-EPB19 bushing tolerances after pressfit

Diameter [mm]	Inner diameter 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

工程塑料轴承查找器 — CSB-EPB®

Plain Bearings Finder

view tools

▊CSB-EPB® Plastic Bearings 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 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®

Rods and plates Finder

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.

CSB-EPB19 Plastic Plain Bearings

Type PDF

Size 579KB

Time 09-2021

No. CSB/CAT.062E

download

974

Medium	EPB19 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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