Product Features

● The combination of middle to low load and low speed application requirement. It is a material without PTFE embedded for the low cost and big quantity demanding

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

● Very common; suitable for most average and low load

● Maintenance-free dry operation

● Light wear against different shaft materials

● Low friction

Material properties	Standard	Unit	CSB-EPB2D
General properties
Color	-	-	Green
Density	ISO1183	g/cm³	1.40
Max. moisture absorption, 50%RH	ISO62	%	0.3
Max. water absorption	ISO62	%	1.2
Coefficient of sliding friction(steel)	ITS025	µ	0.05-0.25
Max. PV value	ITS026	N/mm²×m/s	0.25
Mechanical properties
Flexural modulus	ISO178	MPa	2000
Flexural strength	ISO178	MPa	65
Max. static load	ITS027	MPa	30
Max. dynamic load	ITS028	MPa	13
Shore hardness	ISO868	D	75
Physical and thermal properties
Long-term application temperature	ITS029	℃	+80
Short-term application temperature	ITS029	℃	+120
Lowest application temperature	ITS029	℃	-40
Thermal conductivity	ISO22007	W/m/K	0.25
Coefficient of thermal expansion	ISO11359	K^-1×10^-5	11
Flammability	UL94	Class	HB
Electrical properties
Volume resistance	IEC60093	Ω·cm	>10¹³
Surface resistance	IEC60093	Ω	>10¹²

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

Sleeve bearing

Flange bearing

Thrust washer

EPB2D 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-EPB2D 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 EPB2D-1).

EPB2D_01-Plastic plain bearings PV value.jpg

▊ Load, speed and temperature

CSB-EPB2D allows the Max static load of 30Mpa, The max compressive deformation rate under the max load is listed in Graph EPB2D-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: 1.2m/s) results into higher temperature (Tmax: 80℃) which decreases the load capacity of the bearing. Please refer to the Graph EPB2D-3 for such variation.

EPB2D_02-Plastic plain bearings load.jpg EPB2D_03-Plastic plain bearings load and tepmerature.jpg

▊ Friction factor, wear and shaft material

▊ Friction factor

Graph EPB2D-4 shows that the friction factor of CSB-EPB2D is initially increased along with the operation speed increasing when the loading is stable but when the speed reaches over 0.25m/s, it is decreased along with the operation speed increasing. Graph EPB2D-5 shows that the friction factor of CSB-EPB2D is decreasing along with the loading increasing when the operation speed is stable. Graph EPB2D-6 shows the friction factor of CSB-EPB2D is sensitive to the shaft roughness. The best shaft roughness for this material is Ra0.3~0.6.

CSB-EPB2D	Dry	Grease	Oil	Water
Friction coef. μ	0.05~0.25	0.09	0.04	0.04

EPB2D_04-Plastic plain bearings friction and speed.jpg EPB2D_05-Plastic plain bearings friction and load.jpg EPB2D_06-Plastic plain bearings friction and surface roughness of shaft.jpg

▊ Wearing and shaft material

Graph EPB2D-7 and Graph EPB2D-8 shows that the hardened chrome steel shaft is good for CSB-EPB2D bearings under lower loading and stainless steel shaft is better when the loading is over 1.0Mpa. Hardened steel shaft is recommended in rotation operation but hardened chrome steel shaft is recommended in oscillation operation.

EPB2D_07-Plastic plain bearings wear and shaft materials.jpg EPB2D_08-Plastic plain bearings wear and load.jpg

▊ Chemical resistance

CSB-EPB2D is good at chemical resistance against mild base, weak acidic medium and various kinds of lubricants.

▊ Water absorption

The moisture absorption of CSB-EPB2D plastic bearings is 0.3% in standard atmosphere. The max. water absorption is 1.2% in water. These values are so low that design changes due to absorption are only necessary in extreme applications.

EPB2D_09-Plastic plain bearings moisture absorption.jpg

▊ UV resistance

The color of CSB-EPB2D will become lighter when it is exposed into the UV ray. The hardness, Compressive strength and wear resistance of the material is also stable under such condition.

▊ Installation tolerances

CSB-EPB2D Tolerances after pressfit

Diameter [mm]	CSB-EPB2D 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	EPB2D 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-EPB2D Plastic Plain Bearings 1990

Time 09-2021

Type PDF

No. CSB/CAT.062E

Size 587KB

1990

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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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