EPB5Z Plastic plain bearings - CSB® Plastic Bearing Technology

Product properties

● It is a high load material with excellent low friction factor. Marginal load application is acceptable and it is with good wear resistance both for hard and soft shafts

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

● High load capacity

● Higher speed is permissible

● Marginal pressure is permissible

● Best performance for oscillating movement

Material properties	Standard	Unit	CSB-EPB5Z
General properties
Color	-	-	Brown
Density	ISO1183	g/cm³	1.40
Max. moisture absorption, 50%RH	ISO62	%	0.3
Max. water absorption	ISO62	%	1.1
Coefficient of sliding friction(steel)	ITS025	µ	0.05-0.15
Max. PV value	ITS026	N/mm²×m/s	1.00
Mechanical properties
Flexural modulus	ISO178	MPa	4200
Flexural strength	ISO178	MPa	150
Max. static load	ITS027	MPa	100
Max. dynamic load	ITS028	MPa	51
Shore hardness	ISO868	D	80
Physical and thermal properties
Long-term application temperature	ITS029	℃	+250
Short-term application temperature	ITS029	℃	+310
Lowest application temperature	ITS029	℃	-100
Thermal conductivity	ISO22007	W/m/K	0.55
Coefficient of thermal expansion	ISO11359	K^-1×10^-5	5
Flammability	UL94	Class	V0
Electrical properties
Volume resistance	IEC60093	Ω·cm	>10¹¹
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

EPB5Z 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-EPB5Z plastic bearings is 1.0N/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 EPB5Z-1).

EPB5Z_01-Plastic plain bearings PV value.jpg

▊ Load, speed and temperature

CSB-EPB5Z allows the Max static load of 100Mpa, The max compressive deformation rate under the max load is listed in Graph EPB5Z-2, The actual load capacity of bearing is slightly less than 100Mpa, The bearing load is variable against the speed and temperature, Fast speed (Vmax: 1.5m/s) results into higher temperature (Tmax: 250℃) which decreases the load capacity of the bearing. Please refer to the Graph EPB5Z-3 for such variation.

EPB5Z_02-Plastic plain bearings load.jpg EPB5Z_03-Plastic plain bearings load and tepmerature.jpg

▊ Friction factor, wear and shaft material

▊ Friction factor

Graph EPB5Z-4 shows that the friction factor of CSB-EPB5Z is initially increased along with the operation speed increasing when the loading is stable but when the speed reaches over 0.2m/s, it is decreased along with the operation speed increasing. Graph EPB5Z-5 shows that the friction factor of CSB-EPB5Z is decreasing along with the loading increasing when the operation speed is stable. The best shaft roughness for this material is Ra0.4~0.7.

CSB-EPB5Z	Dry	Grease	Oil	Water
Friction coef. μ	0.05~0.15	0.09	0.04	0.04

EPB5Z_04-Plastic plain bearings friction and speed.jpg EPB5Z_05-Plastic plain bearings friction and load.jpg EPB5Z_06-Plastic plain bearings friction and surface roughness of shaft.jpg

▊ Wearing and shaft material

Graph EPB5Z-7 and Graph EPB5Z-8 shows that the wearing speed of CSB-EPB5Z is similar with most of the other materials under lower loading but it will be much better when the loading is higher. It also tells that the hardened steel shaft is good for CSB-EPB5Z bearings.Graph EPB5Z-7 shows the wearing rate is less in oscillation operation than in rotation operation especially when the loading is over 20Mpa. Heat-treated steel shaft is recommended in rotation operation and stainless steel and hardened chrome steel shaft is recommended in oscillation operation.

EPB5Z_07-Plastic plain bearings wear and shaft materials.jpg EPB5Z_08-Plastic plain bearings wear and load.jpg

▊ Chemical resistance

CSB-EPB5Z is good at chemical resistance against mild base, weak acidic medium and various kinds of lubricants.

▊ Water absorption

The moisture absorption of CSB-EPB5Z plastic bearings is 0.3% in standard atmosphere. The max. water absorption is 1.1% in water. These values are so low that design changes due to absorption are only necessary in extreme applications.

EPB5Z_09-Plastic plain bearings moisture absorption.jpg

▊ UV resistance

The material performance of CSB-EP5Z will be lowered if it is exposed in the UV ray for long period.

▊ Installation tolerances

CSB-EPB5Z Tolerances after pressfit

Diameter [mm]	CSB-EPB5Z 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-EPB5Z Plastic Plain Bearings

Type PDF

Size 590KB

Time 09-2021

No. CSB/CAT.062E

download

1691

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	EPB5Z 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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