Plastic Bearings

EPB5A Plastic Plain Bearings

EPB5A Plastic Plain Bearings Continuous working temperature: -100?~250?; Suitable for high load and lovo speed operation; High load capacity at higher temperature; Good chemical resistance; FDA grade. The Material Data Sheet PV Value of Bearings The max PV value of the CSB-EPB5A series bearing...

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EPB5A Plastic Plain Bearings

Continuous working temperature: -100?~250?;

Suitable for high load and lovo speed operation;

High load capacity at higher temperature;

Good chemical resistance;

FDA grade.

The Material Data Sheet

Typical Item	Standard	Unit	CSB-EPB5A
Density	ISO1183	g/cm³	1.50
Color			Grey
Dynamic friction /steel(dry)			0.10-0.25
Max. PV (dry)		N/mm²×m/s	0.9
Max. roatating velocity		m/s	0.6
Max. oscillating velocity		m/s	0.4
Max. linear velocity		m/s	1.0
Tensile strength	ISO527	MPa	150
Compressive strength (Axial)		MPa	100
E-module	ISO527	MPa	7900
Max. static pressure of the surface, 20?		MPa	120
Shore hardness	ISO868	D	83
Continuous work temperature		?	-100/250
Short-time work temperature		?	-100/315
Thermal conductivity	ASTME1461	W/m×k	0.6
Linear coef. of thermal expansion	ASTMD696	K-1×10-5	6
Moisture absorption RH50/23?	ASTMD570	%	0.1
Max. water absorption, 23?		%	0.5
Flammability	UL94		V0
Volume resistivity	IEC60093	Ocm	>1015
Surface resistivity	IEC60093	O	>1015

PV Value of Bearings

The max PV value of the CSB-EPB5A series bearing is 0.9N/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).

The Relation of Load, Speed and Temperature

CSB-EPB5A allows the Max static load of 120Mpa, 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 120Mpa, 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.

The Friction Factor,Wearing 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 CSBEP5A 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	0.09~0.25	0.09	0.04	0.04

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. Specially, from the Graph EPB5A-8, it is read that CSB-EPB5A is with better performance under high temperature around 150Comparing with under the ambient temperature of 23?.

Chemical Resistance

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

Water Absorbability

The water absorb rate of CSB-EPB5A is less than 0.1% under the atmospheric pressure while it is 0.5% when the material is immerged into water. The material performance and dimensions of the material is stabilized for the applications under humid environment.

UV Resistance

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

Bearing Installation

CSB-EPB5A The Interfit Tolerance

Diameter mm	Tolerance after fit E10	Fit Housing H7	Fit Shaft h9
>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

CSB Plastic is one of the leading China epb5a plastic plain bearings manufacturers and suppliers, and also a professional epb5a plastic plain bearings factory and company, we are always at your services.

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