EPB Plastic Plain Bearings

EPB Plastic Plain Bearings
Product Details

EPB Plastic Plain Bearings

The most common CSB plastic bearing material. It is suitbale for the applications with working temperature not higher than 80?. It is the prefereable material with good wear resistance and economic efficient for a new designation.

Continuous working temperature: -40?~80?;

Very common; suitable for most of average and low load;

Maintenance-free dry operation;

Light wear against different shaft materials;

Low friction.

The Material Data Sheet


Typical Item

Standard

Unit

CSB-EPB

   Density

ISO1183

g/cm³

1.46

   Color



Dark Grey

   Dynamic friction /steel(dry)



0.05-.015

   Max. PV (dry)


N/mm²×m/s

0.4

   Max. roatating velocity


m/s

1.0

   Max. oscillating velocity


m/s

0.7

   Max. linear velocity


m/s

3.0

   Tensile strength

ISO527

MPa

80

   Compressive strength (Axial)


MPa

65

   E-module

ISO527

MPa

2300

   Max. static pressure of the surface, 20?


MPa

35

   Shore hardness

ISO868

D

75

   Continuous work temperature


-40/80

   Short-time work temperature


-40/120

   Thermal conductivity

ASTME1461

W/m×k

0.2

   Linear coef. of thermal expansion

ASTMD696

K-1×10-5

10

   Moisture absorption RH50/23?

ASTMD570

%

0.2

   Max. water absorption, 23?

%

1.2

   Flammability

UL94


HB

   Volume resistivity

IEC60093

Ocm

>1012

   Surface resistivity

IEC60093

O

>1015


PV Value of Bearings

The max PV value of the CSB-EPB series bearing is 0.4N/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 EPB-1).

1.jpg

The Relation of Load, Speed and Temperature

CSB-EPB allows the Max static load of 35Mpa, The max compressive deformation rate under the max load is listed in Graph EPB-2, The actual load capacity of bearing is slightly less than 35Mpa, The bearing load is variable against the speed and temperature, Fast speed (Vmax:1.0m/s) results into higher temperature (Tmax: 80?) which decreases the load capacity of the bearing. Please refer to the Graph EPB-3 for such variation.

The Relation of Friction Factor, Wearing and shaft material

Friction Factor

CSB-EPB friction factor is not sensitive to the operation speed and bearing loading (see Graph EPB-4 and GraphEPB-5). The above features are the most common considerations for the bearing material selection. The friction of CSB-EPB could be maintained at a relatively lower level so that the good wearing features are guaranteed. From the Graph EPB-6, we could see that the friction factor is variable against the changing of shaft roughness. The recommended shaft roughness is Ra0.3~0.5.


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


Wearing and shaft material

The shaft material is an important media for the bearing wearing but CSB-EPB is suitable for almost all kinds of shaft materials. Graph EPB-7 and Graph EPB-8 show that the wearing feature of CSB-EPB is excellent when the shaft material are hardened chrome steel or hardened steel or hardened Aluminum.

Chemical Resistance

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

Water Absorbability

The water absorb rate of CSB-EPB is 0.2% under the atmospheric pressure while it is 1.2% when the material is immerged into water. With its low water absorbability, the material is suitable for humid environment applications.

9.jpg

UV Resistance

CSB-EPB can maintain its color unchanged when it is exposed into the UV ray. The hardness, Compressive strength and wear resistance of the material is also stable under such condition.

Bearing Installation

CSB-EPB The Interfit Tolerance

d 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 epb plastic plain bearings manufacturers and suppliers, and also a professional epb plastic plain bearings factory and company, we are always at your services.

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