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Zhejiang CSB Plastic Bearing
Technology Co.,Ltd

Address: No.6, Fenhu Road, Huimin Sub-district, Jiashan, 
Zhejiang, China

Tel: +86-573-84185528

E-mail: oversea@csb-ep.com

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Plastic Bearings

EPB21 Plastic Plain Bearings

EPB21 Plastic Plain Bearings

EPB21 Plastic Plain Bearings Low friction and good wear resistance for high temperature applications. The excellent chemical resistance of the material ensures athe applications for high temperature and high chemical erosion applications. Continuous working temperature: -40?~200?; Very low...

EPB21 Plastic Plain Bearings

Low friction and good wear resistance for high temperature applications. The excellent chemical resistance of the material ensures athe applications for high temperature and high chemical erosion applications.

Continuous working temperature: -40?~200?;

Very low coefficient of friction;

Maintenance-free dry operation;

High temperature and good chemical resistance;

Suitable for humid environment.

The Material Data Sheet

Typical Item

Standard

Unit

CSB-EPB21

   Density

ISO1183

g/cm³

1.53

   Color



Buff

   Dynamic friction /steel(dry)



0.05-0.20

   Max. PV (dry)


N/mm²×m/s

0.80

   Max. roatating velocity


m/s

2.00

   Max. oscillating velocity


m/s

1.00

   Max. linear velocity


m/s

5.00

   Tensile strength

ISO527

MPa

55

   Compressive strength (Axial)


MPa

78

   E-module

ISO527

MPa

2800

   Max. static pressure of the surface, 20?


MPa

80

  Shore hardness

ISO868

D

77

   Continuous work temperature


-40/200

   Short-time work temperature


-40/240

   Thermal conductivity

ASTME1461

W/m×k

0.5

   Linear coef. of thermal expansion

ASTMD696

K-1×10-5

5

   Moisture absorption RH50/23?

ASTMD570

%

0.1

   Max. water absorption, 23?
%0.3

   Flammability

UL94


V0

   Volume resistivity

IEC60093

Ocm

>1012

   Surface resistivity

IEC60093

O

>1011

PV Value of Bearings

The max PV value of the CSB-EPB21 series bearing is 0.8N/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 EPB21-1).

The Relation of Load, Speed and Temperature

CSB-EPB21 allows the Max static load of 80Mpa, The max compressive deformation rate under the max load is listed in Graph EPB21-2, The actual load capacity of bearing is slightly less than 80Mpa, The bearing load is variable against the speed and temperature, Fast speed (Vmax: 2.0m/s) results into higher temperature (Tmax: 200?) which decreases the load capacity of the bearing. Please refer to the Graph EPB21-3 for such variation.


The Friction Factor,Wearing and shaft material

Friction Factor 
 Friction factor will be slightly decreased along with the speed increasing under certain loading of the rotation operation (see Graph EPB21-4) and it will be slightly decreased along with the loading increasing under certain speed of the rotation operation especially when the loading is less than 30Mpa. Graph EPB21-5 tells that the friction of the CSB-EPB21 is not changed at all when the shaft roughness is between Ra0.3 to Ra0.4 and will be considerably increased when the shaft roughness is over Ra0.4. So

CSB-EPB21
Dry
Grease
Oil
Water
Friction coef. µ
0.03~0.15
0.09
0.04
0.04


Wearing and shaft material

Graph EPB21-7 shows that CSB-EPB21 is suitable for most of the shaft materials under low loading rotation operation and it is good for hardened carbon steel shaft under high loading rotation operation (see Graph EPB21-7). From Graph EPB21-8, we can also read that CSB-EPB21 is suitable for stainless steel shaft under oscillation operation and good for hot rolled carbon steel and hardened carbon steel shaft under rotation operation.

Chemical Resistance

The Chemical Resistance of CSB-EPB21 is fairly good against most of Acid and Alkalis.

Water Absorbability

The water absorb rate of CSB-EPB21 is 0.1% under the atmospheric pressure while it is 0.3% 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

Disintegration could be possible for the material CSBEPB21 after long period of exposing under the UV ray and therefore the compressive strength will be reduced.

Bearing Installation

CSB-EPB21A 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 epb21 plastic plain bearings manufacturers and suppliers, and also a professional epb21 plastic plain bearings factory and company, we are always at your services.

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Zhejiang CSB Plastic Bearing Technology Co.,Ltd