EPB1 Plastic Plain Bearings
EPB1 Plastic Plain Bearings
? This material is with low water absorb characteristic and high load capacity. It is widely used for the humidity condition and wear resistance requirement. The embedded special metal powder enables this material to be a detective one.
Continuous working temperature: -50?~110?;
Suitable for medium and high load operation;
Maintenance-free dry operation;
? Excellent thermol conductivity;
The Material Data Sheet
|
Typical Item |
Standard |
Unit |
CSB-EPB1 |
|
Density |
ISO1183 |
g/cm³ |
1.51 |
|
Color |
Red Brown |
||
|
Dynamic friction /steel(dry) |
0.08-.020 |
||
|
Max. PV (dry) |
N/mm²×m/s |
0.6 |
|
|
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 |
75 |
|
|
E-module |
ISO527 |
MPa |
2500 |
|
Max. static pressure of the surface, 20? |
MPa |
70 |
|
|
Shore hardness |
ISO868 |
D |
77 |
|
Continuous work temperature |
? |
-50/110 |
|
|
Short-time work temperature |
? |
-50/170 |
|
|
Thermal conductivity |
ASTME1461 |
W/m×k |
0.3 |
|
Linear coef. of thermal expansion |
ASTMD696 |
K-1×10-5 |
8 |
|
Moisture absorption RH50/23? |
ASTMD570 |
% |
0.2 |
| Max. water absorption, 23? | % | 0.5 | |
|
Flammability |
UL94 |
HB |
|
|
Volume resistivity |
IEC60093 |
Ocm |
>1014 |
|
Surface resistivity |
IEC60093 |
O |
>1015 |
PV Value of Bearings
The max PV value of the CSB-EPB1 series bearing is 0.6N/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 EPB1-1).
The Relation of Load, Speed and Temperature
CSB-EPB1 allows the Max static load of 70Mpa, The max compressive deformation rate under the max load is listed in Graph EPB1-2, The actual load capacity of bearing is slightly less than 70Mpa, The bearing load is variable against the speed and temperature, Fast speed (Vmax:1.0m/s) results into higher temperature (Tmax: 110?) which decreases the load capacity of the bearing. Please refer to the Graph EPB1-3 for such variation.
The Friction Factor,Wearing and shaft material
Friction Factor
Graph EPB1-4 shows that as the same as most of the slide bearing materials, the friction factor of CSB-EPB1 is increasing along with the rotation speed under a certain loading while as shown in figure EPB1-5, it is decreased along with the increasing of loading when the operation speed is stable. From figure EPB1-6, it is found that the most suitable shaft roughness is Ra0.2 to Ra0.6.Smoother shaft or rougher shaft may result into friction factor increasing.
|
CSB-EPBH |
Dry |
Grease |
Oil |
Water |
|
Friction coef.µ |
0.08~0.20 |
0.09 |
0.04 |
0.04 |
Wearing and shaft material
Graph EPB1-7 shows the wearing is considerably affected by the shaft materials. Heat-treated steel shaft and carbon steel shaft is good for this bearing material. CSB-EPB1 is suitable for hardened chrome steel and hardened steel shaft in oscillation operation and is suitable for hardened chrome steel and hardened steel shaft in rotation operation.
Chemical Resistance
CSB-EPB1 is good at chemical resistance against weak acidic medium and various kinds of lubricants.
Water Absorbability
The water absorb rate of CSB-EPB1 is 0.2% under the atmospheric pressure while it is 0.5% when the material is immerged into water. With its low water absorbability, the material is suitable for humid environment applications.
UV Resistance
Disintegration could be possible for the material CSBEPB1 after long period of exposing under the UV ray and therefore the performance of the material will be reduced.
Bearing Installation
CSB-EPB1 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 epb1 plastic plain bearings manufacturers and suppliers, and also a professional epb1 plastic plain bearings factory and company, we are always at your services.