EPBH Plastic Plain Bearings
EPBH Plastic Plain Bearings
? This material is developed against the requirement of wear resistance and economic cost for cost effective and big quantity comsuming applications.
Continuous working temperature: -40?~80?;
Suitable for most of average and low load;
Maintenance-free dry operation;
Low cost for high quantities
The Material Data Sheet
|
Typical Item |
Standard |
Unit |
CSB-EPBH |
|
Density |
ISO1183 |
g/cm³ |
1.45 |
|
Color |
Black |
||
|
Dynamic friction /steel(dry) |
0.05-.020 |
||
|
Max. PV (dry) |
N/mm²×m/s |
0.3 |
|
|
Max. roatating velocity |
m/s |
0.8 |
|
|
Max. oscillating velocity |
m/s |
0.6 |
|
|
Max. linear velocity |
m/s |
2.5 |
|
|
Tensile strength |
ISO527 |
MPa |
75 |
|
Compressive strength (Axial) |
MPa |
60 |
|
|
E-module |
ISO527 |
MPa |
2200 |
|
Max. static pressure of the surface, 20? |
MPa |
30 |
|
|
Shore hardness |
ISO868 |
D |
74 |
|
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-EPBH series bearing is 0.3N/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 EPBH-1)
The Relation of Load, Speed and Temperature
CSB-EPBH allows the Max static load of 30Mpa, The max compressive deformation rate under the max load is listed in Graph EPBH-2, The actual load capacity of bearing is slightly less than 30Mpa, The bearing load is variable against the speed and temperature, Fast speed (Vmax:0.8m/s) results into higher temperature (Tmax:80?) which decreases the load capacity of the bearing. Please refer to the Graph EPBH-3 for such variation.
The Friction Factor,Wearing and shaft material
Friction Factor
CSB-EPBH friction factor is not sensitive to the operation speed and bearing loading (see Graph EPBH-4 and Graph EPBH-5). The above features are the most common considerations for the bearing material selection. The friction of CSB-EPBH could be maintained at a relatively lower level so that the good wearing features are guaranteed. From the Graph EPBH-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-EPBH is suitable for almost all kinds of shaft materials. Graph EPBH-7 and Graph EPBH-8 show that the wearing feature of CSB-EPBH is excellent when the shaft material are hardened chrome steel or hardened steel or hardened Aluminum.
Chemical Resistance
CSB-EPBH is good at chemical resistance against mild base, weak acidic medium and various kinds of lubricants.
Water Absorbability
The water absorb rate of CSB-EPBH 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.
UV Resistance
CSB-EPBH 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-EPBH 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 epbh plastic plain bearings manufacturers and suppliers, and also a professional epbh plastic plain bearings factory and company, we are always at your services.