● Optimized for middle load applications. It is suitable for low frequency motion and low cost requirement
● Continuous working temperature: -40℃/+100℃
● High load capacity
● Good economic ratio
● Dry operation and maintenance free
● Applicable for various shaft materials
Material properties | Standard | Unit | CSB-EPB3G |
General properties | |||
Color | - | - | Black |
Density | ISO1183 | g/cm3 | 1.37 |
Max. moisture absorption, 50%RH | ISO62 | % | 1.3 |
Max. water absorption | ISO62 | % | 5.5 |
Coefficient of sliding friction(steel) | ITS025 | µ | 0.05-0.15 |
Max. PV value | ITS026 | N/mm2×m/s | 0.30 |
Mechanical properties | |||
Flexural modulus | ISO178 | MPa | 7700 |
Flexural strength | ISO178 | MPa | 190 |
Max. static load | ITS027 | MPa | 75 |
Max. dynamic load | ITS028 | MPa | 36 |
Shore hardness | ISO868 | D | 78 |
Physical and thermal properties | |||
Long-term application temperature | ITS029 | ℃ | +100 |
Short-term application temperature | ITS029 | ℃ | +160 |
Lowest application temperature | ITS029 | ℃ | -40 |
Thermal conductivity | ISO22007 | W/m/K | 0.24 |
Coefficient of thermal expansion | ISO11359 | K-1×10-5 | 11 |
Flammability | UL94 | Class | HB |
Electrical properties | |||
Volume resistance | IEC60093 | Ω·cm | >1012 |
Surface resistance | IEC60093 | Ω | >1011 |
*ITS: CSB company's internal test standards. **Test temperatures are 23℃ unless otherwise stated.
The max PV value of the CSB-EPB3G plastic bearings 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 EPB3G-1).
CSB-EPB3G allows the Max static load of 75Mpa, The max compressive deformation rate under the max load is listed in Graph EPB3G-2, The actual load capacity of bearing is slightly less than 75Mpa, The bearing load is variable against the speed and temperature, Fast speed (Vmax: 0.8m/s) results into higher temperature (Tmax: 100℃) which decreases the load capacity of the bearing. Please refer to the Graph EPB3G-3 for such variation.
Graph EPB3G-4 and Graph EPB3G-5 show that the friction factor of CSB-EPB3G is variable along with the changing of the operation speed and bearing loading especially when the bearing loading is within 20Mpa. In the mean while the Graph EPB3G-6 shows that the friction factor of CSB-EPB3G is also affected by the shaft surface roughness. Too rough shaft surface or too fine shaft surface will increase the wearing and friction factor. The recommended shaft surface roughness is Ra0.1~0.3.
CSB-EPB3G | Dry | Grease | Oil | Water |
Friction coef. μ | 0.05~0.15 | 0.09 | 0.04 | 0.04 |
Graph EPB3G-7 and Graph EPB3G-8 show that the wearing of CSB-EPB3G is similar either against the normal shaft or hardened shaft. The most suitable shaft materials for CSB-EPB3G are hardened steel and hardened chrome steel. Graph EPB3G-7 shows that the wearing feature is better in oscillation operation than in rotation operation.
CSB-EPB3G is good at chemical resistance against weak acidic medium and various kinds of lubricants.
The moisture absorption of CSB-EPB3G plastic plain bearings is 1.3% in standard atmosphere. The max. water absorption is 5.5% in water. The application environment has to be considered due to the high water absorbtion properties.
CSB-EPB3G can maintain its color unchanged when it is exposed into the UV ray. The material performance stays stable.
CSB-EPB3G Tolerances after pressfit
Diameter [mm] | CSB-EPB3G E10 [mm] | Housing H7 [mm] | Shaft h9 [mm] |
>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 |
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▊CSB-EPB® Plastic Bearings Finder[V2.1] is based on the analysis and calculation of a large number of test data in CSB® laboratory. You can calculations material data by entering parameters such as bearing load, speed, and temperature, and finally output material adaptation data.
▊Because the system calculate and analyze based on lab data, it can't exactly meet the ractual use requirements absolutly. The system data verification has certain limitations; CSB® recommends that the bearing must be tested again to verify whether it meets the actual use requirements.
▊CSB-EPB® Plastic Bearings Finder output data information is only for design reference, and can not be used as the final standard for determining the bearing material conformity, If you have any questions, please contact CSB® sales engineers.
▊CSB-SFP® Semi-finished Products Finder[V2.0] is based on the analysis and calculation of a large number of test data in CSB® laboratory. You can calculations material data by entering parameters such as bearing load, speed, and temperature, and finally output material adaptation data.
▊Because the system calculate and analyze based on lab data, it can't exactly meet the ractual use requirements absolutly. The system data verification has certain limitations; CSB® recommends that the products must be tested again to verify whether it meets the actual use requirements.
▊CSB-SFP® Semi-finished Products Finder output data information is only for design reference, and can not be used as the final standard for determining the bearing material conformity, If you have any questions, please contact CSB® sales engineers.
Medium | EPB3G bearings resistance |
Alcohol | Resistant |
Hydrocarbons | Resistant |
Greases. oils | Resistant |
Fuels | Resistant |
Diluted acids | Conditionally resistant |
Strong acids | Not resistant |
Diluted alkalis | Resistant |
Strong alkalis | Conditionally resistant |
Please select bearing material and medium...
▊CSB® bearing material chemical resistance data is a comparison test result of the CSB chemistry laboratory using laboratory specimens or similar chemicals at room temperature 23 ℃, without considering the impact of other temperatures and chemical medium mixtures on the chemical resistance of CSB® bearing materials ; Therefore, this data can only act as a reference. CSB® recommends that the chemical resistance of actual parts should be tested under application conditions and verify the suitability of the 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...
moreThe combination of middle to low load and low speed application requirement. It is a material without PTFE embedded for the low cost and big quantity demanding. Continuous working temperature: -40℃/+80℃
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