JDB Solid lubricating bearings产品介绍
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EPS Plastic Bearings
High-speed low-cost solution. Lower temperature of 260 degrees can resist almost all chemical liquid corrosion. Not suitable for high load. Bad environment temperature is higher than 135 degrees to be considered additional limit device.
1: continuous use temperature: -200 ℃ ~ + 260 ℃;
2: suitable for dry running, maintenance-free;
3: a low coefficient of friction requirements;
4: For light-load high-speed motion;
5: high chemical resistance;
6: suitable for liquid run;
Material property sheet
| Material Properties Table | |||
| Common Capability | Unit | EPS | Testing Method |
| Density | g/cm³ | 1.24 | |
| Color | Beige | ||
| Max.water absorption,23℃/ 50% | [%weight] | 2.02 | DIN 53495 |
| Max.water absorption | [%weight] | ＜0.1 | |
| Dynamic friction /steel | μ | 0.05-0.15 | |
| Max.PV（dry） | MPa•m/s | 0.4 | |
| Mechanical behavior | |||
| E-module | MPa | 830 | DIN 53457 |
| Tensile strength,20℃ | MPa | 18 | DIN 53452 |
| Compressive strength | MPa | 10 | |
| Max.static pressure of the surface,20℃ | MPa | 10 | |
| Shore D hardness | 73 | DIN 53505 | |
| Physical and thermal properties | |||
| Continuous work tempreature | ℃ | +260 | |
| short-time work tempreature | ℃ | +310 | |
| Minimum operating temperature | ℃ | -200 | |
| Thermal conductivity | W/m•K | 0.24 | ASTM C 177 |
| Thermal expansion,23℃ | K | 12 | DIN 53752 |
| Conductive propertiesK-1•10-5 | |||
| Volume resisticity | Ωcm | ＞1015 | DIN IEC 93 |
| Surface resisticity | Ω | ＞1015 | DIN 53482 |
Bearing PV value
EPS series bearing the maximum operating PV value of 0.3N / mm2 * m / s; thus decisions Fixed bearings to withstand load and speed is inversely proportional to review in detail the chart EPS-1.
Bearing load, speed, temperature
EPS series bearings can withstand the maximum static load of 8Mpa, contained here The maximum compression deformation of the bearing under the load reference to the chart EPS, bearing the actual Working load slightly less than 8Mpa, the load is also affected by the speed and temperature of the shadow , The faster the speed (Vmax: 2.Om / s) will lead to friction temperature rise, while the temperature (Tmax: 260 ℃) will lead to bearing bearing capacity is gradually weakened, Load with the bearing operating temperature changes in the reference chart EPS-3.
Coefficient of friction
Typically, the plastic bearing increases with speed, its wear resistance and The friction coefficient will decline, but the EPS bearing due to high-speed changes (See figure EPS-4 versus figure EPS-5); according to Fig EPS-6 shows the friction coefficient of EPS bearings will be subject to the grinding axis The surface roughness of the impact of changes, we recommend the use of the shaft bearing table The surface roughness is Ra0.2 - 0.5um.
| EPS | Dry | Grease | Oil | Water |
| Friction coefficient μ | 0.03~0.15 | 0.09 | 0.04 | 0.04 |
Wear and shaft materials
Shaft material has a great impact on the bearing wear, but EPS bearings for a few As can be seen from Figure EPS-8, when using hard chrome steel shafts Or hardened steel shaft when the wear characteristics of EPS bearings are very good. Fig EPS-7 shows that EPS bearings are more suitable for rotary motion applications.
Chemical resistance
EPS plastic bearings have excellent chemical resistance, resistance to concentration 65% of the strong acid.
Water absorption
In the standard atmospheric pressure, EPS plastic bearing water absorption is extremely low 0.1%, soaking water, the maximum equilibrium water absorption of less than 0.1%; so the material will not Water absorption and performance and size changes, suitable for use in wet environments and underwater.
Anti-UV properties
EPS long-term exposure to ultraviolet light under the material properties will not change.
Bearing installation
EPS series bearings with the tolerance
| d mm² | 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 |
