JDB Solid lubricating bearingsProduct description
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EPX Plastic Bearings
High temperature and good chemical resistance materials. Can be used at 200 degrees under continuous use, but also suitable for wet environments and even chemical liquids. Hard shaft material with the use of better.
1: continuous use temperature: -40 ℃ ~ +200 ℃;
2: suitable for most high-load applications;
3: suitable for dry operation, maintenance-free;
4: Good chemical resistance;
5: suitable for use in humid environments.
Material property sheet
| Material Properties Table | |||
| Common Capability | Unit | EPH | Testing Method |
| Density | g/cm³ | 1.65 | |
| Color | Grey | ||
| Max.water absorption,23℃/ 50% | [%weight] | 0.1 | DIN 53495 |
| Max.water absorption | [%weight] | ＜3 | |
| Dynamic friction /steel | μ | 0.07-0.20 | |
| Max.PV（dry） | MPa•m/s | 1.37 | |
| Mechanical behavior | |||
| E-module | MPa | 12,500 | DIN 53457 |
| Tensile strength,20℃ | MPa | 175 | DIN 53452 |
| Compressive strength | MPa | 81 | |
| Max.static pressure of the surface,20℃ | MPa | 90 | |
| Shore D hardness | 87 | DIN 53505 | |
| Physical and thermal properties | |||
| Continuous work tempreature | ℃ | +200 | |
| short-time work tempreature | ℃ | +240 | |
| Minimum operating temperature | ℃ | -40 | |
| Thermal conductivity | W/m•K | 0.6 | ASTM C 177 |
| Thermal expansion,23℃ | K | 4 | DIN 53752 |
| Conductive propertiesK-1•10-5 | |||
| Volume resisticity | Ωcm | ＞104 | DIN IEC 93 |
| Surface resisticity | Ω | ＞105 | DIN 53482 |
Bearing PV value
EPX series bearing the maximum running PV value of 1.5N / mm2 * m / s; This determines the load bearing is inversely proportional to the speed and load, the details of access to chart EPX-1.
Bearing load, speed, temperature
EPX series bearings can withstand the maximum static load of 150Mpa, in this load the maximum compression deformation of the bearing reference chart EPX-2; (Vmax: 1.5m / s) will lead to increased friction temperature, while the temperature rise (Tmax: 250 ℃) will lead to the gradual bearing capacity of the bearing capacity of the bearing load capacity Weakened, the load with the bearing temperature changes in reference to the chart EPX-3.
Coefficient of friction
Figure EPX-4 shows that the friction coefficient of the EPX bearing at a certain load with the speed increases gradually; EPX-5 shows EPX bearings in the speed of a certain load within 20Mpa when the friction coefficient will gradually increase with the load And the change of friction coefficient is more gentle when the load is higher than 20Mpa. Figure EPX-6 EPX bearings show that the more suitable shaft surface roughness Ra0.6 ~ 0.8um.
| EPX | Dry | Grease | Oil | Water |
| Friction coefficient μ | 0.07~0.20 | 0.09 | 0.04 | 0.04 |
Wear and shaft materials
The EPX-8 test shows that the running of the EPX bearing on different shafts is comparable to wear. The stainless steel and carbon steel shafts are suitable for rotational movement below 2 MPa. When the load is more than 2 MPa, Steel shaft and carbon steel shaft running better. EPX-7 shows that the EPX bearings are more suitable for rotary motion; it is particularly noteworthy that the EPX-9 EPX bearings show that the friction and wear properties of the EPX bearing at room temperature 23 ℃ and not at high temperature 150 ℃ excellent.
Chemical resistance
EPX plastic bearings with good chemical resistance, resistant to 65% concentration of strong acid.
Water absorption
In standard atmospheric pressure, EPX plastic bearing water absorption is extremely low 0.1%, soaking water, the maximum equilibrium rate of 0.5%; so the material does not absorb water and the performance and size changes, suitable for use in humid environments.
Anti-UV properties
EPX long-term exposure to ultraviolet light in the material properties will not change.
