JDB Solid lubricating bearingsProduct description
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EPH Plastic Bearings
High temperature and good chemical resistance material. Continuous use at 200 degrees, is also suitable for use in wet environments in even chemical liquid. Rigid shaft material used in conjunction with good.
1: continuous use temperature: -40 ℃ ~ + 200 ℃;
2: For the majority of high-load situations;
3: Suitable for dry running, maintenance-free;
4: good chemical resistance;
5: Suitable wet 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
EPH series bearing the maximum operating PV value of 1.4N / mm2 * m / s; This determines the load bearing is inversely proportional to the speed and speed, the details of access to chart EPH-1.
Bearing load, speed, temperature
EPH series bearings can withstand the maximum static load of 90Mpa, in this load the maximum compression deformation of the bearing reference chart EPH-2; (Vmax: 1.0m / s) will lead to increased friction temperature, while the temperature rise (Tmax: 200 ℃) will lead to the gradual bearing capacity of the bearing capacity of the bearing capacity of Weakened, the load with the bearing temperature changes in reference to the chart EPH-3.
Coefficient of friction
The EPH-4 shows that the friction coefficient of the EPH bearing under rotation will decrease slightly with increasing speed. The EPH-5 shows that the friction coefficient of the EPH bearing under rotation remains constant as the speed remains constant Load increase gradually decreased, especially in the load is less than 30Mpa circumstances. Figure EPH-6 shows that the friction coefficient of EPH bearing roughness in the Ra0.1 ~ 0.4um almost no change, but when the shaft surface roughness greater than Ra0.4 when the friction coefficient will rise rapidly; we recommend the use of axis roughness Degree is Ra0.1 ~ 0.4um.
| EPH | Dry | Grease | Oil | Water |
| Friction coefficient μ | 0.07~0.20 | 0.09 | 0.04 | 0.04 |
Wear and shaft materials
The EPH-7 shows that the EPH bearings are suitable for most shaft materials under low load rotary motion, and the hardened steel shafts are particularly outstanding at high load revolutions (see chart EPH-7). The EPH-8 shows that the EPH bearings are made of stainless steel Swing movement is more appropriate, and in the rotation of carbon steel shaft and hardened steel shaft effect is better.
Chemical resistance
EPH plastic bearings have good chemical resistance, can resist the vast majority of acid-base.
Water absorption
In the standard atmospheric pressure, EPH plastic bearing water absorption is extremely low 0.1%, soaking water, the maximum equilibrium rate of 0.3%; therefore the material does not absorb water and the performance and size changes, suitable for use in wet environments and even underwater.
Anti-UV properties
EPH long exposure to ultraviolet radiation on the surface of the material will be transformed, anti-tower strength will decline.
Bearing installation
EPH 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 |
| ＞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 |
