EPB26 Plastic Plain Bearings
EPB26 Plastic Plain Bearings
| Product Features |
- Suitable for soft shafts
- Excellent wear resistance
- Operation temperature up to +200℃
- Good resistance to chemicals
- High elasticity
| Material Properties Data Sheet |
| Material Properties | Standard | Unit | CSB-EPB26 | |
| Colour | - | - | Beige | |
| Density | ISO1183 | g/cm³ | 1.51 | |
| Max. Moisture Absorption, 50%RH | ISO62 | % | 0.1 | |
| Max. Water Absorption | ISO62 | % | 0.2 | |
| Dynamic Friction Coefficient against Steel | ITS025 | μ | 0.15~0.20 | |
| Max. PV Value | ITS026 | N/mm² x m/s | 0.50 | |
| Flexural Modulus | ISO178 | MPa | 4500 | |
| Flexural Strength | ISO178 | MPa | 95 | |
| Max. Static Load | ITS027 | MPa | 55 | |
| Max. Dynamic Load | ITS028 | MPa | 22 | |
| Shore Hardness | ISO868 | D | 74 | |
| Long-term Application Temperature | ITS029 | ℃ | +200 | |
| Short-term Application Temperature | ITS029 | ℃ | +240 | |
| Lowest Application Temperature | ITS029 | ℃ | -40 | |
| Thermal Conductivity | ISO22007 | W/m/K | 0.24 | |
| Thermal Expansion Coefficient | ISO11359 | K-1 x 10-5 | 3 | |
| Flammability | UL94 | Class | V0 | |
| Volume Resistance | IEC60093 | Ω·cm | >1012 | |
| Surface Resistance | IEC60093 | Ω | >1012 | |
*ITS: Internal test standards of CSB Compnay.
**Test temperature: 23℃ unless otherwise stated.
| PV Value |
The Max. PV value of the CSB-EPB26 engineer plastic bearings is 0.5N/mm² x 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 EPB26-1).
Graph EPB26-1
| Load, Speed and Temperature |
The allowed Max. static load of CSB-EPB26 is 55Mpa. The maximum compressive deformation rate under 55Mpa is listed in Graph EPB26-2. The actual load capacity is slightly less than 55Mpa. The load is variable against the speed and temperature. High speed causes higher temperature; Vmax. is0.9m/s, while Tmax. is 200℃. Higher temperature will decrease the load capacity of the bearing. Please refer to the Graph EPB26-3 for such variation.
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Graph EPB26-2
Graph EPB26-3| Friction Factor, Wear and Shaft Material |
Graph EPB26-6
We can tell from Graph EPB26-6 that the friction factor of CSB-EPB26 is increasing along with the increase of the shaft roughness. The recommended shaft roughness is Ra0.1 to 0.6um.
| CSB-EPB26 | Dry | Grease | Oil | Water |
| Friction Coef. μ | 0.15~0.20 | 0.09 | 0.04 | 0.04 |
Graph EPB26-7 and Graph EPB26-8 tells that the CSB-EPB26 is very good for both hardened shaft and soft shaft. It is a excellent solution for both hardened steel shaft and stainless steel shaft. Only the hardened aluminum shaft is not a good choice. The wear resistant of CSB-EPB26 is better on rotation operation than on oscillation operation.
 Graph EPB26-7 |  Graph EPB26-8 |
| Material Features |
The chemical resistance of CSB-EPB26 is fairly good against most Acid and Alkalis.
The moisture absorption of CSB-EPB26 plastic plain bearings is 0.1% in standard atmosphere while the Max. water absorption is 0.2% in water. These values are very low so that CSB-EPB26 plastic palin bearings is very suitable for application in wet environments.
Disintegration can be possible for the material CSB-EPB26 after a long period exposed to the UV ray and its compressive strength will be reduced.
| Drawing for Reference |
 Sleeve Bearing |  Flange Bearing |  Thrust Washer |
Drawing Download Link: EPB26 Drawing
| EPB26 Installation Tolerances |
CSB-EPB26 Tolerances after Pressfit:
Diameter(mm) | CSB-EPB26 [E10](mm) | Housing Bore [H7](mm) | Shaft [h9](mm) |
>0~3 | +0.006~+0.046 | 0~+0.010 | 0~-0.025 |
>3~6 | +0.010~+0.058 | 0~+0.012 | 0~-0.030 |
>6~10 | +0.013~+0.071 | 0~+0.015 | 0~-0.036 |
>10~18 | +0.016~+0.086 | 0~+0.018 | 0~-0.043 |
>18~30 | +0.020~+0.104 | 0~+0.021 | 0~-0.052 |
>30~50 | +0.025~+0.125 | 0~+0.025 | 0~-0.062 |
>50~80 | +0.030~+0.150 | 0~+0.030 | 0~-0.074 |
| CSB®EPB26 Standard Products |
EPB3\EPB3G\EPB9\EPB12\EPB16\EPB20\EPB21\EPB22\EPB26 Standard Specification
