MP Polymer Bearings
MP-300 is a thermoplastic material with a wire of fibres mixed with solid lubricants dedicated in those applications where traditional self-lubricating cannot guarantee the necessary resistance to the wear. This product has a good mechanical property and excellent self-lubricating property. The applications can be various: ranging from office supplies, medical equipments, pneumatic cylinders hinges, pedal controls, etc. The MP-300 series includes cylindrical, flanged bearings, washers and special parts.
Operating Conditions
-
DRY -
OIL -
GREASE -
WATER -
PROCESS
FLUID
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Characteristics
- Dry self-lubrications
- Excellent self-lubricating property
- Good mechanical property
- Low friction factor, either static or dynamic
- Minimized wear and excellent service life
- Good chemical strength
- Good abrasion resistance
- Easy to assembly
- Wide range of standard items available
- Special items on demand
General Properties
| Density | 1,23 g/cm3 (DIN-53479 ASTM-D792) |
|---|---|
| Max moisture absorption in water at 24 h (23°C) | 1,3 % (ISO-62) |
| Coefficient of sliding friction, dynamic | 0,08 ÷ 0,23 |
| P x V Value | 0,23 N/mm2 (Dry) |
| Color | Black |
Mechanical properties
| Tensile strength (23 °C) | 85 N/mm2 (ISO-527) |
|---|---|
| Modulus of elasticity (23 °C) | 3800 N/mm2 (ISO-527R) |
| Elongation at break (23 °C) | 5% (ISO-527) |
| Izod – Impact strength (notched) (23 °C) | 40 J/m (ASTM D256-A) |
| Charpy – Impact strength (unnotched) (23 °C) | 45 Kj/m2 (ISO 179-1) |
| Charpy – Impact strength (notched) (23 °C) | 4 Kj/m2 (ISO 179-1) |
| Max surface speed (rotating) | 1,5 m/s |
| Max surface speed (linear) | 5 m/s |
| Max static surface pressure | 60 N/mm2 |
Physical and thermal properties
| Max long term application temperature | +90°C |
|---|---|
| Min long term application temperature | -40°C |
| Coefficient of thermal expansion (+30°C +100°C) | 9 K-1 * 10-5 (DIN53752) |
Electrical properties
| Specific volume resistance | >1013cm (DIN53482) |
|---|---|
| Surface resistance | >1012cm (DIN53482) |