MP-G Polymer Bearings
MP-G is a thermoplastic material with a wire of fibers mixed with solid lubricants. The product shows a good wear proofing feature, the solid lubricants reduces the friction factor and form, by micro abrasion, an excellent sliding surface with the counter-piece. There are several applications, ranging from office supplies, to medical equipment, pneumatic cylinders, hinges, rudder bars, etc. The MP-G series includes cylindrical and flanged bearings as well as washers, and special parts are available on demand.
Operating Conditions
-
DRY -
OIL -
GREASE -
WATER -
PROCESS
FLUID
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Characteristics
- Dry self-lubrications
- Low friction factor, either static or dynamic
- Minimized wear and excellent service life
- Good chemical strength
- Ideal for rotary, swinging or linear movements
- Good abrasion resistance
- Easy to assembly
- Wide range of standard items available
- Special items on demand
General Properties
| Density | 1,44 g/cm3 (DIN-53479 ASTM-D792) |
|---|---|
| Max moisture absorption in water at 24 h (23°C) | 0,7 % (ISO-62) |
| Coefficient of sliding friction, dynamic | 0,80 ÷ 0,20 |
| P x V Value | 0,42 N/mm2 (Dry) |
| Color | Dark Grey |
Mechanical properties
| Tensile strength (23 °C) | 142 N/mm2 (ISO-527) |
|---|---|
| Modulus of elasticity (23 °C) | 7900 N/mm2 (ISO-527R) |
| Elongation at break (23 °C) | 3,6% (ISO-527) |
| Izod – Impact strength (notched) (23 °C) | 88 J/m (ASTM D256-A) |
| Charpy – Impact strength (unnotched) (23 °C) | 74 Kj/m2 (ISO 179-1) |
| Charpy – Impact strength (notched) (23 °C) | 7,8 Kj/m2 (ISO 179-1) |
| Max surface speed (rotating) | 1 m/s |
| Max surface speed (linear) | 4,0 m/s |
| Max static surface pressure | 80 N/mm2 |
Physical and thermal properties
| Max long term application temperature | +130°C |
|---|---|
| Min long term application temperature | -40°C |
| Coefficient of thermal expansion (+30°C +100°C) | 4 K-1 * 10-5 (DIN53752) |
Electrical properties
| Specific volume resistance | >1013cm (DIN53482) |
|---|---|
| Surface resistance | >1012cm (DIN53482) |