MP-300

MP-300 bearing structure

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

Very Good Good Good Fair Fair

Availability

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)
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