MP-G bearing structure

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





Process fluid

Very Good Good Good Fair Fair



  • 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)
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