MP-G

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

Dry

Oil

Grease

Water

Process fluid

Very Good Good Good Fair Fair

Availability

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)

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MP-G Polymer Sliding Bearings | Product Data Sheet
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