Paper Transmission Discs

Paper friction material although produced by paper making practises these materials are in fact elaborate composite structures which are made up of paper fibre, diatomite, carbon & friction powder. The materials porosity can reach highs of 70%. The production process consists of moulding the compound using heat & pressure, once the resin has solidified the material is blanked from sheet form & bonded to the steel core plate. Once this process is finished the final thicknesses & groove patterns are then machined to the surface. These are typically found in applications such as power shift transmissions & wheel brakes.

The following are properties that are associated with this type of material:

> Porous structure and flexibility
> Low ratio of static to dynamic coefficient of friction
> Smooth engagement
> Excellent energy capability
> Good wear resistance

Parameter Wet Application Dry Application
  • Dynamic Coefficient (μd)
  • Static Coefficient (μs)
  • Wear Rate (λ)
  • Conditions of Application
  • 0.10 – 0.14
  • >= 0.14
  • <= 2.0x10-8cm3/J
  • Specific Pressure: <= 9MPa Linear Velocity: <= 40m/s Oil Temperature: <= 200 ºC
  • N/A
  • N/A
  • N/A
  • N/A
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