Middel
coefficient of friction : 0,55
Without asbestos
Metallic matrix
:
To withstand mechanical stresses during the braking
phase over a long time, sintered metal brake pads
originate their basic mechanical properties from
an iron based matrix. The quite high young modulus
ensures to break the water film under wet conditions.Alloys
are often added in the mix of pads materials to
manage the melting point of the metal matrix which
dictates either the decrease of the friction coefficient
or the increase of the wear. The high melting point
of RC6 (1000°C) ensures no material transfer
on the disc surface.
Graphite :
Disc pad interface during the high speed or high
load braking phase heats up to very high temperatures,
sometimes recorded above 800°C in motorsport
applications.
Graphite acts as a thermal bridge while lowering
the disc-pad contact thermal resistance, and as
a heat absorber due to its very high temperature
is kept lower.At any speed, graphite acts as a lubricant
and reduces the risk of wheel locking.
Ceramics :
Friction coefficient and wear are the result of
the additions of synthetic or natural ceramic oxides
which monitor friction coefficient value upon brake
energy dissipation.
Sinter process :
At least 15 components are mixed together. Compression
at 2 to 4 tons/cm2 takes place in a mould which
shapes the material according to outline drawing.
The friction material placed on the back plate is
then sintered at temperature of 900°C up to
1000°C depending on the grade and under reducing
nitrogen/hydrogen atmosphere. The assembly is forged,
and reaches its final shape.
The stability and the progressivness of the coefficient
of friction make it an easy-to-manage brake pad.
CARACTERISTICS
:
- high coefficient of friction (regardless of the
operating temperature)
- coefficient of friction constant for a long time-stable
coefficient of friction during braking
BEDDING
IN PROCEDURE :
Use the brakes normally but at speeds below racing
speeds, and then build up speed gradually (circuit
- 2 to 3 turns, rallye - 1 special).
Warning : Unlike bedding in procedure with plastic
resin materials, do not allow the brakes to overheat
while running in.
