Our clutch assemblies provide some of the most compact installations along with an extremely low Moment of Inertia (M.O.I), this is due to the extreme care and dedication that goes into not only the design of the clutch, but also the selection of the materials and machining processes involved.
A good example of this is our proprietary (unique to us) friction material, Sintered Bronze Metallic which is used in all our competition applications and should not be confused with the Sintered material which other manufacturers use.
If you look at other Sintered friction discs you will see that the surface finish is quite poor and rough, this means that the clutch must bed in from new and after the first few launches a significant amount of material will be scrubbed off thus shortening the life of these particular discs, the material composition which they have chosen is also far more aggressive and will snatch or grab, so in general users do not give good feedback on how they feel.
PTT friction material has much smoother engagement characteristics and is micro finished so there is no bedding in and as such it has a much longer life than other manufacturers material.
We also see that these other friction materials, being more aggressive, eat up the mating parts whereas our material does not.
On a PTT clutch, you can usually just replace discs when they are worn.
It is rare for us to see a floater plate or pressure plate that has more than .001” of wear.
Floater plates and pressure plates are only replaced when they are warped due to excessive heat.
Cerametallic means that the disc has ceramic material in it which (in a racing clutch application) is little pieces of glass or sand and will eat up the mating parts (floater plate, pressure plate and flywheel) and is why we chose not to use it.
For very extreme applications, we move across to Sintered Iron Metallic friction material if we are looking for every last lb of torque capacity, but it is extremely rare that we need to do this.