Performance unattainable with carbon clutches The development concept for COPPERMIX clutch facings was based on two different needs: the desire to increase allowable power output without changing the cover gripping power, and to improve operations in traffic jams-to provide a sport clutch that anyone can use in regular driving. First brought to the market in 2002, COPPERMIX provides greatly improved single clutch performance, increasing the ease of use while also providing high transmission performance. COPPERMIX’s transmission performance greatly exceeds that of other manufacturers, and is popular with a range of users from beginners to top tuners.
COPPERMIX is a registered trademark of Nissan Motorsports International Co.,LTD. Beware of imitations. Facings marked “F808MCC” or “F510MCC” are indications of genuine COPPERMIX products.
About COPPERMIX
This is a completely new facing created using a special production method that binds the two different friction Materials of metal and non-asbestos with a higher dimension of union. It could be said to be "a metal that contains non-asbestos" or "a non-asbestos that contains metal". Here, the word metal refers to an aggregate of copper, which generates” even in high temperature ranges and which is also included in the non-asbestos facing. COPPERMIX is produced by using this non-asbestos production method to greatly increase the amount of copper that is contained in the facing.
[ Performance unattainable with carbon clutches ]
Excellent μ control has been achieved
ln the low temperature range, COPPERMIX utilizes the high μ characteristics of the non-asbestos material, and in the high temperature range it utilizes the stable μ characteristics of the metal to provide excellent μ control. Non-asbestos has high μ in the initial range, but as the temperature increases (during sports driving) , the μ decreases. Metal, on the other hand, does not have as high a μ as non-asbestos, but it does generate a stable μ even in high temperature ranges. Possessing both of these characteristics makes it possible to generate the ideal μ from the low to the high temperature range. For example, always being able to use the optimum μ during clutch operation where temperature change is severe, such as when shifting down low temperature after driving straight for along period of time or when operating the clutch pedal to adjust the angle during cornering, not only makes the clutch easier to operate but also greatly reduces the load on the clutch disc. This also makes it easier to respond to temperature changes during actual driving and provides a performance that exceeds that of metal facings. COPPERMIX is not affected by differences in driving technique quality, which is proof that this is a high-performance clutch that anyone can use without concern.
Special production method creates - a tough facing binding force
COPPERMIX achieves high performance by increasing the amount of copper contained (50％ by weight) in the non-asbestos facing. If a large amount of copper is mixed into conventional non-asbestos material, the binding performance declines and decreases the burst resistance performance. In COPPERMIX this problem is successfully overcome by using a special production method to attach a back plate (steel) to the back of the facing and to achieve a tough facing binding force.
Use of a cushioning plate for easier operation
A cushioning plate (corrugated plate between the two facings) is incorporated*1 to absorb the connection shock from the non-asbestos initial high μ to make it easier to operate the clutch pedal.
*1 In SUPER COPPERMIX TWIN, the cushion plate has been eliminated and reduces linkage vibration using the center hub.
* A genuine part clutch also achieves ease of use during general driving by incorporating a cushion plate in the non-asbestos lacing (initial high μ) and set low application pressure cover.
Excellent anti-burst performance
NISMO clutches clear testings on both normal burst temperature value (20℃) and hot burst value (200℃).
Note: Burst values are based on in-vehicle rotational burst examination.
Reference: Comparison with carbon facings
Carbon clutches have a low absolute μ(carbon = 0.18, COPPERMIX = 0.38); the result is that to ensure the same transmission force (allowable torque), twice the engagement pressure is required, meaning a much heavier pressure must be applied to the pedal. At the same time, this low absolute μmeans that for the faces to smoothly interconnect, upshifting and downshifting means a continuous condition of sliding, greatly increasing wear. COPPERMIX, however, responds to the generation of heat with a suitable level of μ changing the conditions of use and providing the proper resistance characteristics. As further reference, in NISMO standard testing, SUPER COPPERMIX TWIN can cover binding force of 1000kgfm and torque of 84kgfm (kinetic friction), where a NISMO prototype carbon twin began to slip at 1200kgfm and torque of 54kgfm (kinetic friction). To control abrasion with carbon clutches in motor sport use, a number of pressure plates of different thicknesses are used, but this is not possible with the carbon clutches which the average consumer can purchase. (Data as of December, 2005.)