Carbone of America has also developed a special brush-grade material, A 368. These slip rings, although developed for wind-power generators, can also be used on industrial asynchronous motors.

Products from Carbone of America, Boonton, NJ, meet the electrical requirements of wind-power generators. A few include specially developed brush grades, patented carbon slip-ring assemblies, and slip-ring assemblies with bronze rings. Additional products include brush holders and pressure systems, all engineered and designed by the company engineers and tested in its labs.

For example, one slip-ring assembly in particular developed for wind-power generators has a lower weight than previous designs, no corrosion of the carbon, and a lifetime or brush wear of 0.1mm/1,000 hr. The assembly also sports excellent no-load and low-current operation, it tolerates high peripheral speeds, and makes it possible to reduce the IP protection index of the slip ring assemblies.