ADDAX Composite Coupling Addax pioneered and introduced the first advanced composite couplings to the cooling tower industry in 1987. Floating shaft couplings are use to connect units which are relatively far apart. Such arrangements are particularly suited to transmit power into areas where moisture, dust or corrosive conditions would adversely affect the driving machinery. Typical applications include cooling tower fan drives, paper machinery, printing presses, pumps and compressors.