Model with self-lubricating round hub and galvanized plates ``VAR.D.E.A.C./MTZ`` Discs with anticorrosive galvanizing treatment. Self-lubricating round hub, maintenance-free. Very silent during operation work. Helical springs fully protected suitable for dusty environment. Suitable for high power. Max ratio 1:3,4 – max power 18,5 Kw.