BERTINI has developed and is currently producing a type of hubs provided with a line of small steel balls called "four contact points".
     These hubs, designed for seeding dises, fertilization, gauge wheels, coulters and rear closing wheels, feature a load capacity 5 times superior if compared to conventional kind of bearings (e.g.: 6205), thus assuring a long-lasting, no maintenance life.
     This is an exclusive BERTINI design.