We think it proper to stop briefly on the gearboxes with gear- change, among which we could deal with different subjects. Mentioning the model AT 65, a multiplier which is largely employed in the treatment field, we can state that it has an excellent balance between a transmissable power and a facility of connection and disconnection of the different speeds, a peculiarity that has turned into a synonymous with GB S.r.l. Thanks to this peculiarity, you can get remarkable results also in the zootechnical field. We are particularly referring to AP 502, 302 e 303 gearboxes, on which the GB S.r.l. custumers rely on with a complete confidence, by using not only these products, but even the different epicycloidal reducers, starting from the smallest one, PLA 1000, up to the biggest one, PLA 3000, specifically designed for animal food mixers (both vertical than horizontal).