Main features

Motor bases are mainly used to recover automatically belt lengthening and to counter the static torques during the starting of the engines. These motor supports take advantage of the same technology of CRESA tensioners and VIB elastic elements to develop a torque moment that keeps always the belts in tension. Engine range from 0.75Kw to 250Kw can be applied on motor bases. In the belt transmission the engine torque of the engine is propagated only by the friction, created between the driving pulley and the belts themselves. For this reason it is very important to keep always the tension on the belts, which allows to keep enough friction force in order to avoid any slipping on the pulley. These slippings can cause both an torque transmission of the torque and a sudden wear of the belts and pulleys. The automatic motor bases allow therefore to keep a constant tension on the belts, avoiding manual adjustments with the relative economic expenditure both for the maintenance and for the machine stops. Motor bases are widely used in screen motorization, crushers and feeders, where the starting of an eccentric h the operation of a eccentric for the motion of the vibrating channel, causes several vibrations and continuous changes of the interaxis distance between the driving and driven pulley. It is for this reason inevitable the use of an elastic motor support that allows to absorb the vibrations and to keep always constant the tension on the belts. The models size 90 – 110 can be supplied with hydraulic preloading systems at closed circuit.