The main shaft with machined excenters on the LIWELL® screening machines runs in large roller bearings.
Two are installed on the inner frame and two for the outer frame.
The inner frame is supported by rubber isolating springs and the outer frame is suspended from the inner frame by fibreglass guide springs, enabling an almost linear motion.
The flexible screen mats are mounted to cross bars alternately fastened to the inner and outer frames. Rubber aprons protect the cross bars (not for wear, but to prevent the freezing on of fines). The mats are
clamped to the cross bars with clamping bars by means of stainless steel acorn nuts.