Electro welded metallic structure bearing belts conveyor. Conveyor on under belt plane and support slots, supplied with draft pulleys. Sec. B belts, winding on pulleys, with swinging shafts and supports. Speed variable motorization through mechanical speed change gear. Lateral guide unit on regulating slots ended with fixing clamps. Finishing through galvanizing and epoxies painting. Electric system on machine side with waterproof branch box.