Stackers typically move on a rail between stockpiles in a yard and usually have three directions of movement, depending on requirements:

• Horizontally along the rail
• Vertically by luffing (raising or lowering) the boom
• Slewing, which is rotation of the stacker around its central axis and may not always be a requirement

Our machines generally boast a typical design structure and include a hydraulic lift system and counterweight at the rear end of the boom – this often leads to them being classified as a “balanced machine” in some countries. Nonetheless, we have also built machines to handle ore which boast an L-frame, a rope winch and a horizontal swivel boom. Also, as mentioned, we offer machines with or without the ability to slew.