As the MC23 model also MC53 one has its extra 90mm vertical clearance version . This allows to equip the machine with system for big overall dimension pieces without losing accuracy and reliability, the most important cha......As the MC23 model also MC53 one has its extra 90mm vertical clearance version . This allows to equip the machine with system for big overall dimension pieces without losing accuracy and reliability, the most important characteristic of these models. The Z axis travel is always 75 mm even if the clearance is higher.