Electromechanical testing machines of the C.5 series in vertical floortop design up to 250kN designed for quasi – dynamic cyclic testing and long-term testing. Permanent exact load with the possibility of cycling up to 2Hz is ensured by means of a central loading mechanism consisting of a central ball screw and a special bearing of a accuracy cycloid gearbox with an integrated AC servo drive. These machines are designed for long-term CREEP tests, creep determination, material stress relaxation, etc. This series of machines is characterized by high frame rigidity, alignment and mechanical resistance.