High tonnage hydraulic cylinder with lock nut in high pressure. Pushing force from 50 to 1000 tons with a stroke range from 50 mm to 300 mm. High tonnage suitable for lifting and pushing operations. Operating pressure 700 bar. Guide surfaces are sized to guarantee optimal performance in absorbing the offset load, plunger execution, equipped with stroke indicator and anti overstroke device. Hydraulic jacks equipped with high strength gaskets for maximum durability up to 60° C, upon request it is possible to equip the cylinder with gaskets resistant to high temperatures up to 200° C. Furthermore, the presence of the wiper prevents contamination from impurities present in the environment of use. High tonnage hydraulic cylinder are equipped with a 3/8 “NPT female coupler equipped with an anti dust cap and removable high resistance head and possibility of mounting a self-leveling head for a better distribution of the load to be lifted. Nitox ONC treatment on all internal mechanical parts for maximum resistance to corrosion and wear. All models weighing up to 20 kg are equipped with lifting eyebolts. Sectors of use: steel mills, energy, industry, infrastructure, engineering and testing, mining, shipbuilding, offshore, oil & gas, transport and heavy lifting. Possibility to design and produce custom made hydraulic cylinders on request, with dedicated geometries, performances and features. All models can be connected to different drive units such as hand pumps or electric, air, petrol pumps. A wide range of accessories such as hoses, valves and pressure gauges are available for the composition of the desired hydraulic circuit.