BY MEANS OF A HYDROPNEUMATIC PRESSURE CONVERTER, THE FORCE OF THESE MACHINES IS BOOSTED AND CAN REACH SILENTLY AND QUICKLY AS MUCH AS 20 TONS AND 10 TONS RESPECTIVELY, WITH MINIMUM AIR CONSUMPTION, FOR OPERATIVE STROKES U......BY MEANS OF A HYDROPNEUMATIC PRESSURE CONVERTER, THE FORCE OF THESE MACHINES IS BOOSTED AND CAN REACH SILENTLY AND QUICKLY AS MUCH AS 20 TONS AND 10 TONS RESPECTIVELY, WITH MINIMUM AIR CONSUMPTION, FOR OPERATIVE STROKES UP TO 2mm AND 4.5mm. THESE MODELS ARE THUS IDEAL FOR MARKING AND RIVETING OR SIMILAR OPERATIONS.These presses feature a quick approach stroke and an operative stroke ranging from 0 to 35mm. The operative stroke at maximum force starts automatically as the pressing tool comes into contact with the workpiece at the end of the approach stroke.By maintaining constant the product of the force (tons) by the operative stroke (mm), which is 50 for the models concerned, other machines can be made available for different applications (for instance, 5 tons and a theoretical operative stroke of 10mm).