Ram Hydraulic Cylinder Jack 50 tons 4 (100mm) Stroke Single Acting 120mm Dia On January 24, 2024 by admin 50-Tons Hydraulic Cylinder Jack Single Acting 4 Stroke (100 mm) Lifting Jack Ram 635cc. This is a new 50Ton Hydraulic Cylinder Jack. In order to operate correctly, all oil cylinders need to be connected with solid and flat surfaces.