In line with the national standard gb/t17906-1999 "hydraulic demolition tools General technical conditions", shear capacity, ring blade shear can cut the diameter of 20mm of round steel, straight blade shearing device can cut the thickness of 5mm plate, opening distance 125mm. The shearing device completes from the closed position to the maximum opening, then returns to the original position and 50 consecutive cycles, continuous shear length 100mm, diameter 16mm round steel or shear length 100mm, wide 50mm, thick 1.6mm steel plate 50 times, after the test action is normal, no leakage and abnormal phenomenon, the edge without curl, blade phenomenon.