Hydraulic shears

 

— in shears of this type, the force required for cutting is created by the pressure of the fluid in the hydraulic cylinder on a special piston. Pressurization is most often carried out by a built-in hand pump. Working with such scissors is as follows: the user shakes the pump handle, and due to the increase in pressure, the cutting edges gradually converge. In terms of application, hydraulic shears are similar to bolt cutters (see the relevant paragraph), they are mainly intended for cutting bars, pipes and other large objects. This is due to the fact that this principle of operation is poorly suited for sheet metal, but it allows you to create a tool with high pressure on the cut.