Fluid under constant pressure is delivered through rotary directional valve 6 to operating cylinder 1, and ram 2, together with blade 3, moves downward until the blade contacts billet 11. At this, ram 2 ceases to descend and cylinder 1, together with crosspiece 4 and bottom blade 5, is moved upward by the pressure of the fluid which continues to be delivered into cylinder 1. This motion shears billet 11 by blades 5 and 3. To reverse blade 5, valve 6 is turned so that fluid is delivered into cylinders 7. The pressure of the fluid moves plungers 8 upward with crosspiece 9. Fluid is discharged from cylinder 1 to tank 10.
$4309$CHP,FD$