When piston 1 is moved to the left by fluid delivered to the right end of the cylinder, its rod spreads plungers 2 radially outward, clamping a workpiece by its shoulder against the end face of the chuck. The workpiece is located on two holes by pins 3. Six plungers 2, sliding in radial holes machined in floating ring 4, are retracted to the centre by springs 5, releasing the workpiece, when piston 1 is moved by a spring to the right.
$3878$LHP,GC$