When piston 1 is moved to the right by fluid entering its cylinder, movable jaw 2 slides along guide 7, clamping workpieces 3 which are mounted on arbor 4. The ends of arbor 4 enter bushings 5 and 6, fitted into movable jaw 2 and stationary jaw 10. Fluid is delivered to the cylinder along channel d from selector valve 8. Workpieces 3 are released when piston 1 is moved to the left by spring 9.
$3740$SHP,GC$