When plunger 1 is moved downward by fluid entering above it, clamping member 3, mounted rigidly on plunger 1, clamps round workpiece 2 in a V-block. The axis of plunger 1 is parallel to hole a to be machined in workpiece 2. Locating points d of member 3 are in a plane perpendicular to the axis of hole a, locating the workpiece with its slot perpendicular to the axis of the guide bushing. Workpiece 2 is released and plunger 1 is returned to its initial position by spring 4.
$3743$SHP,GC$