STAY BOLT
The stay bolt passes through the main cam shaft bracket cap and screws into the column. The object of the stay bolt is to take the strain from the column. When the machine is in casting position with the pot locking against the mold, the mold and disk forcing against the vise, and the right-hand side of the vise locking against the stud, there is considerable strain on the column. If the column should spring, the vise would also move and the lockup would be imperfect. In applying the stay bolt, never tighten it with a wrench. If too tight, it will spring the bracket cap and cause the cam shaft to bind and the clutch will not drive the machine. Screw it in with your fingers until the head of the bolt bears lightly against the bracket.
VISE AUTOMATIC
The purpose of the vise automatic is to prevent the mold from coming forward and shearing the lugs of the matrices whenever anything prevents the first elevator from descending low enough for the first elevator adjusting screw to rest on the vise cap.
The vise automatic consists of a stop rod, stop rod pawl, mold disk dog, and vise automatic levers.
The stop rod is suspended and held upward by a spring, the top end of the rod extending through the vise cap and the lower end resting back of the lever which operates against the clutch rod.
A little below center in the stop rod is the stop rod pawl. This pawl is held in place in a slot by a small coil spring which sets just back of the pawl in the stop rod. This spring, in addition to holding the pawl in place, also gives the pawl a little play which allows more of a bite when the pawl is placed in action.
The mold disk dog is held in the vise frame by a screw which extends downward through a slotted hole in the dog. Inside the mold disk dog is a coil spring. This spring is to hold the dog back toward the mold and should be strong enough to keep the mold disk dog pin against the retaining screw when the vise automatic is not in action.
When the first elevator is in its lowest position the vise automatic adjusting screw touches the upper end of the stop rod and forces it downward. When the mold slide advances, the mold opposite the one in use pushes the mold disk dog out, above the pawl, and allows the machine to remain in action. However, should the first elevator fail to descend low enough for the stop rod to be pushed down, the dog, as it is advanced by the mold, strikes against the pawl and forces it forward against the vise automatic levers, stopping the machine.
The mold disk dog must clear the automatic stop rod when the first elevator adjusting screw is resting on the vise cap.