Slide

The main reciprocating member of a press, guided in the press frame, to which the punch or upper die is fastened; sometimes called the ram. The inner slide of a double-action press is called the plunger or punch-holder slide; the outer slide is called the blankholder slide. The third slide of a triple-action press is called the lower slide, and the slide of a hydraulic press is often called the platen.

Source: The OHIO State University