Applies only to those mechanical power presses commonly referred to by the metal working industry at Bench, Open Back Inclinable, Open Back Stationary, and Adjustable Bed/Horn Presses that shear, punch, form, or assemble metal or other materials by means of dies or press tooling attached to the slide and bolster or bed of said presses.
ANSI B5.52M-1980 history
1980ANSI B5.52M-1980 Presses, General Purpose, Single Point, Gap Type, Mechanical Power (Metric)