Modern names may be different than those historically used. A prime example is Folding Machine which is now referred to as a Sheet metal Bar Folder or Barfolder. The Bar is a major part of the folding Machine so that may have been an origination for the term. Another example could have been the Jaw and we may have called it a Jaw Folder. The 180-degree bend that a Bar-folder makes is called a lock. The seaming machine for making lock seam is properly called a Groover or Grooving Machine. The hand seamer is called a grooving tool. The term Seaming was reserved for machines that perform the double seaming of vessels.
The post, upon which machines rest, are called standards. Some people just call it a stand. The A W Whitney company called them “pillars”
The fence, against which the work is placed, on a machine would be called the sliding gauge.