In the dictionary the word shear can be a verb or a noun. In the world of machines this is also true, but the word shear becomes a descriptive noun when other words to describe the machine are omitted. Often 2 blades are connected together by a single pivot and simply called a shear. The movement or action may be additionally described as a scissor a shear may also have cylindrically shaped blades which would make it a rotary shear There are more way to describe a shear as well.
The word guillotine is usually thought of a machine with a blade mounted vertically and dropped or moved by force to cleave or sever an object in two when 1 blade passes the other causing a shearing or cutting action.
A lot of machines are called guillotine shears describing the movement or action of the blades, or simply a shear. Cutting machines with blades connected by a pivot are often called scissor shears, or simply a shear as well. SO, I would guess that either term for the machine in question could be both technically correct and technically wrong depending on one's perception of how it is named.
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Altair (Jan 23, 2022)
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