noun
shearing machine; shearer
Industrial machine for cutting or shearing materials such as metal, paper, or fabric. Technical term.
この工場では、せん断機で鋼板を切断している。
In this factory, they cut steel plates with a shearing machine.
せん断機の刃を定期的に交換する必要がある。
The blades of the shearing machine need to be replaced regularly.
切断機 is a more general term for cutting machines, while せん断機 specifically refers to shearing (cutting by applying shear force).
Compound of せん断 (shearing) + 機 (machine). The term せん断 is a technical word for shearing, derived from the verb せん断する (to shear).