Examples from the Web for assembler
Nothing—whereas Penman had been reared in the factory where they were made, and had long been a foreman "assembler."A Tatter of Scarlet|S. R. Crockett
He was evidently no maker of clocks as "bits o' mechanism," or an assembler of parts.
In the hymns of the Rigveda he is the assembler of the people, the king, the pattern of just dealing.The History of Antiquity, Volume IV (of 6)|Max Duncker
The clockmaker, and even then there is something personal yet remaining, became an assembler of component parts.