Parts of Speech for Rack-and-pinion
rack-and-pin·ion
R r Gramatical Hierarchy
Grammatically "Rack-and-pinion" is a noun, to be more precise even a verb with objects. But also it is used as a verb, specifically a verb with objects. Part of speech depends on meaning of this word.
All about rack-and-pinion Download all about rack-and-pinion in pdf