If you cut something in half, do you get two parts or two pieces? Do they convey different meanings? This is in the context of a mechanical part physically cut in two.
closed as too localized by JSBձոգչ, Robusto, Matt Эллен, RegDwigнt♦ Mar 6 '12 at 16:02
This question is unlikely to help any future visitors; it is only relevant to a small geographic area, a specific moment in time, or an extraordinarily narrow situation that is not generally applicable to the worldwide audience of the internet. For help making this question more broadly applicable, visit the help center.If this question can be reworded to fit the rules in the help center, please edit the question.
In the context of a mechanical assembly, I would understand 'part' to refer to a component or subassembly which might have been dismounted from the whole, while 'piece' would be an arbitrary fragment, e.g. that resulting from a straight cut or break.