Defined specification
If part size, wall thickness, resin, target granulate and screen aperture are already known, send them as one brief so factories quote the same rotor family. Adjacent shredders, wash lines or pelletizers belong on a separate line unless you add them explicitly.
Send requirementsSelection still open
If you still need to choose between a hard plastic crusher duty and a light scrap hopper, keep those routes labelled. Do not ask factories to invent a universal machine. Review how manufacturer quotes are aligned before mixing hollow containers with thick sections on one drawing.
Review sourcing steps