Machine Frames are the central component of every Machine in Thermal Expansion. A Machine Frame of any type must be crafted in order to craft a Machine.
The same recipes apply for upgrading existing Machines. Simply replace the Machine Frames with Machines of the same tiers.
There are four tiers of Machine Frames: one for every tier in the mod's tier system. When crafting a Machine with a certain tier of Machine Frame, the Machine will also be of that tier.
Machine Frames and Machines can be upgraded to higher tiers at one tier at a time. In order to craft Frames of higher tiers, the lower tier Frames must be crafted first.
The tier of a Machine determines several of its properties:
The latter few properties are mainly useful for when Processing Speed Augments are installed.