Milling to match: milling is counter-low, or down-current milling.
Milling oposition: milling is against the edge, or normal milling.
In the milling in accordance, the tool xira in the same feeling in the progress of the piece. This type of milling is also known as contra-low milling because, when the xiru of the mill is horizontal, the vertical component of the cutting force is directed against the pack. In the milling oposition, also known as milling is against the edge, the opposite occurs, this is, the tool will go in the opposite direction to the best of the piece and the vertical component of the cutting force is directed against the edge.