Reaming is a chip removal process with which you want to enlarge a hole and achieve a certain surface finish and certain dimensional tolerances. So it is a finish of the holes that are made in the reamer.
El reamer is a tool similar to a drill, to which we tell it to make two movements, one of rotation on its axis and another of rectilinear movement along the axis.
We can carry out the finishes with a machine tool or manually.
Reaming should be done at low cutting speeds. A very small amount of material is to be removed.