Widening an existing hole to achieve the desired diameter and hole tolerances.
We have chosen the above definition since all REAMING operations affect both hole diameter and tolerances.
Others define REAMING as widening an existing hole without any connection to hole tolerances.
To correct a hole center position is only possible with the BORING and FINISH BORING. Brotsching and honing affects only the diameter of the hole roundness as they are governed by the existing hole center.