| A | B |
|---|
| threading | forming internal |
| drilling | producing a hole with a drill |
| forming | producing a desired shape |
| shouldering | finshing surface where two diamters or steps meet |
| reaming | enlarging a hole slighty with a multi-fluted cutter |
| tapping | producing internalthreads with a tap |
| grooving | cutting a recess in work |
| boring | enlarging an existing hole |
| center drilling | producing a tapered hole in end of work so that part cqn be held between centers |
| facing | removing material from end surface or part |
| cutoff | cutting apart from work with a thin tool while work is rotating |
| filing | chamfering or reducing diameter of work with a file while work is rotating |
| turing | removing material from outside surface of part |
| knurling | producing a raised patteren on surface of work to improve grip or apperance |
| chamfering | producing a flat, angulaer surafce on the edge of a machined part |
