Ford Focus>> Introduction>> Councils of professionals at work with carving connection>> Carving cutting
As easy alloys have smaller hardness, than steel, the carving is cut in them easier. Cutting of a new carving occurs in three stages. Respectively rezbonarezayushchy tool: a draft tap (one ring on a core), an intermediate tap (two rings on a core), a fair tap (without or three rings on a core).
These three taps alternately at continuous supply of oil are rolled and turned out from previously drilled opening.