| Just so that we are on the same page, Trepanning to me is using a parting tool to cut into the face of the work by running it in with either the cross slide or the compound. Usually for the high forces generated I would lock the carriage and use the compound and just releive the outside edge of the parting tool to clear the radius.
Is this the same procedure as you used?
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“Dirty British coaster with a salt-caked smoke stack, Butting through the Channel in the mad March days" |