The parting-tool for brass is governed by the same principle as that for iron, save that its top face must be ground level, except in cases where the cutting edge stands far out from the tool-post, in which event the top face must be ground away at an angle of which the cutting edge is the lowest part. It is rarely, however, necessary for brass-work to grind the cutting edge much below the level of the top face of the body of the tool, as is shown for use on wrought-iron. The degree of hardness of the tool should be the same for brass as that given for wrought-iron.

Parting-Tool. For Brass