If the edge forming the diameter has no clearance upon it, the cutting being performed by the end edges, the cutter may be left with a square, slightly rounded, or bevelled corner; but if the cutter have clearance on its outside or diametrical edge, as shown on the cutters in Fig.
"Modern Machine-Shop Practice, Volumes I and II"
Joshua Rose
Cutters intended to be adjusted to suit bores of varying diameter should have clearance on the end and on the diametrical edges.
"Modern Machine-Shop Practice, Volumes I and II"
Joshua Rose
1315, of the plates P P, the tool cannot approach any nearer to the diametrical centre of the work; hence the diameter to which the tool will turn is determined by the distance of the shoulder O of the plate P from the centre of the lathe centres, as shown in Fig.
"Modern Machine-Shop Practice, Volumes I and II"
Joshua Rose