At the present time micro-drills with planar point geometry are preval
ent in industrial practice. Unfortunately, they possess a number of un
desired characteristics and limitations that influence their performan
ce in terms of hole quality and tool life. To resolve the problems of
planar micro-drills, this paper focuses on issues related to micro-dri
ll point geometry (including the flank and flute) and presents a frame
work for a technology, built around a computer integrated system, for
the design, manufacture, and evaluation of drills in general and of a
new generation of micro-drills with curved helical point and flute geo
metry in particular. It is expected that this technology will support
the rapid development of new customized micro-drills to meet specific
manufacturing requirements. (C) 1998 Elsevier Science Ltd. All rights
reserved.