For drilling standard holes in metal, there are three primary types of drills: twist, spade and indexable insert. This article discusses the pros and cons of each design and the applications for which each might be appropriate. Factors considered include hole depth, tool cost, drill speed, coolant delivery, tool inventory required, machine tool requirements and expected tool life.
Imported from the CTE archive to seed discussion on MFGAxis.
Originally published on CTE: 1995-02-01
CTE source: https://ctemag.com/articles/switch-drills/
Legacy path: /articles/switch-drills