I needed a simple way to organize my metric ER-20 collet set. Initially, I tossed them in a pencil box. That did keep them from rolling away but certainly was not a satisfying solution. Could have CNC’d a plate with tapered holes but that really didn’t interest me. I liked the idea of a tapered hole to help retain each collet but didn’t want to put forth a lot of effort. Then the trick hit me – use a step drill!
If you are interested, please see
Your comments are welcome. All of us are smarter than any one of us.
If you wish to receive future article announcements automatically, please send me an email with “Article Alias” in the subject line.