Here is my POTD.
I made an indicator holder for my drill press: the small plastic piece is a morsel of Delrin, ⌀ 10 mm, with an 8 mm hole reduced to 5 mm in the bottom.
This was made with a drill press, since I've nothing else; the outside of the bushing has a dark ring because I cut it with a pipe cutter.
I'm sure many beginners will find pretty difficult to make a concentric hole like this one, so I gathered some basic instructions into a single image: click on it to see the larger version.
For who is browsing with a phone, here is a more readable text description.
1) Get a second chuck. A threaded one is better, because you have to bolt it to the drill table.
2) Insert the bit you have to use in the drill chuck, keeping it very low (grab just the tail of the bit).
3) "Hang" the second chuck to the drill bit. Don't close too much the second chuck, just to
avoid it falling down, or you'll damage the bit.
4) Move the table until you can bolt the second chuck into the table hole and lock both the table and the second chuck.
5) Remove the drill bit and place the piece you have to drill into the lower chuck. If the piece is short add a shim below it, inside the lower chuck.
6) Put the drill bit back into the drill chuck, pushing it at the top. Hint: open the drill chuck at its widest, so you have more clearance to insert the bit.
7) Drill as usual and
don't push too much!
I made this many times, always with successful results (here is why I can't persuade wifey I need a lathe!!!).
Anyway, here is the prosecution of the POTD.
I'm sure someone will ask how can I tram that small vise with such a monster… but this long setup is for the table I use for woodworking:
The chrome bars come from one of my preferred hardware shops (don't remember if Trash Depot or Dumpster Freight) and they are pretty useful. They move on a slotted plywood table bolted to the drill table and behave like a sort of very wide vise. I can even use the holes to clamp down the pieces like on a table with T slots.
I know the aluminum pipe is not the best thing for the indicator holder, but this was just a beta version: I must ask a photocopier shop some more robust steel bars (and use two or three of them).